Does ranitidine affect blood alcohol concentrations?

No interaction occurs between ranitidine and alcohol when alcohol 0.3 g/kg or more is taken by either fed or fasted subjects. Ranitidine is associated with small increases (2-4 mg/dl) in blood alcohol concentrations in subjects given alcohol 0.15 g/kg under specific experimental conditions. Mean peak blood alcohol concentrations nevertheless remain low (< 20 mg/dl) after the amount, which is equivalent to about 3 oz of wine or 1 oz of 80-proof liquor. Such changes also occur when alcohol is ingested after different types of foods, and are smaller than the increases when it is drunk on an empty compared with a full stomach. The pharmacokinetic effect seen with ranitidine is without apparent clinical or social significance.