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  • Title: Pharmacokinetics and intramuscular bioavailability of cefuroxime sodium in goats.
    Author: ABO EL-SOOUD K, El-Banna HA, Hanafy MS, Goudah A.
    Journal: Res Vet Sci; 2000 Dec; 69(3):219-24. PubMed ID: 11124092.
    Abstract:
    The pharmacokinetics of cefuroxime sodium, 20 and 40 mg kg(-1), were studied after i.v. and intramuscular injections in goats. Following single i.v. injections the serum concentration time curves of cefuroxime sodium were best fitted to a two-compartment open model. The drug was rapidly distributed with half-lives of distribution (t(1/2 alpha)) of 0.250 hours and 0.266 hours, and rapidly eliminated with half-lives of elimination (t(1/2 beta)) of 1.482 hours and 1.416 hours, respectively, following single i.v. injections of 20 and 40 mg kg(-1)body weight. After single intramuscular injections of cefuroxime sodium at the same doses, the mean absorption time (MAT) values were 1.379 and 1.716 hours and the peak serum concentration, C(max), was 12.965 and 38.50 microg ml(-1), attained after 0.515 and 0.608 hours (t(max)), respectively. The elimination half-lives (t(1/2el)) were 2.088 and 2.114 hours and the mean residence times (MRT) were 3.198 and 3.237 hours for 20 and 40 mg kg(-1)body weight, respectively. After both i.v. and intramuscular injections of cefuroxime sodium, the concentrations of cefuroxime in urine were much higher than that in serum. Urinary drug concentrations decreased gradually to reach their lowest levels at 24 and 48 hours post-injection, respectively. The systemic bioavailability of cefuroxime sodium in goats after intramuscular injections of 20 and 40 mg kg(-1)body weight was 88.4 per cent and 103.5 per cent, respectively. In vitro protein binding of cefuroxime sodium in goat's serum was low, ranging from 13.3 per cent to 21.6 per cent with an average of 17.0 per cent.
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