Comparison of pharmacokinetics of sodium and lysine cephalexin in calves |
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Authors: | S CARLI G PERRETTA T BRUSA A INVERNIZZI R FAUSTINI |
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Institution: | Institute of Pharmacology, Toxicology and Experimental Therapy, Faculty of Veterinary Medicine, University of Milan, Italy |
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Abstract: | The pharmacokinetics of sodium and lysine cephalexins were investigated after intravenous and intramuscular administration of a single dose rate of 30 mg.kg-1 body weight in calves. The data for the two salts administered intravenously were pooled, the resulting pharmacokinetic disposition of cephalexin indicating a distribution half-time (t1/2 alpha) and an elimination half-time (t1/2 beta) of 9.78 and 62.0 min, respectively. Following intramuscular administration some pharmacokinetic differences were recorded between the cephalexin preparations: lysine cephalexin was more rapidly eliminated (t1/2kel = 55.2 min) than sodium cephalexin (t1/2kel = 89.8 min), although the peak blood level was higher and attained after a longer time with lysine cephalexin. |
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