Trial Outcomes & Findings for Safety and Efficacy Evaluation Of Pregabalin (Lyrica) With Patients With Generalized Anxiety Disorder (NCT NCT00624780)

NCT ID: NCT00624780

Last Updated: 2021-01-28

Results Overview

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

• Recruitment status: COMPLETED
• Study phase: PHASE4
• Target enrollment: 615 participants
• Primary outcome timeframe: Baseline, Week 1 post-treatment discontinuation (discontinuation occurred prior to Week 9)
• Results posted on: 2021-01-28

Participant Flow

This study employed 3 treatments in Period 1 and 6 treatments in Period 2. Randomization occurred once, at the onset of Period 1.

Participant milestones

Measure	Pregabalin High Dose, Pregabalin High Dose Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Pregabalin Low Dose Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Treatment Optimization (Up to Week 12) STARTED	154	52	154	52	153	50
Treatment Optimization (Up to Week 12) COMPLETED	121	39	112	38	114	39
Treatment Optimization (Up to Week 12) NOT COMPLETED	33	13	42	14	39	11
Fixed Dosing (Week 13 to Week 24) STARTED	121	39	112	38	114	39
Fixed Dosing (Week 13 to Week 24) COMPLETED	106	28	94	27	95	30
Fixed Dosing (Week 13 to Week 24) NOT COMPLETED	15	11	18	11	19	9
Treatment Discontinuation (Week 25) STARTED	106	28	94	27	95	30
Treatment Discontinuation (Week 25) COMPLETED	104	28	91	26	95	29
Treatment Discontinuation (Week 25) NOT COMPLETED	2	0	3	1	0	1
Follow-up (Week 26) STARTED	104	28	91	26	95	29
Follow-up (Week 26) COMPLETED	102	27	89	26	93	29
Follow-up (Week 26) NOT COMPLETED	2	1	2	0	2	0

Reasons for withdrawal

Measure	Pregabalin High Dose, Pregabalin High Dose Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Pregabalin Low Dose Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Treatment Optimization (Up to Week 12) Adverse Event	7	5	15	3	9	5
Treatment Optimization (Up to Week 12) Lack of Efficacy	5	2	10	5	9	1
Treatment Optimization (Up to Week 12) Lost to Follow-up	1	0	2	0	2	1
Treatment Optimization (Up to Week 12) Withdrawal by Subject	10	2	7	4	10	4
Treatment Optimization (Up to Week 12) Other	10	4	8	2	9	0
Fixed Dosing (Week 13 to Week 24) Adverse Event	5	4	5	2	3	1
Fixed Dosing (Week 13 to Week 24) Lack of Efficacy	2	1	2	5	5	2
Fixed Dosing (Week 13 to Week 24) Lost to Follow-up	1	0	1	0	1	1
Fixed Dosing (Week 13 to Week 24) Withdrawal by Subject	2	3	6	3	6	2
Fixed Dosing (Week 13 to Week 24) Other	5	3	4	1	4	3
Treatment Discontinuation (Week 25) Adverse Event	1	0	2	1	0	1
Treatment Discontinuation (Week 25) Lack of Efficacy	1	0	0	0	0	0
Treatment Discontinuation (Week 25) Lost to Follow-up	0	0	1	0	0	0
Follow-up (Week 26) Death	0	0	1	0	0	0
Follow-up (Week 26) Adverse Event	0	0	0	0	1	0
Follow-up (Week 26) Lost to Follow-up	0	0	1	0	1	0
Follow-up (Week 26) Withdrawal by Subject	1	0	0	0	0	0
Follow-up (Week 26) Other	1	1	0	0	0	0

Baseline Characteristics

Safety and Efficacy Evaluation Of Pregabalin (Lyrica) With Patients With Generalized Anxiety Disorder

Baseline characteristics by cohort

Measure	Pregabalin High Dose, Pregabalin High Dose n=154 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose, Placebo n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Pregabalin Low Dose n=154 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Lorazepam n=153 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=50 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Total n=615 Participants Total of all reporting groups
Age, Customized 18 to 44 years	75 participants n=5 Participants	30 participants n=7 Participants	100 participants n=5 Participants	28 participants n=4 Participants	86 participants n=21 Participants	27 participants n=8 Participants	346 participants n=8 Participants
Age, Customized 45 to 64 years	79 participants n=5 Participants	22 participants n=7 Participants	51 participants n=5 Participants	24 participants n=4 Participants	66 participants n=21 Participants	23 participants n=8 Participants	265 participants n=8 Participants
Age, Customized Greater than or equal to 65 years	0 participants n=5 Participants	0 participants n=7 Participants	3 participants n=5 Participants	0 participants n=4 Participants	1 participants n=21 Participants	0 participants n=8 Participants	4 participants n=8 Participants
Sex: Female, Male Female	89 Participants n=5 Participants	30 Participants n=7 Participants	101 Participants n=5 Participants	32 Participants n=4 Participants	95 Participants n=21 Participants	27 Participants n=8 Participants	374 Participants n=8 Participants
Sex: Female, Male Male	65 Participants n=5 Participants	22 Participants n=7 Participants	53 Participants n=5 Participants	20 Participants n=4 Participants	58 Participants n=21 Participants	23 Participants n=8 Participants	241 Participants n=8 Participants

