Conditions: Methamphetamine Abuse HIV
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 76
Healthy volunteers: no

Brief summary:
The purpose of this protocol is to learn more about impulsive decision making in people who use methamphetamines. The investigators would like to know if a medication called naltrexone changes how people make decisions. The investigators would also like to know whether changes in decision making can be observed by MRI (magnetic resonance imaging).

The research is conducted in Portland, OR.

Detailed description:

Arms:
arm 1: One dose of intramuscular injection of 380mg extended-release naltrexone. arm 2: One dose of intramuscular injection of placebo.

Interventions: intervention 1: Extended release naltrexone intervention 2: Placebo
Intervention descriptions: intervention 1: None intervention 2: None

Protocol document: