Inhibition of histamine release by histamine controlled by H2 receptor.
D001491:Basophils / Q000378:metabolism; D000242:Cyclic AMP / Q000096:biosynthesis; D004155:Diphenhydramine / Q000494:pharmacology*; D005246:Feedback; D006632:Histamine / Q000378:metabolism / Q000494:pharmacology*; D006634:Histamine H1 Antagonists / Q000494:pharmacology*; D006636:Histamine Release / Q000187:drug effects*; D006801:Humans; D006967:Hypersensitivity / Q000276:immunology; D007093:Imidazoles / Q000494:pharmacology; D007962:Leukocytes / Q000276:immunology / Q000378:metabolism; D011955:Receptors, Drug / Q000187:drug effects*; D013890:Thiourea / Q000494:pharmacology*
D006634:Histamine H1 Antagonists; D007093:Imidazoles; D011955:Receptors, Drug; D006632:Histamine; D004155:Diphenhydramine; D000242:Cyclic AMP; D013890:Thiourea