PRIMARY outcome

Timeframe: Baseline, Week 1 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included. n=participants evaluable at given time points for each group.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=21 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=15 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=19 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 Baseline (n=15,19,21)	24.4 units on a scale Standard Deviation 4.88	—	25.8 units on a scale Standard Deviation 4.23	24.9 units on a scale Standard Deviation 4.15	—	—
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 Change at Discontinuation Week 1 (n=15,19,18)	-9.9 units on a scale Standard Deviation 10.81	—	-7.7 units on a scale Standard Deviation 6.75	-5.9 units on a scale Standard Deviation 7.20	—	—

PRIMARY outcome

Timeframe: Baseline, Week 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Population: Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. Here, 'N' (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=16 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=14 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=15 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 2	-9.7 units on a scale Standard Deviation 11.08	—	-12.0 units on a scale Standard Deviation 7.24	-5.9 units on a scale Standard Deviation 5.46	—	—

PRIMARY outcome

Timeframe: Baseline, Week 1 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=58 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 Baseline	24.6 units on a scale Standard Deviation 4.76	—	25.0 units on a scale Standard Deviation 5.37	24.7 units on a scale Standard Deviation 3.89	—	—
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 Change at Discontinuation Week 1	-15.8 units on a scale Standard Deviation 7.92	—	-15.3 units on a scale Standard Deviation 7.76	-15.3 units on a scale Standard Deviation 6.71	—	—

PRIMARY outcome

Timeframe: Baseline, Week 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Population: Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=44 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=54 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=49 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 2	-16.0 units on a scale Standard Deviation 7.96	—	-15.6 units on a scale Standard Deviation 7.42	-14.9 units on a scale Standard Deviation 7.11	—	—

PRIMARY outcome

Timeframe: Baseline, Week 1 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=94 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=29 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=109 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=30 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=100 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=30 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 Baseline	24.7 units on a scale Standard Deviation 3.85	24.9 units on a scale Standard Deviation 3.82	25.5 units on a scale Standard Deviation 3.85	24.2 units on a scale Standard Deviation 4.64	24.6 units on a scale Standard Deviation 4.36	24.9 units on a scale Standard Deviation 3.93
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 Change at Discontinuation Week 1	-18.4 units on a scale Standard Deviation 6.33	-16.5 units on a scale Standard Deviation 7.25	-17.6 units on a scale Standard Deviation 7.25	-18.7 units on a scale Standard Deviation 5.36	-16.2 units on a scale Standard Deviation 8.11	-19.1 units on a scale Standard Deviation 6.69

PRIMARY outcome

Timeframe: Baseline, Week 2 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Population: Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=84 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=26 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=107 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=29 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=94 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=30 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 2	-18.3 units on a scale Standard Deviation 7.05	-16.0 units on a scale Standard Deviation 8.17	-16.6 units on a scale Standard Deviation 8.53	-19.1 units on a scale Standard Deviation 5.80	-16.7 units on a scale Standard Deviation 7.52	-18.7 units on a scale Standard Deviation 7.38

PRIMARY outcome

Timeframe: Last visit on treatment, Week 1 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Population: Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=20 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=15 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=18 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 Last visit on treatment (n=15,18,20)	13.1 units on a scale Standard Deviation 10.75	—	10.1 units on a scale Standard Deviation 8.72	16.8 units on a scale Standard Deviation 13.20	—	—
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 Change at Discontinuation Week 1 (n=15,18,18)	-4.2 units on a scale Standard Deviation 6.12	—	0.1 units on a scale Standard Deviation 9.89	-2.8 units on a scale Standard Deviation 7.99	—	—

PRIMARY outcome

Timeframe: Last visit on treatment, Week 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Population: Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants evaluable for this measure.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=16 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=14 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=15 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 2	-3.2 units on a scale Standard Deviation 6.05	—	-2.0 units on a scale Standard Deviation 6.39	-2.7 units on a scale Standard Deviation 9.04	—	—

PRIMARY outcome

Timeframe: Last visit on treatment, Week 1 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Population: Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=50 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=58 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 Last visit on treatment	5.0 units on a scale Standard Deviation 3.80	—	7.2 units on a scale Standard Deviation 7.32	6.5 units on a scale Standard Deviation 6.01	—	—
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 Change at Discontinuation Week 1	2.3 units on a scale Standard Deviation 6.60	—	1.9 units on a scale Standard Deviation 7.29	1.4 units on a scale Standard Deviation 4.52	—	—

PRIMARY outcome

Timeframe: Last visit on treatment, Week 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Population: Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=44 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=54 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=49 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 2	1.6 units on a scale Standard Deviation 6.33	—	2.1 units on a scale Standard Deviation 6.11	2.0 units on a scale Standard Deviation 5.51	—	—

PRIMARY outcome

Timeframe: Last visit on treatment, Week 1 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Population: Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis. Here, 'N' (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=93 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=29 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=109 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=30 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=100 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=30 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 Last visit on treatment	3.9 units on a scale Standard Deviation 4.14	6.5 units on a scale Standard Deviation 6.72	5.2 units on a scale Standard Deviation 5.62	4.9 units on a scale Standard Deviation 7.15	5.3 units on a scale Standard Deviation 6.65	4.7 units on a scale Standard Deviation 4.50
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 Change at Discontinuation Week 1	1.1 units on a scale Standard Deviation 3.50	1.0 units on a scale Standard Deviation 4.37	1.7 units on a scale Standard Deviation 4.92	0.0 units on a scale Standard Deviation 2.18	3.0 units on a scale Standard Deviation 6.79	-0.1 units on a scale Standard Deviation 3.22

PRIMARY outcome

Timeframe: Last visit on treatment, Week 2 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Population: Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=84 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=26 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=106 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=29 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=93 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=30 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 2	1.7 units on a scale Standard Deviation 4.78	1.8 units on a scale Standard Deviation 5.14	2.8 units on a scale Standard Deviation 5.99	-1.0 units on a scale Standard Deviation 5.65	2.2 units on a scale Standard Deviation 6.02	-0.1 units on a scale Standard Deviation 3.63

SECONDARY outcome

Timeframe: 2 weeks post-treatment discontinuation (discontinuation occurred prior to Week 9)

Population: Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Rebound anxiety was defined as a rapid return of the participant's original symptoms following drug discontinuation, that were worse compared to baseline. This was characterized by a HAM-A score at the Discontinuation Week 1 or Week 2 greater than or equal to the baseline value.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=18 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=15 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=19 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Number of Participants With Rebound Anxiety for Cohort 1 (Less Than 3-Month Last Visit)	1 participants	—	1 participants	5 participants	—	—

SECONDARY outcome

Timeframe: 2 weeks post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Population: Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Rebound anxiety was defined as a rapid return of the participant's original symptoms following drug discontinuation, that were worse compared to baseline. This was characterized by a HAM-A score at the Discontinuation Week 1 or Week 2 greater than or equal to the baseline value.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=48 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=58 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Number of Participants With Rebound Anxiety for Cohort 2 (3-Month Last Visit)	2 participants	—	3 participants	1 participants	—	—

SECONDARY outcome

Timeframe: 2 weeks post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Population: Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Rebound anxiety was defined as a rapid return of the participant's original symptoms following drug discontinuation, that were worse compared to baseline. This was characterized by a HAM-A score at the Discontinuation Week 1 or Week 2 greater than or equal to the baseline value.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=94 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=28 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=109 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=30 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=100 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=30 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Number of Participants With Rebound Anxiety for Cohort 3 (6-Month Last Visit)	0 participants	1 participants	4 participants	0 participants	6 participants	0 participants

SECONDARY outcome

Timeframe: 2 weeks post-treatment discontinuation (discontinuation occurred prior to Week 9)

Population: Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis.

DESS adverse events, a subset of Treatment Emergent Signs and Symptoms (TESS), were defined as those spontaneously reported adverse events that developed or existed prior to but worsened during Discontinuation Week 1 and 2.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=21 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=15 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=19 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 1 (Less Than 3-Month Last Visit) Newly developed DESS	3 participants	—	6 participants	0 participants	—	—
Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 1 (Less Than 3-Month Last Visit) Worsened DESS	0 participants	—	0 participants	0 participants	—	—

SECONDARY outcome

Timeframe: 2 weeks post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Population: Per-protocol analysis set. Cohort 1: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis.

DESS adverse events, a subset of Treatment Emergent Signs and Symptoms (TESS), were defined as those spontaneously reported adverse events that developed or existed prior to but worsened during Discontinuation Week 1 and 2.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=58 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 2 (3-Month Last Visit) Newly developed DESS	36 participants	—	40 participants	38 participants	—	—
Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 2 (3-Month Last Visit) Worsened DESS	1 participants	—	1 participants	2 participants	—	—

SECONDARY outcome

Timeframe: 2 weeks post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Population: Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis.

DESS adverse events, a subset of Treatment Emergent Signs and Symptoms (TESS), were defined as those spontaneously reported adverse events that developed or existed prior to but worsened during Discontinuation Week 1 and 2.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=94 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=29 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=109 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=30 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=100 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=30 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 3 (6-Month Last Visit) Worsened DESS	2 participants	1 participants	2 participants	0 participants	5 participants	0 participants
Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 3 (6-Month Last Visit) Newly developed DESS	35 participants	17 participants	78 participants	5 participants	50 participants	7 participants

