Trial Outcomes & Findings for Efficacy and Safety of Elagolix in Combination With Estradiol/Norethindrone Acetate for the Management of Heavy Menstrual Bleeding Associated With Uterine Fibroids in Premenopausal Women (NCT NCT02654054)

NCT ID: NCT02654054

Last Updated: 2020-06-29

Results Overview

Percentage of responders, defined as participants who met the following conditions: * Menstrual blood loss (MBL) volume \< 80 mL during the Final Month (the last 28 days prior to and including the Reference Day, which is defined as the last visit date during the Treatment Period \[last treatment visit date\] or the last dose date if there are evaluable alkaline hematin data after the last treatment visit date and prior to or on the last dose date), and * ≥ 50% reduction in MBL volume from Baseline to the Final Month. Participants who prematurely discontinued study drug due to "lack of efficacy," "requires surgery or invasive intervention for treatment of uterine fibroids," or "adverse events" were considered non-responders regardless of whether she meets the two aforementioned responder criteria or not.

Recruitment status

COMPLETED

Study phase

PHASE3

Target enrollment

413 participants

Primary outcome timeframe

Final Month (the last 28 days prior to and including the Reference Day), up to Month 6

Results posted on

2020-06-29

Participant Flow

Eligible participants were randomized in a 1:1:2 ratio to 1 of 3 treatment groups: placebo, elagolix 300 mg BID, or elagolix 300 mg twice daily (BID) plus estradiol/norethindrone acetate (E2/NETA) once daily (QD).

Participant milestones

Participant milestones
Measure
Placebo
Placebo for both elagolix BID and E2/NETA QD
Elagolix
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2/NETA
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Treatment Period
STARTED
102
104
207
Treatment Period
Randomized and Treated
102
104
206
Treatment Period
COMPLETED
83
81
164
Treatment Period
NOT COMPLETED
19
23
43
Post-Treatment Follow-Up Period
STARTED
25
32
59
Post-Treatment Follow-Up Period
COMPLETED
17
24
29
Post-Treatment Follow-Up Period
NOT COMPLETED
8
8
30

Reasons for withdrawal

Reasons for withdrawal
Measure
Placebo
Placebo for both elagolix BID and E2/NETA QD
Elagolix
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2/NETA
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Post-Treatment Follow-Up Period
Withdrawal by Subject
2
6
7
Post-Treatment Follow-Up Period
Lost to Follow-up
3
0
13
Post-Treatment Follow-Up Period
Required Surgery/Invasive Intervention
2
2
2
Post-Treatment Follow-Up Period
Other
1
0
4
Post-Treatment Follow-Up Period
Non-Compliance
0
0
4

Baseline Characteristics

Efficacy and Safety of Elagolix in Combination With Estradiol/Norethindrone Acetate for the Management of Heavy Menstrual Bleeding Associated With Uterine Fibroids in Premenopausal Women

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Placebo
n=102 Participants
Placebo for both elagolix BID and E2/NETA QD
Elagolix
n=104 Participants
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2/NETA
n=206 Participants
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Total
n=412 Participants
Total of all reporting groups
Age, Continuous
41.6 years
STANDARD_DEVIATION 5.68 • n=5 Participants
42.6 years
STANDARD_DEVIATION 5.16 • n=7 Participants
42.6 years
STANDARD_DEVIATION 5.30 • n=5 Participants
42.3 years
STANDARD_DEVIATION 5.37 • n=4 Participants
Sex: Female, Male
Female
102 Participants
n=5 Participants
104 Participants
n=7 Participants
206 Participants
n=5 Participants
412 Participants
n=4 Participants
Sex: Female, Male
Male
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
19 Participants
n=5 Participants
4 Participants
n=7 Participants
34 Participants
n=5 Participants
57 Participants
n=4 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
83 Participants
n=5 Participants
100 Participants
n=7 Participants
172 Participants
n=5 Participants
355 Participants
n=4 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
0 Participants
n=7 Participants
2 Participants
n=5 Participants
2 Participants
n=4 Participants
Race (NIH/OMB)
Asian
1 Participants
n=5 Participants
2 Participants
n=7 Participants
3 Participants
n=5 Participants
6 Participants
n=4 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
1 Participants
n=7 Participants
0 Participants
n=5 Participants
1 Participants
n=4 Participants
Race (NIH/OMB)
Black or African American
70 Participants
n=5 Participants
69 Participants
n=7 Participants
141 Participants
n=5 Participants
280 Participants
n=4 Participants
Race (NIH/OMB)
White
30 Participants
n=5 Participants
27 Participants
n=7 Participants
59 Participants
n=5 Participants
116 Participants
n=4 Participants
Race (NIH/OMB)
More than one race
1 Participants
n=5 Participants
4 Participants
n=7 Participants
1 Participants
n=5 Participants
6 Participants
n=4 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
1 Participants
n=7 Participants
0 Participants
n=5 Participants
1 Participants
n=4 Participants

PRIMARY outcome

Timeframe: Final Month (the last 28 days prior to and including the Reference Day), up to Month 6

Population: All randomized and treated participants.

