title: Definition and antagonism of histamine H 2 -receptors.
mesh_terms: D000818:Animals; D001593:Benzyl Compounds / Q000494:pharmacology; D001794:Blood Pressure / Q000187:drug effects; D002415:Cats; D004285:Dogs; D005029:Ethylenediamines / Q000494:pharmacology; D005260:Female; D005750:Gastric Juice / Q000378:metabolism; D006168:Guinea Pigs; D006325:Heart Atria / Q000187:drug effects; D006632:Histamine / Q000494:pharmacology*; D006634:Histamine H1 Antagonists / Q000494:pharmacology*; D006801:Humans; D007082:Ileum / Q000187:drug effects; D007093:Imidazoles / Q000494:pharmacology; D066298:In Vitro Techniques; D007700:Kinetics; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D010418:Pentagastrin / Q000494:pharmacology; D011725:Pyridines / Q000494:pharmacology*; D051381:Rats; D011955:Receptors, Drug; D013890:Thiourea / Q000494:pharmacology*; D014599:Uterus / Q000187:drug effects
chemical_list: D001593:Benzyl Compounds; D005029:Ethylenediamines; D006634:Histamine H1 Antagonists; D007093:Imidazoles; D011725:Pyridines; D011955:Receptors, Drug; D006632:Histamine; D010418:Pentagastrin; D013890:Thiourea