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AI InsightThe oral bioavailability (F) of OTC in rainbow trout was found to be only 1.187%.
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Özet
The pharmacokinetics of oxytetracycline (OTC) were investigated in rainbow trout in freshwater at 10.5 oC. A group of 70 fish received OTC, an intravascular injection (i.v.) of 5 mg/kg body weight. Another group of 105 fish were fed medicated feed containing a dose of 100 mg/kg body weight. OTC plasma concentrations were determined by high performance liquid chromatography. The pharmacokinetic parameters were described by a two-compartment open model giving distribution half-lives of 0.907 h and 16.058 h, and elimination half-lives of 33.5 h and 27 h for i.v. and oral administration of OTC, respectively. After i.v. administration of OTC, other pharmacokinetic parameters estimated were the area under the curve (AUC: 145.078 ± 4.45 mg.ml-1.h-1) and mean residence time (MRT: 40.604 ± 1.150 h). Following oral administration, AUC was 34.46 ± 1.189 mg.ml-1.h-1; MRT was 59.272 ± 1.541 h; Cmax was 0.577 mg/ml and Tmax was 36 h. The oral bioavailability (F) of OTC in rainbow trout was found to be only 1.187%.
Abstract
The pharmacokinetics of oxytetracycline (OTC) were investigated in rainbow trout in freshwater at 10.5 oC. A group of 70 fish received OTC, an intravascular injection (i.v.) of 5 mg/kg body weight. Another group of 105 fish were fed medicated feed containing a dose of 100 mg/kg body weight. OTC plasma concentrations were determined by high performance liquid chromatography. The pharmacokinetic parameters were described by a two-compartment open model giving distribution half-lives of 0.907 h and 16.058 h, and elimination half-lives of 33.5 h and 27 h for i.v. and oral administration of OTC, respectively. After i.v. administration of OTC, other pharmacokinetic parameters estimated were the area under the curve (AUC: 145.078 ± 4.45 mg.ml-1.h-1) and mean residence time (MRT: 40.604 ± 1.150 h). Following oral administration, AUC was 34.46 ± 1.189 mg.ml-1.h-1; MRT was 59.272 ± 1.541 h; Cmax was 0.577 mg/ml and Tmax was 36 h. The oral bioavailability (F) of OTC in rainbow trout was found to be only 1.187%.