Disulfiram for the treatment of cocaine dependence
- PMID: 38180268
- PMCID: PMC10767770
- DOI: 10.1002/14651858.CD007024.pub3
Disulfiram for the treatment of cocaine dependence
Abstract
Background: Cocaine is a psychostimulant used by approximately 0.4% of the general population worldwide. Cocaine dependence is a chronic mental disorder characterised by the inability to control cocaine use and a host of severe medical and psychosocial complications. There is current no approved pharmacological treatment for cocaine dependence. Some researchers have proposed disulfiram, a medication approved to treat alcohol use disorder. This is an update of a Cochrane review first published in 2010.
Objectives: To evaluate the efficacy and safety of disulfiram for the treatment of cocaine dependence.
Search methods: We updated our searches of the following databases to August 2022: the Cochrane Drugs and Alcohol Group Specialised Register, CENTRAL, MEDLINE, Embase, CINAHL, and PsycINFO. We also searched for ongoing and unpublished studies via two trials registries. We handsearched the references of topic-related systematic reviews and included studies. The searches had no language restrictions.
Selection criteria: We included randomised controlled trials that evaluated disulfiram alone or associated with psychosocial interventions versus placebo, no intervention, other pharmacological interventions, or any psychosocial intervention for the treatment of cocaine dependence.
Data collection and analysis: We used standard methodological procedures expected by Cochrane.
Main results: Thirteen studies (1191 participants) met our inclusion criteria. Disulfiram versus placebo or no treatment Disulfiram compared to placebo may increase the number of people who are abstinent at the end of treatment (point abstinence; risk ratio (RR) 1.58, 95% confidence interval (CI) 1.05 to 2.36; 3 datasets, 142 participants; low-certainty evidence). However, compared to placebo or no pharmacological treatment, disulfiram may have little or no effect on frequency of cocaine use (standardised mean difference (SMD) -0.11 standard deviations (SDs), 95% CI -0.39 to 0.17; 13 datasets, 818 participants), amount of cocaine use (SMD -0.00 SDs, 95% CI -0.30 to 0.30; 7 datasets, 376 participants), continuous abstinence (RR 1.23, 95% CI 0.80 to 1.91; 6 datasets, 386 participants), and dropout for any reason (RR 1.20, 95% CI 0.92 to 1.55; 14 datasets, 841 participants). The certainty of the evidence was low for all these outcomes. We are unsure about the effects of disulfiram versus placebo on dropout due to adverse events (RR 12.97, 95% CI 0.77 to 218.37; 1 study, 67 participants) and on the occurrence of adverse events (RR 3.00, 95% CI 0.35 to 25.98), because the certainty of the evidence was very low for these outcomes. Disulfiram versus naltrexone Disulfiram compared with naltrexone may reduce the frequency of cocaine use (mean difference (MD) -1.90 days, 95% CI -3.37 to -0.43; 2 datasets, 123 participants; low-certainty evidence) and may have little or no effect on amount of cocaine use (SMD 0.12 SDs, 95% CI -0.27 to 0.51, 2 datasets, 123 participants; low-certainty evidence). We are unsure about the effect of disulfiram versus naltrexone on dropout for any reason (RR 0.86, 95% CI 0.56 to 1.32, 3 datasets, 131 participants) and dropout due to adverse events (RR 0.50, 95% CI 0.07 to 3.55; 1 dataset, 8 participants), because the certainty of the evidence was very low for these outcomes.
Authors' conclusions: Our results show that disulfiram compared to placebo may increase point abstinence. However, disulfiram compared to placebo or no pharmacological treatment may have little or no effect on frequency of cocaine use, amount of cocaine use, continued abstinence, and dropout for any reason. We are unsure if disulfiram has any adverse effects in this population. Caution is required when transferring our results to clinical practice.
Trial registration: ClinicalTrials.gov https://clinicaltrials.gov/ct2/show/NCT02134002 NCT00000278 NCT00580827.
Copyright © 2023 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.
Conflict of interest statement
FT: none known SM is the Joint Co‐ordinating Editor of Cochrane Drugs and Alcohol Group. She was not involved in the editorial process of the current protocol. ET: none known RV: none known SV: none known PP: none known RA: is an Editor of Cochrane Drugs and Alcohol Group. She was not involved in the editorial process of the current protocol.
Figures
Update of
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Disulfiram for the treatment of cocaine dependence.Cochrane Database Syst Rev. 2010 Jan 20;(1):CD007024. doi: 10.1002/14651858.CD007024.pub2. Cochrane Database Syst Rev. 2010. Update in: Cochrane Database Syst Rev. 2024 Jan 5;1:CD007024. doi: 10.1002/14651858.CD007024.pub3. PMID: 20091613 Updated.
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