five large controlled multicenter multicountry clinical trials have been conducted with misoprostol , including double-blind placebo-controlled comparisons of misoprostol in two duodenal ulcer studies and one gastric ulcer study , and double-blind comparisons of two doses of misoprostol and cimetidine in duodenal ulcer and gastric ulcer studies .
C0008783
cimetidine
C0038358
gastric ulcer