title: Pharmacokinetics of pipemidic acid in chickens after single intravenous and oral dosings.
abstract: The pharmacokinetics of pipemidic acid after 2 single doses were studied in broiler chickens. Chickens were given single IV and oral doses of 10 and 30 mg of pipemidic acid/kg of body weight. Blood samples were collected over 8 hours after each dose administration. High-pressure liquid chromatography with UV detection was used to determine concentrations in plasma of pipemidic acid. The plasma concentration-time curves after IV administration followed 2-compartment characteristics, rapid initial distribution phase, and a terminal elimination phase. The pharmacokinetic variables differed significantly between single doses of 10 and 30 mg of pipemidic acid/kg. Mean disposition variables were a half-life at alpha phase of 0.06 hours or 0.33 hours, a half-life at beta phase of 1.18 hours or 1.72 hours, a volume of distribution in the central compartment of 0.12 L/kg or 0.31 L/kg, a volume of distribution during the elimination beta phase of 1.64 L/kg or 1.05 L/kg, and a total plasma clearance of 0.97 L/h.kg or 0.41 L/h.kg, for the 10 or 30 mg/kg dose, respectively. After oral administration, the pipemidic acid plasma profile could be adequately described by a 1-compartment model. After the single oral doses of 10 and 30 mg of pipemidic acid/kg, pipemidic acid was absorbed rapidly (time to maximal concentration of 0.31 hours or 0.71 hours) and eliminated with a mean half-life of 0.86 hours or 0.61 hours, respectively. The bioavailability was 39% at 10 mg of pipemidic acid/kg and 61% at 30 mg of pipemidic acid/kg.
authors.affiliation: Department of Pharmacology, Faculty of Medicine, Complutense University, Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Anadón
authors.forename: M R
authors.initials: MR
authors.lastname: Martínez-Larrañaga
authors.forename: M J
authors.initials: MJ
authors.lastname: Díaz
authors.forename: C
authors.initials: C
authors.lastname: Vélez
authors.forename: P
authors.initials: P
authors.lastname: Bringas
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001682:Biological Availability; D002645:Chickens / Q000097:blood / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid / Q000662:veterinary; D006207:Half-Life; D007275:Injections, Intravenous / Q000662:veterinary; D008297:Male; D010876:Pipemidic Acid / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D013997:Time Factors
chemical_list: D010876:Pipemidic Acid