Effects of cold or restraint on incidence of gastric ulceration induced in rats by ulcerogenic drugs.

Exposure to cold (4degreesC) or restraint increased the incidence and severity of gastric ulceration induced after i.p. injection of phenylbutazone, aspirin and indomethacin but not of histamine. Oral administration of cimetidine, an H2-receptor blocker, 30 min before drug injection, prevented the occurrence of gastric lesions.