title: Cimetidine and ranitidine in duodenal ulcer.
mesh_terms: D002927:Cimetidine / Q000627:therapeutic use*; D004381:Duodenal Ulcer / Q000188:drug therapy*; D005663:Furans / Q000627:therapeutic use*; D006146:Guanidines / Q000627:therapeutic use*; D006801:Humans; D011899:Ranitidine
chemical_list: D005663:Furans; D006146:Guanidines; D002927:Cimetidine; D011899:Ranitidine