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J Vet Pharmacol Ther ; 41(5): 755-759, 2018 Oct.
Article in English | MEDLINE | ID: mdl-29889311

ABSTRACT

The comparative pharmacokinetics of ivermectin (IVM), between healthy and in Escherichia coli lipopolysaccharides (LPS) injected sheep, was investigated after an intravenous (IV) administration of a single dose of 0.2 mg/kg. Ten Suffolk Down sheep, 55 ± 3.3 kg, were distributed in two experimental groups: Group 1 (LPS): treated with three doses of 1 µg LPS/kg bw at -24, -16, and -0.75 hr before IVM; group 2 (Control): treated with saline solution (SS). An IV dose of 0.2 mg IVM/kg was administered 45 min after the last injection of LPS or SS. Plasma concentrations of IVM were determined by liquid chromatography. Pharmacokinetic parameters were calculated based on non-compartmental modeling. In healthy sheep, the values of the pharmacokinetic parameters were as follows: elimination half-life (2.85 days), mean residence time (MRT) (2.27 days), area under the plasma concentration curve over time (AUC, 117.4 ng day-1 ml-1 ), volume of distribution (875.6 ml/kg), and clearance (187.1 ml/day). No statistically significant differences were observed when compared with the results obtained from the group of sheep treated with LPS. It is concluded that the acute inflammatory response (AIR) induced by the intravenous administration of E. coli LPS in adult sheep produced no changes in plasma concentrations or in the pharmacokinetic behavior of IVM, when it is administered intravenously at therapeutic doses.


Subject(s)
Antiparasitic Agents/pharmacokinetics , Endotoxins/pharmacology , Ivermectin/pharmacokinetics , Animals , Antiparasitic Agents/administration & dosage , Antiparasitic Agents/blood , Chromatography, Liquid/veterinary , Female , Injections, Intravenous/veterinary , Ivermectin/administration & dosage , Ivermectin/blood , Male , Sheep/metabolism , Sheep Diseases/metabolism , Sheep Diseases/microbiology
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