title: Pharmacokinetics of enrofloxacin after intravenous and intramuscular injection in rabbits.
abstract: The pharmacokinetics and bioavailability of enrofloxacin were determined after IV and IM administration of 5 mg/kg of body weight to 6 healthy adult rabbits. Using nonlinear least-squares regression methods, data obtained were best described by a 2-compartment open model. After IV administration, a rapid distribution phase was followed by a slower elimination phase, with a half-life of 131.5 +/- 17.6 minutes. The mean body clearance rate was 22.8 +/- 6.8 ml/min/kg, and the mean volume of distribution was 3.4 +/- 0.9 L/kg. This large volume of distribution and the K12/K21 ratio close to 1, indicated that enrofloxacin was widely distributed in the body, but not retained in tissues. After a brief lag period (6.2 +/- 2.86 min), IM absorption was rapid (4.1 +/- 1.3 min) and almost complete. The mean extent of IM absorption was 92 +/- 11%, and maximal plasma concentration of 3.04 +/- 0.34 micrograms/ml was detected approximately 10 minutes after administration.
authors.affiliation: Peptides Department, CID, CSIC, Barcelona, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Cabanes
authors.forename: M
authors.initials: M
authors.lastname: Arboix
authors.forename: J M
authors.initials: JM
authors.lastname: Garcia Anton
authors.forename: F
authors.initials: F
authors.lastname: Reig
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D000077422:Enrofloxacin; D024841:Fluoroquinolones; D007273:Injections, Intramuscular / Q000662:veterinary; D007275:Injections, Intravenous / Q000662:veterinary; D015363:Quinolones / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D011817:Rabbits / Q000378:metabolism*
chemical_list: D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D015363:Quinolones; D000077422:Enrofloxacin