Timoprazole is a substituted benzimidazole patented by Aktiebolag Hassle as an antisecretory agent that inhibits gastric acid secretion by interference with (H+-K+)-ATPase. Timoprazole given orally was found to be cytoprotective for the stomach when given 30 min prior to a challenge to boiling water, ethanol, or HCl. Timoprazole also prevented necrosis of the mucosa and acute ulcerations induced by alcohol in the rat fundus, as evaluated by histopathology.