title: An antihistamine antagonises emesis due to an antihistamine.
mesh_terms: D000818:Animals; D010856:Columbidae / Q000502:physiology*; D003533:Cyproheptadine / Q000037:antagonists & inhibitors* / Q000494:pharmacology; D006632:Histamine / Q000494:pharmacology; D009325:Nausea / Q000139:chemically induced*; D011398:Promethazine / Q000494:pharmacology*
chemical_list: D003533:Cyproheptadine; D006632:Histamine; D011398:Promethazine