title: Omeprazole and cytochrome P450-dependent hepatic metabolism: a comparison of endogenous and exogenous substrates in male rats.
abstract: Omeprazole, a benzimidazole compound which inhibits H+/K+ ATPase in the gut, is used in the treatment of gastroesophageal reflux disease. Clinical and experimental use of omeprazole has been associated with inhibition of the cytochrome P450-dependent metabolism of a few drugs both in vivo in man and in vitro in animals. In these experiments, in vivo administration of omeprazole to rats failed to inhibit the cytochrome P450-dependent metabolism of four prototypic drugs, testosterone or estradiol.
authors.affiliation: Rockefeller University Hospital, New York, N.Y.
authors.forename: R A
authors.initials: RA
authors.lastname: Galbraith
authors.forename: P H
authors.initials: PH
authors.lastname: Jellinck
mesh_terms: D000818:Animals; D065607:Cytochrome P-450 Enzyme Inhibitors; D003577:Cytochrome P-450 Enzyme System / Q000494:pharmacology*; D004958:Estradiol / Q000378:metabolism; D006419:Heme Oxygenase (Decyclizing) / Q000378:metabolism; D008099:Liver / Q000187:drug effects / Q000378:metabolism*; D008297:Male; D009853:Omeprazole / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D013739:Testosterone / Q000378:metabolism
chemical_list: D065607:Cytochrome P-450 Enzyme Inhibitors; D013739:Testosterone; D004958:Estradiol; D003577:Cytochrome P-450 Enzyme System; D006419:Heme Oxygenase (Decyclizing); D009853:Omeprazole