in a controlled clinical trial conducted in 28 centers , 354 ambulatory patients with a cimetidine-resistant duodenal or gastric ulcer ( at least six weeks of treatment at a dose of 1 g/day ) confirmed by endoscopy were allocated at random to either ranitidine or cimetidine treatment : 166 patients received cimetidine ( 1.6 g/day in 4 oral doses ) , and 188 , ranitidine ( 0.3 g/day in 2 oral doses ) .
C0038358
gastric ulcer
C0008783
cimetidine