Pharmacokinetic behaviour of enrofloxacin and its metabolite ciprofloxacin after subcutaneous administration in cattle

Pharmacokinetic behaviour of enrofloxacin and its metabolite ciprofloxacin after subcutaneous administration in cattle

الكاتب: Multiple References

This study compared pharmacokinetic profiles in cattle dosed subcutaneously with two different formulations of enrofloxacin (5% and 10%) at a dose of 5 mg/kg. Plasma concentrations of enrofloxacin and its active metabolite, ciprofloxacin, were determined by a HPLC/u.v. method. The pharmacokinetic parameters of enrofloxacin and its metabolite were similar in both injectable formulations. Enrofloxacin peak plasma concentration (5%: 0.73±0.32; 10%: 0.60±0.14 μg/mL) was reached at 1.21±0.52 and 1.38±0.52 h to 5 and 10%, respectively. The terminal half-live and area under curve were 2.34±0.46 and 2.59± 0.46 h, and 3.09±0.81 and 2.93±0.58 μg·h/mL, to 5 and 10%, respectively. The AUC/ MIC90 and Cmax/MIC90 ratios for both formulations exceed the proposed threshold values for optimized efficacy and minimized resistance development whilst treating infections or septicaemia caused by P. multocida and E. coli.


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