title: Time-dependent induction of hepatic drug metabolism in rats by cotinine.
abstract: Cotinine, administered twice a day for 2 days in a dose of 20 or 40 mg/kg i.p., induced rat hepatic drug metabolism between 22% to 62%. Induction decreased to 26-37% after 4 days of cotinine (40 mg/kg bid). No significant induction was observed after 8 days of this dose of cotinine. Explanations are offered for decreasing induction by cotinine with time.
mesh_terms: D000815:Aniline Hydroxylase / Q000378:metabolism; D000818:Animals; D003367:Cotinine / Q000494:pharmacology*; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism*; D005037:Ethylmorphine-N-Demethylase / Q000378:metabolism; D007700:Kinetics; D008297:Male; D008862:Microsomes, Liver / Q000187:drug effects / Q000201:enzymology*; D006899:Mixed Function Oxygenases / Q000378:metabolism*; D010088:Oxidoreductases / Q000378:metabolism*; D011760:Pyrrolidinones / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D011760:Pyrrolidinones; D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D010088:Oxidoreductases; D000815:Aniline Hydroxylase; D005037:Ethylmorphine-N-Demethylase; D003367:Cotinine