Ranitidine vs cimetidine in the treatment of duodenal ulcer.
D002927:Cimetidine / Q000627:therapeutic use*; D004381:Duodenal Ulcer / Q000188:drug therapy*; D006801:Humans; D008297:Male; D011897:Random Allocation; D011899:Ranitidine / Q000627:therapeutic use*
D002927:Cimetidine; D011899:Ranitidine