Percentage of responders, defined as participants who met the following conditions: * Menstrual blood loss (MBL) volume \< 80 mL during the Final Month (the last 28 days prior to and including the Reference Day, which is defined as the last visit date during the Treatment Period \[last treatment visit date\] or the last dose date if there are evaluable alkaline hematin data after the last treatment visit date and prior to or on the last dose date), and * ≥ 50% reduction in MBL volume from Baseline to the Final Month. Participants who prematurely discontinued study drug due to "lack of efficacy," "requires surgery or invasive intervention for treatment of uterine fibroids," or "adverse events" were considered non-responders regardless of whether she meets the two aforementioned responder criteria or not.

Outcome measures

Outcome measures
Measure
Placebo
n=102 Participants
Placebo for both elagolix BID and E2/NETA QD
Elagolix
n=104 Participants
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2/NETA
n=206 Participants
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Percentage of Participants Meeting the Criteria for Responder
8.7 percentage of participants
84.1 percentage of participants
68.5 percentage of participants

SECONDARY outcome

Timeframe: Month 0 (Baseline), Final Month (the last 28 days prior to and including the Reference Day), up to Month 6

Population: All randomized and treated participants.

Baseline MBL volume was defined as the mean of total MBL volume from all the qualified menstrual cycles during the Screening Period, in which the total MBL volume is from all validated and non-validated sanitary products and the MBL volume of validated sanitary products only (excluding non-validated sanitary products) was greater than 80 mL. The Reference Day is defined as the last visit date during the Treatment Period (last treatment visit date) or the last dose date if there are evaluable alkaline hematin data after the last treatment visit date and prior to or on the last dose date.

Outcome measures

Outcome measures
Measure
Placebo
n=102 Participants
Placebo for both elagolix BID and E2/NETA QD
Elagolix
n=104 Participants
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2/NETA
n=206 Participants
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Change From Baseline in MBL Volume to the Final Month
0.8 mL
Standard Error 14.86
-221.5 mL
Standard Error 14.49
-176.7 mL
Standard Error 10.40

SECONDARY outcome

Timeframe: Final Month (the last 28 days prior to and including the Reference Day), up to Month 6

Population: All randomized and treated participants with an assessment

Suppression of bleeding is defined as having 0 days of bleeding (spotting is allowed) during the Final Month with the interval starting from Study Day 11. The Reference Day is defined as the last visit date during the Treatment Period (last treatment visit date) or the last dose date if there are evaluable alkaline hematin data after the last treatment visit date and prior to or on the last dose date.

Outcome measures

Outcome measures
Measure
Placebo
n=91 Participants
Placebo for both elagolix BID and E2/NETA QD
Elagolix
n=94 Participants
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2/NETA
n=183 Participants
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Percentage of Participants With Suppression of Bleeding at the Final Month
4.4 percentage of participants
84.0 percentage of participants
56.8 percentage of participants

SECONDARY outcome

Timeframe: Month 0 (Baseline), Month 6

Population: All randomized and treated participants with an assessment at given time point.

Outcome measures

Outcome measures
Measure
Placebo
n=71 Participants
Placebo for both elagolix BID and E2/NETA QD
Elagolix
n=67 Participants
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2/NETA
n=132 Participants
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Change From Baseline in MBL Volume to Month 6
-2.3 mL
Standard Error 13.53
-236.2 mL
Standard Error 13.74
-194.7 mL
Standard Error 9.77

SECONDARY outcome

Timeframe: Month 0 (Baseline), Month 3

Population: All randomized and treated participants with an assessment at given time point.

Outcome measures

Outcome measures
Measure
Placebo
n=85 Participants
Placebo for both elagolix BID and E2/NETA QD
Elagolix
n=83 Participants
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2/NETA
n=172 Participants
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Change From Baseline in MBL Volume to Month 3
6.1 mL
Standard Error 15.32
-234.7 mL
Standard Error 15.38
-192.2 mL
Standard Error 10.81

SECONDARY outcome

Timeframe: Month 0 (Baseline), Month 6

Population: All randomized and treated participants with baseline hemoglobin \<= 10.5 g/dL and an assessment at Month 6.

Outcome measures

Outcome measures
Measure
Placebo
n=31 Participants
Placebo for both elagolix BID and E2/NETA QD
Elagolix
n=41 Participants
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2/NETA
n=52 Participants
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Percentage of Participants With Baseline Hemoglobin <= 10.5 g/dL Who Have an Increase in Hemoglobin > 2 g/dL at Month 6
16.1 percentage of participants
65.9 percentage of participants
61.5 percentage of participants

SECONDARY outcome

Timeframe: Month 0 (Baseline), Month 1

Population: All randomized and treated participants with an assessment at given time point.

