title: Toxicity of H2-receptor antagonists.
mesh_terms: D002927:Cimetidine / Q000009:adverse effects*; D004381:Duodenal Ulcer / Q000188:drug therapy*; D006801:Humans; D011899:Ranitidine / Q000009:adverse effects*
chemical_list: D002927:Cimetidine; D011899:Ranitidine