Trial Outcomes & Findings for Studying Amphetamine Withdrawal in Humans (NCT NCT01215929)

Last Updated: 2014-08-04

Results Overview

Total score on the Methamphetamine Withdrawal Assessment scale (MAWA) based on DSMIV criteria for amphetamine withdrawal. This questionnaire is comprised of 13 items which describe symptoms associated with the cessation of chronic amphetamine use for which participants indicate severity on a 4-point scale. The minimum score indicating no methamphetamine withdrawal symptoms is 0 and the maximum score is 4 indicating that a patient has the most severe withdrawal symptom related to that question. The subscales are the 13 questions and the total score is the sum of all the scores for the 13 items on the scale. The range minium and better outcome is a lower score. The range is from 0-52. The worse outcome is reflected in a higher score.

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

35 participants

Primary outcome timeframe

at the end of week 4

Results posted on

2014-08-04

Participant Flow

Participant milestones

Participant milestones
Measure	Dextroamphetamine Dextroamphetamine: Thirty-five treatment-seeking methamphetamine dependent volunteers were admitted to a residential facility and inducted onto d-amphetamine during week 1 of the study. 18 Participants were be randomized by severity of methamphetamine dependence, sex, amphetamine withdrawal questionnaire score and history of Attention Deficit Hyperactivity Disorder to receive oral d-amphetamine at a dose of 30 mg twice daily for 2 weeks.	Placebo Placebo: Thirty-four treatment-seeking methamphetamine dependent volunteers will be admitted to a residential facility in this 4-week, double-blind, placebo-controlled, clinical trial and be inducted onto d-amphetamine during week 1 of the study. 17 Participants were randomized by severity of methamphetamine dependence, sex, amphetamine withdrawal questionnaire score and history of Attention Deficit Hyperactivity Disorder to receive oral placebo tablets twice daily for 2 weeks.
Overall Study STARTED	18	17
Overall Study COMPLETED	12	12
Overall Study NOT COMPLETED	6	5

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

Studying Amphetamine Withdrawal in Humans

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure	Dextroamphetamine n=18 Participants Dextroamphetamine: Thirty-five treatment-seeking methamphetamine dependent volunteers were admitted to a residential facility and inducted onto d-amphetamine during week 1 of the study. 18 Participants were be randomized by severity of methamphetamine dependence, sex, amphetamine withdrawal questionnaire score and history of Attention Deficit Hyperactivity Disorder to receive oral d-amphetamine at a dose of 30 mg twice daily for 2 weeks.	Placebo n=17 Participants Placebo: Thirty-four treatment-seeking methamphetamine dependent volunteers will be admitted to a residential facility in this 4-week, double-blind, placebo-controlled, clinical trial and be inducted onto d-amphetamine during week 1 of the study. 17 Participants were randomized by severity of methamphetamine dependence, sex, amphetamine withdrawal questionnaire score and history of Attention Deficit Hyperactivity Disorder to receive oral placebo tablets twice daily for 2 weeks.	Total n=35 Participants Total of all reporting groups
Age, Continuous	41.00 years STANDARD_DEVIATION 9.76 • n=5 Participants	33.67 years STANDARD_DEVIATION 6.34 • n=7 Participants	35.36 years STANDARD_DEVIATION 8.86 • n=5 Participants
Sex: Female, Male Female	9 Participants n=5 Participants	9 Participants n=7 Participants	18 Participants n=5 Participants
Sex: Female, Male Male	9 Participants n=5 Participants	8 Participants n=7 Participants	17 Participants n=5 Participants
Race (NIH/OMB) American Indian or Alaska Native	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Asian	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Native Hawaiian or Other Pacific Islander	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Black or African American	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) White	18 Participants n=5 Participants	17 Participants n=7 Participants	35 Participants n=5 Participants
Race (NIH/OMB) More than one race	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Unknown or Not Reported	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Region of Enrollment United States	18 participants n=5 Participants	17 participants n=7 Participants	35 participants n=5 Participants

PRIMARY outcome

Timeframe: at the end of week 4

Outcome measures

Outcome measures
Measure	Dextroamphetamine n=12 Participants Dextroamphetamine: Thirty-five treatment-seeking methamphetamine dependent volunteers were admitted to a residential facility and inducted onto d-amphetamine during week 1 of the study. 18 Participants were be randomized by severity of methamphetamine dependence, sex, amphetamine withdrawal questionnaire score and history of Attention Deficit Hyperactivity Disorder to receive oral d-amphetamine at a dose of 30 mg twice daily for 2 weeks.	Placebo n=12 Participants Placebo: Thirty-five treatment-seeking methamphetamine dependent volunteers will be admitted to a residential facility in this 4-week, double-blind, placebo-controlled, clinical trial and be inducted onto d-amphetamine during week 1 of the study. 17 Participants were randomized by severity of methamphetamine dependence, sex, amphetamine withdrawal questionnaire score and history of Attention Deficit Hyperactivity Disorder to receive oral placebo tablets twice daily for 2 weeks.
Measure of Methamphetamine Withdrawal	3.7283 units on a scale Standard Error 3.37	10.056 units on a scale Standard Error 3.45

Adverse Events

Dextroamphetamine

Serious events: 0 serious events

Other events: 8 other events

Deaths: 0 deaths

Placebo

Serious events: 0 serious events

Other events: 9 other events

Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Other adverse events
Measure	Dextroamphetamine n=18 participants at risk Dextroamphetamine: Thirty-five treatment-seeking methamphetamine dependent volunteers were admitted to a residential facility and inducted onto d-amphetamine during week 1 of the study. 18 Participants were be randomized by severity of methamphetamine dependence, sex, amphetamine withdrawal questionnaire score and history of Attention Deficit Hyperactivity Disorder to receive oral d-amphetamine at a dose of 30 mg twice daily for 2 weeks.	Placebo n=17 participants at risk Placebo: Thirty-four treatment-seeking methamphetamine dependent volunteers will be admitted to a residential facility in this 4-week, double-blind, placebo-controlled, clinical trial and be inducted onto d-amphetamine during week 1 of the study. 17 Participants were randomized by severity of methamphetamine dependence, sex, amphetamine withdrawal questionnaire score and history of Attention Deficit Hyperactivity Disorder to receive oral placebo tablets twice daily for 2 weeks.
Psychiatric disorders Insomnia	16.7% 3/18	11.8% 2/17
Nervous system disorders Headache	11.1% 2/18	17.6% 3/17
Cardiac disorders Tachycardia	16.7% 3/18	35.3% 6/17

Additional Information

Michael J Mancino MD

UAMS

Phone: 501-526-8440

Email: [email protected]

Results disclosure agreements

Principal investigator is a sponsor employee
Publication restrictions are in place