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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Memantine enhances the inhibitory effects of naltrexone on ethanol consumption.

Effects of the opioid receptor antagonist naltrexone (0.1; 0.3; 1.0 mg/kg i.p.) on operant ethanol self-administration alone and in combination with the non-competitive NMDA antagonist memantine (0.5 and 1 mg/kg, i.p.) were studied in rats. Acute administration of naltrexone (0.1; 0.3; 1.0 mg/kg i.p.) inhibited ethanol self-administration in a dose-dependent manner. Memantine (1.0 mg/kg) significantly enhanced the effects of naltrexone at 0.1 mg/kg, failing per se to inhibit ethanol consumption. Thus, low, sub-effective dose of memantine in combination with low doses of naltrexone blocked the reinforcing properties of ethanol in rats. It is suggested that the combination of sub-effective doses of memantine and naltrexone may have therapeutic value in the treatment of alcoholism particularly in a subgroup of alcoholic patients who have high sensitivity to the adverse side effects of naltrexone.[1]


  1. Memantine enhances the inhibitory effects of naltrexone on ethanol consumption. Kuzmin, A., Stenback, T., Liljequist, S. Eur. J. Pharmacol. (2008) [Pubmed]
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