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Abstract
Background: Serum ethanol concentrations may become higher when alcohol is consumed during treatment with histamine receptor antagonists, especially if ethanol is ingested postprandially. Only a few studies have investigated fasting subjects, and women have only been investigated sporadically. Methods: The present study compared serum ethanol concentrations after a 4-h fast followed by a low (0.15 g/kg) and a high (0.45 g/kg) dose of ethanol, on two separate occasions in six women and six men. The study was carried out before and after treatment with 400 mg cimetidine twice daily. Results: Cimetidine administration did not change the area under the concentration-time curve or the maximal serum ethanol concentration in either women or men, irrespective of ethanol dose. Ethanol elimination rate was unchanged by cimetidine. Conclusion: Cimetidine does not influence the ethanol concentration-time curve when ethanol is ingested on an empty stomach.