title: Antipyrine pharmacokinetics in the pregnant rat.
abstract: Pronounced differences in pharmacokinetic parameters of antipyrine have been found in the 20-day pregnant hooded Wistar rat when compared with nonpregnant controls. Total body clearance falls significantly from 5.93 to 3.5 ml/min/kg in the pregnant rat whereas no significant increase in antipyrine volume of distribution occurs. These changes result in an increase in antipyrine half-life from 109 to 223 min in the pregnant rat. This study demonstrates that reduced hepatic mono-oxygenase capacity exists in the pregnant rat and that this can markedly affect drug clearance in there animals.
mesh_terms: D000818:Animals; D000983:Antipyrine / Q000378:metabolism*; D005260:Female; D006207:Half-Life; D006900:Hydroxylation; D066298:In Vitro Techniques; D007700:Kinetics; D008099:Liver / Q000201:enzymology; D006899:Mixed Function Oxygenases / Q000037:antagonists & inhibitors; D011247:Pregnancy; D011270:Pregnancy, Animal; D011506:Proteins / Q000378:metabolism; D051381:Rats
chemical_list: D011506:Proteins; D006899:Mixed Function Oxygenases; D000983:Antipyrine