title: Omeprazole versus ranitidine for gastric ulcer.
mesh_terms: D006801:Humans; D009853:Omeprazole / Q000627:therapeutic use*; D011899:Ranitidine / Q000627:therapeutic use*; D013276:Stomach Ulcer / Q000188:drug therapy*
chemical_list: D011899:Ranitidine; D009853:Omeprazole