Effects of Aripiprazole on Cocaine Craving and Self-Administration
The purpose of this study is to investigate whether aripiprazole will decrease cocaine self-administration, subjective effects and cravings compared to placebo.
|Study Design:||Allocation: Non-Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Single Blind
Primary Purpose: Treatment
|Official Title:||Effects of Aripiprazole on Cocaine Craving and Self-Administration|
|Study Start Date:||April 2005|
|Estimated Study Completion Date:||August 2008|
Despite the recent increase in data about cocaine's basic neurochemical mechanisms of action, progress towards the development of an effective pharmacological treatment for cocaine abuse has been disappointing. We are proposing to use our laboratory model of repeated dose cocaine self-administration to assess the potential efficacy of the novel antipsychotic, aripiprazole. Aripiprazole is a partial agonist at both the dopamine D2 receptor and at the serotonin 5HT1a receptor, while antagonizing the 5HT2a receptor. By functioning as a partial D2 agonist, aripiprazole is hypothesized to function as a D2 antagonist during hypodopaminergic states, such as during cocaine use, while functioning as a D2 agonist during hypodopaminergic states, such as during cocaine withdrawal. This 42-day, outpatient/inpatient/outpatient/inpatient protocol will evaluate the effects of aripiprazole maintenance (0, 15 mg/day) on cocaine craving, subjective effects, and self-administration using a within-subjects design. Non-treatment seeking cocaine abusers will be maintained outpatient for 16 days of dose maintenance prior to inpatient cocaine self-administration sessions. During the inpatient phases, volunteers will live on a hospital clinical research unit and will participate in laboratory sessions in which they will have the opportunity to choose between repeated doses of smoked cocaine and $5. In addition to measuring their cocaine self-administration, we will measure the cardiovascular and subjective effects of cocaine under each aripiprazole maintenance condition.
|United States, New York|
|Irving Center for Clinical Research|
|New York, New York, United States, 10032|
|Principal Investigator:||Margaret Haney, Ph.D.||New York State Psychiatric Institute|