SECONDARY outcome

Timeframe: Baseline, Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Population: Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=21 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=14 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=19 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 and 2 Baseline (n=14,19,21)	16.4 units on a scale Standard Deviation 8.62	—	13.6 units on a scale Standard Deviation 8.19	17.6 units on a scale Standard Deviation 10.68	—	—
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 and 2 Change at Discontinuation Week 1 (n=14,19,18)	-5.9 units on a scale Standard Deviation 7.43	—	-3.4 units on a scale Standard Deviation 11.91	-3.3 units on a scale Standard Deviation 9.12	—	—
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 and 2 Change at Discontinuation Week 2 (n=13,15,16)	-5.4 units on a scale Standard Deviation 8.34	—	-4.7 units on a scale Standard Deviation 10.62	-2.7 units on a scale Standard Deviation 8.20	—	—

SECONDARY outcome

Timeframe: Baseline, Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Population: Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=57 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=51 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 and 2 Change at Discontinuation Week 1 (n=57,51,49)	-7.6 units on a scale Standard Deviation 9.53	—	-8.5 units on a scale Standard Deviation 9.40	-9.3 units on a scale Standard Deviation 9.48	—	—
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 and 2 Change at Discontinuation Week 2 (n=53,48,44)	-8.0 units on a scale Standard Deviation 9.70	—	-8.3 units on a scale Standard Deviation 9.53	-8.7 units on a scale Standard Deviation 9.68	—	—
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 and 2 Baseline (n=57,51,52)	14.8 units on a scale Standard Deviation 7.86	—	17.4 units on a scale Standard Deviation 7.81	17.1 units on a scale Standard Deviation 9.84	—	—

SECONDARY outcome

Timeframe: Baseline, Week 1, 2 post-treatment discontinuation (discontinuation [DC] occurred after Week 15 to Week 24)

Population: Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n'=participants evaluable at given time points for each group respectively.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=94 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=29 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=109 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=30 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=99 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=30 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 and 2 Baseline (n=109,30,94,29,99,30)	16.1 units on a scale Standard Deviation 7.52	17.4 units on a scale Standard Deviation 9.28	17.8 units on a scale Standard Deviation 8.36	17.8 units on a scale Standard Deviation 7.79	16.8 units on a scale Standard Deviation 8.85	14.9 units on a scale Standard Deviation 7.61
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 and 2 Change at DC Week 1 (n=109,30,94,29,99,30)	-11.0 units on a scale Standard Deviation 8.08	-9.9 units on a scale Standard Deviation 10.98	-11.0 units on a scale Standard Deviation 9.48	-12.9 units on a scale Standard Deviation 7.89	-8.7 units on a scale Standard Deviation 10.77	-10.4 units on a scale Standard Deviation 7.58
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 and 2 Change at DC Week 2 (n=106,29,84,26,92,30)	-10.8 units on a scale Standard Deviation 8.42	-10.2 units on a scale Standard Deviation 8.56	-9.8 units on a scale Standard Deviation 10.32	-13.8 units on a scale Standard Deviation 8.32	-9.6 units on a scale Standard Deviation 9.70	-10.3 units on a scale Standard Deviation 7.50

SECONDARY outcome

Timeframe: Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Population: Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=18 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=15 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=19 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) Discontinuation Week 1 (n=15,19,18)	9.1 units on a scale Standard Deviation 9.25	—	10.2 units on a scale Standard Deviation 7.97	14.3 units on a scale Standard Deviation 10.04	—	—
Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) Discontinuation Week 2 (n=14,15,16)	10.6 units on a scale Standard Deviation 9.39	—	8.2 units on a scale Standard Deviation 6.70	14.1 units on a scale Standard Deviation 9.16	—	—

SECONDARY outcome

Timeframe: Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Population: Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=49 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=58 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) Discontinuation Week 1 (n=58,52,49)	7.3 units on a scale Standard Deviation 6.69	—	9.1 units on a scale Standard Deviation 6.82	8.0 units on a scale Standard Deviation 6.19	—	—
Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) Discontinuation Week 2 (n=54,49,44)	6.9 units on a scale Standard Deviation 6.38	—	8.9 units on a scale Standard Deviation 7.28	8.3 units on a scale Standard Deviation 6.32	—	—

SECONDARY outcome

Timeframe: Week 1, 2 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Population: Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=94 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=29 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=109 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=30 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=99 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=30 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) Discontinuation Week 1 (n=109,30,94,29,99,30)	5.1 units on a scale Standard Deviation 4.45	7.4 units on a scale Standard Deviation 6.43	6.8 units on a scale Standard Deviation 6.56	4.9 units on a scale Standard Deviation 5.73	8.0 units on a scale Standard Deviation 7.45	4.6 units on a scale Standard Deviation 4.22
Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) Discontinuation Week 2 (n=106,29,84,26,93,30)	5.7 units on a scale Standard Deviation 6.11	7.1 units on a scale Standard Deviation 8.65	7.9 units on a scale Standard Deviation 7.59	4.1 units on a scale Standard Deviation 4.17	7.1 units on a scale Standard Deviation 6.64	4.6 units on a scale Standard Deviation 4.67

