Propranolol and cimetidine.
D002927:Cimetidine / Q000494:pharmacology*; D006146:Guanidines / Q000494:pharmacology*; D006321:Heart / Q000187:drug effects; D006801:Humans; D011433:Propranolol / Q000494:pharmacology*; D011970:Receptors, Histamine H2 / Q000187:drug effects
D006146:Guanidines; D011970:Receptors, Histamine H2; D002927:Cimetidine; D011433:Propranolol