Blockade of cardiac histamine receptors by promethazine.
D000818:Animals; D000242:Cyclic AMP / Q000096:biosynthesis; D004305:Dose-Response Relationship, Drug; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects; D006339:Heart Rate / Q000187:drug effects; D006632:Histamine / Q000494:pharmacology; D006634:Histamine H1 Antagonists / Q000494:pharmacology; D009638:Norepinephrine / Q000494:pharmacology; D011398:Promethazine / Q000494:pharmacology*; D011955:Receptors, Drug / Q000187:drug effects*; D013268:Stimulation, Chemical
D006634:Histamine H1 Antagonists; D011955:Receptors, Drug; D006632:Histamine; D000242:Cyclic AMP; D011398:Promethazine; D009638:Norepinephrine