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Relapse Prevention in Alcoholics

A Review of Acamprosate versus Naltrexone

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Abstract

Objective: To compare two anticraving drugs, acamprosate and naltrexone, for effectiveness, kinetics and tolerability in patients with abusing or dependent on alcohol.

Design: This study reviewed all published double-blind, placebo-controlled trials of patients abusing or dependent on alcohol. Main clinical outcome measures were: time to relapse, cumulative relapse rate, total number of drinks during study period.

Setting: Mainly ambulant cases.

Patients: Patients consisted of 3338 acamprosate and more than 200 naltrexone cases.

Interventions: Some studies also used psychosocial support, one combined acamprosate with disulfiram.

Results: Both drugs were superior to placebo. Drop-out rates were comparable between drugs. Naltrexone caused more adverse effects than acamprosate. Acamprosate has been studied for over 1 year and has been shown to remain effective with carry-over of the effect after stopping the medication for at least 1 year; naltrexone has been studied for 3 months, with no carry-over.

Conclusion: Both drugs were effective, but acamprosate may be preferred above naltrexone because of its proven long-term effectiveness with carry-over.

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Hoes, M.J.A.J.M. Relapse Prevention in Alcoholics. Clin. Drug Investig. 17, 211–216 (1999). https://doi.org/10.2165/00044011-199917030-00005

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