title: Ranitidine in duodenal ulcer: phenomena of "primary failure" and "secondary failure".
authors: B D
authors: BD
authors: Agarwal
mesh_terms: D000208:Acute Disease; D000328:Adult; D004381:Duodenal Ulcer / Q000188:drug therapy*; D005260:Female; D006801:Humans; D008297:Male; D011899:Ranitidine / Q000008:administration & dosage / Q000627:therapeutic use*; D012008:Recurrence
chemical_list: D011899:Ranitidine