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Journal Article


Brasser SM, McCaul ME, Houtsmuller EJ. Alcohol Clin. Exp. Res. 2004; 28(7): 1074-1083.


Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland 21224-6823, USA.


(Copyright © 2004, John Wiley and Sons)






BACKGROUND: Acamprosate (calcium acetyl homotaurinate) reduces alcohol intake in animals and increases abstinence rates in alcohol-dependent persons. Acamprosate's mechanism of action, however, remains poorly understood. In order to examine whether acamprosate/alcohol interactions contribute to acamprosate's efficacy, the present double-blind, placebo-controlled human laboratory study examined effects of acamprosate on the pharmacokinetics and subjective, psychomotor, and physiological effects of alcohol in heavy drinkers. METHODS: In a six-week within-subject design, participants were maintained on acamprosate (0, 2, and 4 g, p.o., double-blind, in counterbalanced order) for 11 days at each dose. Physiological, subjective, and psychomotor measures were collected daily during each dosing cycle. During each acamprosate dose condition, subjects were challenged with 0, 0.5, and 1.0 g/kg ethanol (p.o., counterbalanced order) during three separate laboratory sessions. Subjective, physiological, and psychomotor effects of alcohol, and breath alcohol levels were collected at baseline and at 30-min intervals for a 3-hr post-administration period. RESULTS: Acamprosate alone did not substantially affect subjective, physiological, or psychomotor performance measures. Acamprosate did not alter alcohol pharmacokinetics, or alcohol-induced behavioral impairment or tachycardia, and most subjective alcohol effects were also unaltered by acamprosate as well. Although a trend appeared for acamprosate to increase subjective ratings of intoxication following the lower (0.5 g/kg) alcohol dose, adjustment for individual differences in blood alcohol level eliminated this effect, suggesting the trend was not due to a central effect of acamprosate. CONCLUSIONS: Acamprosate does not alter alcohol pharmacokinetics, acute physiological or psychomotor alcohol effects, or most subjective alcohol effects.

Language: en


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