cimetidine
ci·met·i·dine
noun \sī-ˈmet-ə-ˌdēn\Definition of CIMETIDINE
: an H2 antagonist C10H16N6S that like histamine contains the ring structure of imidazole and is used to inhibit gastric acid secretion in conditions in which such secretion produces duodenal or gastric ulcers or erosive lesions (as in serious cases of gastroesophageal reflux disease)—see tagamet
