Abstract

This randomized, double-blind, placebo-controlled study compared the cytoprotective effects of misoprostol, a synthetic analog of prostaglandin E1, and cimetidine on ethanol-induced gastric mucosal damage. Forty-five healthy male subjects were accepted, following endoscopy to exclude those with upper gastrointestinal disease. Injury to the gastric mucosa was induced by spraying it with 80% ethanol solution. Misoprostol (200 micrograms) intragastrically or cimetidine (300 mg) orally or placebo was administrated before the ethanol challenge. The gastric mucosa was graded using a seven-point endoscopic scale by two endoscopists 15 and 30 min after ethanol instillation. Thirty minutes following the instillation of ethanol, the gastric mucosa of placebo-treated subjects showed marked damage, with an endoscopic score (mean +/- standard deviation) of 5.5 +/- 0.9. Cimetidine partially prevented gastric mucosal damage, with an endoscopic score of 4.5 +/- 1.7 as compared to placebo (p = 0.04). Misoprostol significantly prevented gastric mucosal injury with a mean endoscopic score of 1 +/- 1.7 when compared to placebo (p = 0.0001) and to cimetidine (p = 0.0002). This cytoprotective action of misoprostol may prove to be clinically very important and warrants further investigation.

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