title: Chemical and biologic differences between various H2-receptor antagonists.
abstract: After a brief historical review, the common chemical features of various H2-receptor antagonists are discussed, demonstrating that an imidazole, furan, thiazole, and the piperidinylmethylphenoxy moiety can serve as an aromatic nucleus of histamine H2-receptor antagonists. Furthermore, it is paradigmatically illustrated that the histamine H2-receptor antagonists in use or under clinical investigations inhibit, in a competitive and surmountable manner, parietal cell acid secretion and histamine H2-receptor-linked adenylate cyclase. Furthermore, toxicologic problems of unsurmountable and/or or long-acting histamine H2-receptor antagonists (tiotidine, loxtidine, and SK&F 93479) are discussed.
authors.affiliation: Dept. of Pharmacology, Medical School, University of Hanover, FRG.
authors.forename: K F
authors.initials: KF
authors.lastname: Sewing
mesh_terms: D000818:Animals; D000897:Anti-Ulcer Agents; D055598:Chemical Phenomena; D002621:Chemistry; D006168:Guinea Pigs; D006635:Histamine H2 Antagonists / Q000494:pharmacology; D006801:Humans; D010295:Parietal Cells, Gastric / Q000187:drug effects; D013329:Structure-Activity Relationship
chemical_list: D000897:Anti-Ulcer Agents; D006635:Histamine H2 Antagonists