Effects of indomethacin, aspirin, and acetaminophen on ethanol diuresis in rats.

A number of studies have indicated that prostaglandin synthetase inhibitors (PGSI) can antagonize several effects of ethanol. This study examines the influence of intraperitoneal pretreatment with the PGSI indomethacin (5.0 or 10.0 mg/kg), aspirin (15.0 or 30.0 mg/kg) and acetaminophen (15.0 or 30.0 mg/kg) on the diuretic effect produced by orally administered ethanol (4.0 g/kg) in female rats. Pretreatments with indomethacin and aspirin led to an antagonism of ethanol's diuretic effect. Nevertheless, acetaminophen failed to antagonize this effect. These results are in agreement with data from the literature on PGSI versus ethanol and suggest possible involvement of prostaglandins in the diuretic effect of ethanol.