SECONDARY outcome

Timeframe: Last visit on treatment, Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Population: Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=20 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=15 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=18 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 and 2 Last visit on treatment (n=15,18,20)	16.1 units on a scale Standard Deviation 10.11	—	16.1 units on a scale Standard Deviation 8.46	21.6 units on a scale Standard Deviation 6.18	—	—
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 and 2 Change at Discontinuation Week 1 (n=15,18,18)	-2.4 units on a scale Standard Deviation 3.31	—	2.0 units on a scale Standard Deviation 11.45	-2.3 units on a scale Standard Deviation 4.63	—	—
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 and 2 Change at Discontinuation Week 2 (n=14,15,16)	-2.2 units on a scale Standard Deviation 4.18	—	-2.3 units on a scale Standard Deviation 9.47	-3.5 units on a scale Standard Deviation 5.34	—	—

SECONDARY outcome

Timeframe: Last visit on treatment, Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Population: Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=50 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=58 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 and 2 Last visit on treatment (n=58,52,50)	6.7 units on a scale Standard Deviation 4.29	—	8.0 units on a scale Standard Deviation 6.57	8.5 units on a scale Standard Deviation 6.50	—	—
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 and 2 Change at Discontinuation Week 1 (n=58,52,48)	2.3 units on a scale Standard Deviation 5.74	—	1.7 units on a scale Standard Deviation 6.69	0.9 units on a scale Standard Deviation 4.03	—	—
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 and 2 Change at Discontinuation Week 2 (n=54,49,44)	1.5 units on a scale Standard Deviation 5.37	—	1.5 units on a scale Standard Deviation 5.55	1.5 units on a scale Standard Deviation 6.43	—	—

SECONDARY outcome

Timeframe: Last visit on treatment, Week 1, 2 post-treatment discontinuation (discontinuation [DC] occurred after Week 15 to Week 24)

Population: Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included. N(Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=93 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=29 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=109 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=30 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=100 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=30 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 and 2 Last visit on treatment (n=109,30,93,29,100,30)	5.6 units on a scale Standard Deviation 5.02	8.3 units on a scale Standard Deviation 6.49	6.3 units on a scale Standard Deviation 5.89	5.5 units on a scale Standard Deviation 6.12	5.6 units on a scale Standard Deviation 6.17	5.5 units on a scale Standard Deviation 4.66
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 and 2 Change at DC Week 1 (n=109,30,93,28,99,30)	0.7 units on a scale Standard Deviation 3.08	0.6 units on a scale Standard Deviation 2.69	1.6 units on a scale Standard Deviation 4.37	-0.0 units on a scale Standard Deviation 2.30	3.0 units on a scale Standard Deviation 5.73	0.3 units on a scale Standard Deviation 3.01
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 and 2 Change at DC Week 2 (n=107,29,84,26,94,30)	1.2 units on a scale Standard Deviation 3.90	1.5 units on a scale Standard Deviation 5.08	2.5 units on a scale Standard Deviation 5.74	-0.8 units on a scale Standard Deviation 5.33	2.2 units on a scale Standard Deviation 5.39	0.6 units on a scale Standard Deviation 3.76

SECONDARY outcome

Timeframe: Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Population: Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=18 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=15 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=19 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) Discontinuation Week 1 (n=15,19,18)	14.1 units on a scale Standard Deviation 10.31	—	18.1 units on a scale Standard Deviation 7.11	19.0 units on a scale Standard Deviation 7.61	—	—
Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) Discontinuation Week 2 (n=14,15,16)	14.6 units on a scale Standard Deviation 10.41	—	13.9 units on a scale Standard Deviation 7.33	18.6 units on a scale Standard Deviation 6.15	—	—

SECONDARY outcome

Timeframe: Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Population: Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=48 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=58 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) Discontinuation Week 1 (n=58,52,48)	8.8 units on a scale Standard Deviation 5.88	—	9.6 units on a scale Standard Deviation 6.38	9.4 units on a scale Standard Deviation 6.60	—	—
Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) Discontinuation Week 2 (n=54,49,44)	8.3 units on a scale Standard Deviation 6.48	—	9.0 units on a scale Standard Deviation 6.44	9.9 units on a scale Standard Deviation 7.04	—	—

SECONDARY outcome

Timeframe: Week 1, 2 post-treatment discontinuation (discontinuation [DC] occurred after Week 15 to Week 24)

Population: Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=94 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=28 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=109 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=30 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=99 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=30 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Hamilton Anxiety Scale (HAM-A) Score for Cohort 3 (6-Month Last Visit) Discontinuation Week 1 (n=109,30,94,28,99,30)	6.3 units on a scale Standard Deviation 5.48	8.4 units on a scale Standard Deviation 6.67	7.9 units on a scale Standard Deviation 6.34	5.5 units on a scale Standard Deviation 4.85	8.4 units on a scale Standard Deviation 7.07	7.07 units on a scale Standard Deviation 4.92
Hamilton Anxiety Scale (HAM-A) Score for Cohort 3 (6-Month Last Visit) Discontinuation Week 2 (n=107,29,84,26,94,30)	6.5 units on a scale Standard Deviation 6.36	9.2 units on a scale Standard Deviation 8.28	8.9 units on a scale Standard Deviation 7.60	5.0 units on a scale Standard Deviation 4.32	7.9 units on a scale Standard Deviation 6.27	6.1 units on a scale Standard Deviation 6.00

