Effectiveness of Memantine in Treating Cocaine-Dependent Individuals - 2
Cocaine is one of the most widely abused drugs in the United States. Memantine is a type of drug called an NMDA receptor antagonist. It works by decreasing normal excitement in the brain. NMDA receptor antagonists have shown to reduce cocaine-induced dopamine release in animal models, as well as lessen conditioned cocaine cues. The purpose of this study is to determine the effectiveness of memantine in preventing relapse to cocaine use in cocaine dependent individuals. In addition, this study will determine whether memantine produces better results than a placebo in decreasing cocaine craving, psychological symptoms, functional impairment, and discontinuation of treatment in cocaine dependent individuals.
|Study Design:||Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||A Double-Blind, Placebo-Controlled Trial of the Effectiveness of Memantine in Treating Cocaine Dependence|
- Weekly Cocaine Use [ Time Frame: weekly use during length of study participation ] [ Designated as safety issue: No ]Mean number of cocaine using days per week based on self reported use verified by cocaine toxicology results.
- Cocaine Abstinence Based on Daily Self Reported Cocaine Use [ Time Frame: reported weekly cocaine use for 12 weeks/ or study participation ] [ Designated as safety issue: No ]A binary indicator of sustained abstinence, defined as three consecutive weeks of no cocaine use, obtained by self-report and verified using negative urine toxicology results, at any point of the trial;
|Study Start Date:||March 2003|
|Study Completion Date:||May 2007|
|Primary Completion Date:||May 2007 (Final data collection date for primary outcome measure)|
Other Name: Memantine 40mg/day
Placebo Comparator: Placebo
Other Name: Placebo
Memantine is a non-competitive NMDA receptor antagonist that works by decreasing normal excitement in the brain. Dopamine plays a role in the rewarding and addictive properties of cocaine, however, past clinical studies have not been successful in using dopamine agonists in treating cocaine dependent individuals. Non-competitive NMDA receptor antagonists have shown to reduce cocaine-induced dopamine release in animal models and lessen conditioned cocaine cues. This study will evaluate memantine in treating cocaine dependent individuals and its ability to prevent relapse to cocaine use. Specifically, the aim of this study is to determine if memantine is superior to placebo in decreasing cocaine craving, psychological symptoms, functional impairment, and discontinuation of treatment for cocaine abuse.
Participants will enter a 2-week, single-blind, placebo lead-in phase, during which they will visit the clinic three times each week. At each study visit, urine samples and other rating assessments will be collected. In addition, participants will attend weekly therapy sessions. In order to continue in the trial, participants are required to attend at least four out of the first six study visits and both therapy sessions. Eligible participants will then be randomly assigned to receive either memantine or placebo for the duration of the 12-week, double-blind phase of the trial. Study visits will continue to occur three times each week; participants will also receive weekly therapy. Memantine will be taken twice each day. Participants who complete the 12-week trial will enter a 2-week lead-out phase, during which they will be tapered back to a placebo in a single-blind manner. Weekly psychotherapy sessions will continue until the end of Week 14.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00134901
|United States, New York|
|Research Foundation for Mental Hygiene, Inc.|
|New York, New York, United States, 10032|
|Principal Investigator:||Frances R Levin, M.D.||Research Foundation for Mental Hygiene, Inc.|