Outcome measures

Outcome measures
Measure
Placebo
n=95 Participants
Placebo for both elagolix BID and E2/NETA QD
Elagolix
n=97 Participants
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2/NETA
n=187 Participants
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Change From Baseline in MBL Volume to Month 1
-19.0 mL
Standard Error 16.05
-209.0 mL
Standard Error 15.91
-135.2 mL
Standard Error 11.41

Adverse Events

Placebo

Serious events: 5 serious events
Other events: 29 other events
Deaths: 0 deaths

Elagolix

Serious events: 3 serious events
Other events: 81 other events
Deaths: 0 deaths

Elagolix + E2-NETA

Serious events: 3 serious events
Other events: 96 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Placebo
n=102 participants at risk
Placebo for both elagolix BID and E2/NETA QD
Elagolix
n=104 participants at risk
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2-NETA
n=206 participants at risk
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Blood and lymphatic system disorders
ANAEMIA
2.0%
2/102 • Number of events 2 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/104 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/206 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
General disorders
PROLAPSE
0.00%
0/102 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.96%
1/104 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/206 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Investigations
OXYGEN SATURATION DECREASED
0.98%
1/102 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/104 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/206 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Musculoskeletal and connective tissue disorders
EXOSTOSIS
0.00%
0/102 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/104 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.49%
1/206 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Musculoskeletal and connective tissue disorders
INTERVERTEBRAL DISC PROTRUSION
0.00%
0/102 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/104 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.49%
1/206 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Musculoskeletal and connective tissue disorders
OSTEOARTHRITIS
0.98%
1/102 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/104 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/206 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
UTERINE LEIOMYOMA
0.00%
0/102 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
1.9%
2/104 • Number of events 2 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/206 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Pregnancy, puerperium and perinatal conditions
ABORTION SPONTANEOUS
0.00%
0/102 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.96%
1/104 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/206 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Pregnancy, puerperium and perinatal conditions
ECTOPIC PREGNANCY
0.00%
0/102 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.96%
1/104 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/206 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Psychiatric disorders
SUICIDAL IDEATION
0.98%
1/102 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/104 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/206 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Reproductive system and breast disorders
MENORRHAGIA
0.98%
1/102 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.96%
1/104 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/206 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Respiratory, thoracic and mediastinal disorders
DYSPNOEA EXERTIONAL
0.98%
1/102 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/104 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/206 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Skin and subcutaneous tissue disorders
DERMATITIS
0.00%
0/102 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/104 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.49%
1/206 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Skin and subcutaneous tissue disorders
PALMOPLANTAR KERATODERMA
0.00%
0/102 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.00%
0/104 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.49%
1/206 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.

Other adverse events

Other adverse events
Measure
Placebo
n=102 participants at risk
Placebo for both elagolix BID and E2/NETA QD
Elagolix
n=104 participants at risk
Elagolix 300 mg BID and placebo for E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Elagolix + E2-NETA
n=206 participants at risk
Elagolix 300 mg BID and E2/NETA (estradiol 1.0 mg/norethindrone acetate 0.5 mg) QD
Gastrointestinal disorders
NAUSEA
9.8%
10/102 • Number of events 10 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
6.7%
7/104 • Number of events 7 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
11.2%
23/206 • Number of events 26 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
General disorders
FATIGUE
2.0%
2/102 • Number of events 2 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.96%
1/104 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
6.8%
14/206 • Number of events 14 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Infections and infestations
NASOPHARYNGITIS
3.9%
4/102 • Number of events 5 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
5.8%
6/104 • Number of events 6 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
4.9%
10/206 • Number of events 12 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Nervous system disorders
HEADACHE
8.8%
9/102 • Number of events 11 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
16.3%
17/104 • Number of events 20 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
8.3%
17/206 • Number of events 18 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Psychiatric disorders
INSOMNIA
5.9%
6/102 • Number of events 6 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
6.7%
7/104 • Number of events 7 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
2.4%
5/206 • Number of events 5 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Psychiatric disorders
MOOD SWINGS
2.0%
2/102 • Number of events 2 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
6.7%
7/104 • Number of events 7 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
3.9%
8/206 • Number of events 8 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Reproductive system and breast disorders
DYSMENORRHOEA
3.9%
4/102 • Number of events 4 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.96%
1/104 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
6.3%
13/206 • Number of events 13 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Reproductive system and breast disorders
METRORRHAGIA
0.00%
0/102 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
0.96%
1/104 • Number of events 1 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
6.3%
13/206 • Number of events 13 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Skin and subcutaneous tissue disorders
NIGHT SWEATS
2.9%
3/102 • Number of events 3 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
26.9%
28/104 • Number of events 31 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
6.8%
14/206 • Number of events 15 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
Vascular disorders
HOT FLUSH
8.8%
9/102 • Number of events 10 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
64.4%
67/104 • Number of events 72 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.
20.4%
42/206 • Number of events 44 • From first dose of study drug through 6 months of treatment with a 30-day follow-up period for participants who did not enroll in the extension study (Study M12-816). Mean (SD) treatment exposure was 158.6 (50.10), 161.2 (51.45), and 159.9 (53.48) days for the Placebo, Elagolix, and Elagolix and E2-NETA arms, respectively.
Treatment-emergent adverse events are presented.

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