SECONDARY outcome

Timeframe: Baseline, Week 12

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. Last observation carried forward (LOCF) method was used to impute missing values.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=188 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=197 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=183 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Hamilton Anxiety Scale (HAM-A) Score for Period 1 Baseline	24.5 units on a scale Standard Deviation 4.39	—	25.3 units on a scale Standard Deviation 4.39	24.9 units on a scale Standard Deviation 3.87	—	—
Hamilton Anxiety Scale (HAM-A) Score for Period 1 Week 12	7.9 units on a scale Standard Deviation 6.70	—	8.0 units on a scale Standard Deviation 6.23	8.9 units on a scale Standard Deviation 7.19	—	—

SECONDARY outcome

Timeframe: Baseline, Week 24

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=103 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=37 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=117 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=37 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=106 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=37 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Hamilton Anxiety Scale (HAM-A) Score for Period 2 Baseline	24.8 units on a scale Standard Deviation 3.77	25.1 units on a scale Standard Deviation 3.92	25.6 units on a scale Standard Deviation 3.82	24.6 units on a scale Standard Deviation 4.66	24.7 units on a scale Standard Deviation 4.41	24.1 units on a scale Standard Deviation 4.03
Hamilton Anxiety Scale (HAM-A) Score for Period 2 Week 24	6.5 units on a scale Standard Deviation 5.98	10.2 units on a scale Standard Deviation 7.49	7.0 units on a scale Standard Deviation 6.53	7.1 units on a scale Standard Deviation 7.09	5.7 units on a scale Standard Deviation 6.06	6.6 units on a scale Standard Deviation 6.33

SECONDARY outcome

Timeframe: Baseline, Week 12

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=185 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=194 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=180 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Hamilton Anxiety Scale (HAM-A) Score at Week 12	-16.7 units on a scale Standard Deviation 7.92	—	-17.4 units on a scale Standard Deviation 7.39	-16.0 units on a scale Standard Deviation 7.45	—	—

SECONDARY outcome

Timeframe: Baseline, Week 24

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=103 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=37 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=117 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=37 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=106 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=37 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Hamilton Anxiety Scale (HAM-A) Score at Week 24	-18.2 units on a scale Standard Deviation 6.59	-14.9 units on a scale Standard Deviation 7.85	-18.7 units on a scale Standard Deviation 7.33	-17.5 units on a scale Standard Deviation 6.89	-19.0 units on a scale Standard Deviation 7.24	-17.5 units on a scale Standard Deviation 8.34

SECONDARY outcome

Timeframe: Baseline, Week 12

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=188 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=197 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=183 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Clinical Global Impression - Severity (CGI-S) Score for Period 1 Baseline	4.4 units on a scale Standard Deviation 0.65	—	4.6 units on a scale Standard Deviation 0.68	4.5 units on a scale Standard Deviation 0.71	—	—
Clinical Global Impression - Severity (CGI-S) Score for Period 1 Week 12	2.3 units on a scale Standard Deviation 1.00	—	2.3 units on a scale Standard Deviation 1.06	2.5 units on a scale Standard Deviation 1.17	—	—

SECONDARY outcome

Timeframe: Baseline, Week 24

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=103 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=37 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=117 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=37 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=106 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=37 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Clinical Global Impression - Severity (CGI-S) Score for Period 2 Baseline	4.5 units on a scale Standard Deviation 0.71	4.5 units on a scale Standard Deviation 0.73	4.7 units on a scale Standard Deviation 0.65	4.5 units on a scale Standard Deviation 0.69	4.4 units on a scale Standard Deviation 0.68	4.5 units on a scale Standard Deviation 0.56
Clinical Global Impression - Severity (CGI-S) Score for Period 2 Week 24	2.1 units on a scale Standard Deviation 0.97	2.5 units on a scale Standard Deviation 1.24	2.3 units on a scale Standard Deviation 1.08	2.2 units on a scale Standard Deviation 1.16	1.9 units on a scale Standard Deviation 0.90	2.4 units on a scale Standard Deviation 0.98

SECONDARY outcome

Timeframe: Baseline, Week 12

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. Here, 'N' (Number of Participants Analyzed) signifies those participants who were evaluable for this measure. LOCF method was used to impute missing values.

CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=186 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=195 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=181 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Clinical Global Impression - Severity (CGI-S) Score at Week 12	-2.1 units on a scale Standard Deviation 1.17	—	-2.3 units on a scale Standard Deviation 1.13	-2.1 units on a scale Standard Deviation 1.13	—	—

SECONDARY outcome

Timeframe: Baseline, Week 24

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=103 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=37 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=117 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=37 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=106 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=37 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Change From Baseline in Clinical Global Impression - Severity (CGI-S) Score at Week 24	-2.4 units on a scale Standard Deviation 1.04	-2.0 units on a scale Standard Deviation 1.27	-2.4 units on a scale Standard Deviation 1.13	-2.3 units on a scale Standard Deviation 1.24	-2.5 units on a scale Standard Deviation 1.11	-2.2 units on a scale Standard Deviation 1.17

SECONDARY outcome

Timeframe: Week 12

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

CGI-I: 7-point clinician rated scale ranging from 1 (very much improved) to 7 (very much worse). Improvement is defined as a score of 1 (very much improved), 2 (much improved), or 3 (minimally improved) on the scale.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=188 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=197 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=183 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Clinical Global Impression - Improvement (CGI-I) Score at the End of Period 1	1.9 units on a scale Standard Deviation 1.17	—	1.9 units on a scale Standard Deviation 1.13	1.9 units on a scale Standard Deviation 1.01	—	—

SECONDARY outcome

Timeframe: Week 24

Population: Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

CGI-I: 7-point clinician rated scale ranging from 1 (very much improved) to 7 (very much worse). Improvement is defined as a score of 1 (very much improved), 2 (much improved), or 3 (minimally improved) on the scale.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=103 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=37 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=117 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=37 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=106 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=37 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Clinical Global Impression - Improvement (CGI-I) Score at the End of Period 2	1.6 units on a scale Standard Deviation 0.75	2.3 units on a scale Standard Deviation 1.53	1.7 units on a scale Standard Deviation 0.99	1.9 units on a scale Standard Deviation 1.15	1.5 units on a scale Standard Deviation 0.91	2.0 units on a scale Standard Deviation 1.07

OTHER_PRE_SPECIFIED outcome

Timeframe: Baseline up to Week 24

Population: Data was not statistically summarized but was available in individual participant listings and mapped to Columbia Classification Algorithm of Suicide Assessment (C-CASA) due to change in planned analysis.

Sheehan-Suicidality Tracking Scale (S-STS): an 8-item prospective rating scale that tracked treatment-emergent suicidal ideation and behaviors. Items 1a, 2-6, 7a, and 8 were scored on a 5-point Likert scale (ranging from 0= not at all to 4=extremely). Items 1, 1b, and 7 required yes or no responses. Total score ranged from 0 to 35, higher score indicated higher suicidal tendency.

Outcome measures

Outcome data not reported

OTHER_PRE_SPECIFIED outcome

Timeframe: Baseline up to Week 12 (period 1), Week 13 up to Week 24 (period 2)

Population: Safety analysis set: all randomized participants who received at least 1 dose of study medication. Here, 'n' signifies those participants who were evaluable for this measure during each specified period, for each group respectively.

An AE was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. Treatment-emergent are events between first dose of study drug and Week 12, for period 1, and between Week 13 and Week 24, for period 2, that were absent before treatment or that worsened relative to pretreatment state.

Outcome measures

Measure	Pregabalin Low Dose, Pregabalin Low Dose n=154 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose n=154 Participants Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Pregabalin Low Dose n=52 Participants Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Lorazepam, Lorazepam n=153 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=50 Participants Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Number of Participants With Treatment-Emergent Adverse Events (AEs) Period 1 (n=154,52,154,52,153,50)	100 participants	40 participants	103 participants	37 participants	95 participants	35 participants
Number of Participants With Treatment-Emergent Adverse Events (AEs) Period 2 (n=121,39,112,38,114,39)	62 participants	18 participants	62 participants	26 participants	52 participants	20 participants

Adverse Events

Pregabalin High Dose, Pregabalin High Dose

Serious events: 2 serious events

Other events: 110 other events

Deaths: 0 deaths

Pregabalin High Dose, Placebo

Serious events: 0 serious events

Other events: 40 other events

Deaths: 0 deaths

Pregabalin Low Dose, Pregabalin Low Dose

Serious events: 5 serious events

Other events: 108 other events

Deaths: 0 deaths

Pregabalin Low Dose, Placebo

Serious events: 2 serious events

Other events: 38 other events

Deaths: 0 deaths

Lorazepam, Lorazepam

Serious events: 4 serious events

Other events: 100 other events

Deaths: 0 deaths

Lorazepam, Placebo

Serious events: 0 serious events

Other events: 35 other events

Deaths: 0 deaths

Serious adverse events

Measure	Pregabalin High Dose, Pregabalin High Dose n=154 participants at risk Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose, Placebo n=52 participants at risk Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Pregabalin Low Dose n=154 participants at risk Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=52 participants at risk Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Lorazepam n=153 participants at risk Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=50 participants at risk Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Cardiac disorders Myocardial infarction	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Cardiac disorders Myocardial ischaemia	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Gastrointestinal disorders Abdominal hernia	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Gastrointestinal disorders Food poisoning	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Gastrointestinal disorders Inguinal hernia	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Infections and infestations Infection	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Infections and infestations Typhoid fever	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Injury, poisoning and procedural complications Subdural haematoma	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Metabolism and nutrition disorders Diabetes mellitus inadequate control	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Metabolism and nutrition disorders Hyperglycaemia	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Metabolism and nutrition disorders Ketoacidosis	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Neoplasms benign, malignant and unspecified (incl cysts and polyps) Metastasis	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Nervous system disorders Cerebral haemorrhage	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Psychiatric disorders Anxiety	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Psychiatric disorders Depression	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Psychiatric disorders Generalised anxiety disorder	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Psychiatric disorders Suicidal ideation	0.00% 0/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.

Other adverse events

Measure	Pregabalin High Dose, Pregabalin High Dose n=154 participants at risk Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin High Dose, Placebo n=52 participants at risk Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Pregabalin Low Dose n=154 participants at risk Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Pregabalin Low Dose, Placebo n=52 participants at risk Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Lorazepam n=153 participants at risk Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Lorazepam, Placebo n=50 participants at risk Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Ear and labyrinth disorders Vertigo	2.6% 4/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.2% 5/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	7.7% 4/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.0% 3/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.0% 1/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Gastrointestinal disorders Abdominal pain	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.3% 2/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.8% 3/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Gastrointestinal disorders Constipation	6.5% 10/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.6% 4/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.8% 2/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.3% 2/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.0% 1/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Gastrointestinal disorders Diarrhoea	6.5% 10/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.8% 3/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.2% 8/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	9.6% 5/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.9% 9/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.0% 1/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Gastrointestinal disorders Dry mouth	8.4% 13/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.8% 3/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.2% 5/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.8% 2/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.2% 8/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	8.0% 4/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Gastrointestinal disorders Nausea	11.0% 17/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	13.5% 7/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	7.8% 12/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	15.4% 8/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	11.8% 18/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	14.0% 7/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
General disorders Fatigue	10.4% 16/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	11.5% 6/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	9.7% 15/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	21.2% 11/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	9.8% 15/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	10.0% 5/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
General disorders Irritability	3.9% 6/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.6% 4/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.8% 2/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.2% 8/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.0% 1/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Infections and infestations Influenza	5.2% 8/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.8% 3/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	4.5% 7/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	4.6% 7/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Infections and infestations Nasopharyngitis	8.4% 13/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.8% 2/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	4.5% 7/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	9.6% 5/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.2% 8/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	8.0% 4/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Investigations Weight increased	3.2% 5/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	4.5% 7/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.8% 3/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.6% 4/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Metabolism and nutrition disorders Decreased appetite	3.9% 6/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 3/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	7.7% 4/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.9% 6/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	6.0% 3/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Musculoskeletal and connective tissue disorders Arthralgia	2.6% 4/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 3/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.0% 3/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	6.0% 3/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Musculoskeletal and connective tissue disorders Back pain	5.8% 9/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.6% 4/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	4.0% 2/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Musculoskeletal and connective tissue disorders Myalgia	3.2% 5/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	7.7% 4/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.6% 4/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.8% 2/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.9% 9/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.0% 1/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Nervous system disorders Disturbance in attention	7.8% 12/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 3/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.8% 2/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.9% 6/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.0% 1/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Nervous system disorders Dizziness	24.0% 37/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	32.7% 17/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	18.2% 28/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	26.9% 14/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	13.1% 20/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	20.0% 10/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Nervous system disorders Headache	24.7% 38/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	25.0% 13/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	23.4% 36/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	32.7% 17/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	21.6% 33/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	20.0% 10/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Nervous system disorders Paraesthesia	3.9% 6/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 3/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.8% 3/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.3% 5/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	4.0% 2/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Nervous system disorders Sedation	3.9% 6/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.8% 2/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.2% 5/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	6.5% 10/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.0% 1/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Nervous system disorders Somnolence	16.2% 25/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	13.5% 7/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	20.1% 31/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	17.3% 9/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	22.9% 35/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	26.0% 13/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Nervous system disorders Tremor	3.2% 5/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.8% 2/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.8% 3/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.9% 6/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Psychiatric disorders Anxiety	9.1% 14/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	11.5% 6/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	6.5% 10/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	12.4% 19/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	10.0% 5/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Psychiatric disorders Generalised anxiety disorder	2.6% 4/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.8% 2/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	5.8% 9/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.8% 2/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	3.9% 6/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	4.0% 2/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Psychiatric disorders Insomnia	20.1% 31/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	28.8% 15/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	15.6% 24/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	23.1% 12/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	15.0% 23/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	26.0% 13/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Psychiatric disorders Tension	5.2% 8/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.6% 4/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.3% 2/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	2.0% 1/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.
Respiratory, thoracic and mediastinal disorders Cough	0.65% 1/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.9% 1/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.3% 2/154 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	0.00% 0/52 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	1.3% 2/153 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.	8.0% 4/50 The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.

Additional Information

Pfizer ClinicalTrials.gov Call Center

Pfizer, Inc.

Phone: 1-800-718-1021

Email: ClinicalTrials.gov_Inquiries@pfizer.com

Results disclosure agreements

• Principal investigator is a sponsor employee Pfizer has the right to review disclosures, requesting a delay of less than 60 days. Investigator will postpone single center publications until after disclosure of pooled data (all sites), less than 12 months from study completion/termination at all participating sites. Investigator may not disclose previously undisclosed confidential information other than study results.
• Publication restrictions are in place

Restriction type: OTHER