Cimetidine.
D002927:Cimetidine / Q000009:adverse effects / Q000097:blood / Q000494:pharmacology* / Q000627:therapeutic use; D004381:Duodenal Ulcer / Q000188:drug therapy; D006146:Guanidines / Q000494:pharmacology*; D006801:Humans; D015043:Zollinger-Ellison Syndrome / Q000188:drug therapy
D006146:Guanidines; D002927:Cimetidine