title: Comparative study with ranitidine and cimetidine on gastric secretion.
abstract: The inihibitory effect of various doses of ranitidine and cimetidine on pentagastrin stimulated volume, acid, and pepsin secretion was studied in 8 healthy volunteers. Both compounds inhibited all three variables in a dose dependent manner with an average ID50 of approximately 5 mg for ranitidine and of approximately 41 mg for cimetidine. On a molar basis ranitidine is about 11 times more potent than cimetidine. The duration of action of both compounds appears to be equally long.
mesh_terms: D000328:Adult; D000368:Aged; D002927:Cimetidine / Q000008:administration & dosage / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D005663:Furans / Q000008:administration & dosage / Q000494:pharmacology*; D005744:Gastric Acid / Q000378:metabolism*; D006146:Guanidines / Q000494:pharmacology*; D006635:Histamine H2 Antagonists / Q000008:administration & dosage / Q000494:pharmacology*; D006801:Humans; D007275:Injections, Intravenous; D008297:Male; D008875:Middle Aged; D010418:Pentagastrin / Q000494:pharmacology; D010434:Pepsin A / Q000378:metabolism; D011899:Ranitidine
chemical_list: D005663:Furans; D006146:Guanidines; D006635:Histamine H2 Antagonists; D002927:Cimetidine; D011899:Ranitidine; D010434:Pepsin A; D010418:Pentagastrin