A human laboratory study of the effects of quetiapine on subjective intoxication and alcohol craving
The available treatments for alcoholism are only modestly effective, and patients vary widely in their treatment response. Quetiapine, an atypical antipsychotic medication with antagonist activity at D1 and D2, 5-HT1A and 5-HT2A, H1, and α1 and α2 receptors was shown to promote abstinence, reduce drinking days, and reduce heavy drinking days in a 12-week double-blind placebo-controlled trial.
Although quetiapine represents one of the promising pharmacotherapies for the treatment of alcoholism, its mechanisms of action are poorly understood. The objective of this study is to elucidate the biobehavioral mechanisms of action of quetiapine for alcoholism, by examining its effects on subjective intoxication and craving.
A total of 20 non-treatment-seeking alcohol-dependent individuals were randomized to one of the following conditions in a double-blind, placebo-controlled design: (1) quetiapine (400 mg/day); or (2) matched placebo. Participants were on the target medication dose (or matched placebo) for 4 weeks during which they completed weekly assessments of drinking, sleep, mood, and anxiety. Participants completed two counterbalanced intravenous placebo-alcohol administration sessions as well as cue-reactivity assessments.
Analyses revealed a significant effect of quetiapine in reducing craving during the alcohol administration, the alcohol cue-exposure, and the weekly reports of alcohol craving. Quetiapine was also found to reduce subjective intoxication and alcohol-induced sedation during the alcohol administration paradigm.
This study contributes critical new information about mechanisms of response to quetiapine for alcoholism, which, in turn, can inform larger-scale studies and ultimately, clinical practice.
KeywordsQuetiapine Alcoholism Alcohol craving Subjective intoxication Laboratory
This study was supported by seed funds from the Department of Psychology at the University of California Los Angeles (UCLA) and by NIH/NCRR grant number M01-RR00865. The authors wish to thank Ryan Arellano, Ellen Chang, Belinda De La Torre, Ana Heydari, and Spencer Bujarski for their contribution to data collection and data management for this project.
Conflict of interest
None of the authors have any conflicts of interest to report.
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