Pharmacokinetics after intravenous, intramuscular and subcutaneous administration of difloxacin in sheep |
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Authors: | Marín P Fernández-Varón E Escudero E Cárceles C M |
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Institution: | Department of Pharmacology, Faculty of Veterinary Medicine, University of Murcia, Campus de Espinardo, 30071 Murcia, Spain. pmarin@um.es |
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Abstract: | The disposition kinetics of difloxacin, a fluoroquinolone antibiotic, after intravenous (IV), intramuscular (IM) and subcutaneous (SC) administration were determined in sheep at a single dose of 5mg/kg. The concentration-time data were analysed by compartmental (after IV dose) and non-compartmental pharmacokinetics method (after IV, IM and SC administration). Plasma concentrations of difloxacin were determined by high performance liquid chromatography with fluorescence detection. Steady-state volume of distribution (V(ss)) and clearance (Cl) of difloxacin after IV administration were 1.68+/-0.21L/kg and 0.21+/-0.03L/hkg, respectively. Following IM and SC administration difloxacin achieved maximum plasma concentration of 1.89+/-0.55 and 1.39+/-0.14mg/L at 2.42+/-1.28 and 5.33+/-1.03h, respectively. The absolute bioavailabilities after IM and SC routes were 99.92+/-26.50 and 82.35+/-25.65%, respectively. Based on these kinetic parameters, difloxacin is likely to be effective in sheep. |
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Keywords: | Difloxacin Pharmacokinetics Sheep Bioavailability |
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