Pharmacokinetic interaction of nitroxynil and cefoperazone in goats


  • Mohamed El-hewaity





Kinetic, Interaction, Nitroxynil, Cefoperazone, Goat.


The pharmacokinetic aspects of cefoperazone (CEFO) were investigated via intravenous (IV), and intramuscular (IM) injections in clinically healthy goats at a dose of 20 mg/kg b.wt. Goats were pre-treated with nitroxynil (25%) or nitroxynil (34%) subcutaneously in a dose 10 mg/kg b.wt, respectively. Cefoperazone was injected intramuscularly nine hours following anthelmintic administration, and blood samples were taken by jugular venipuncture at standardized intervals. Cefoperazone concentrations in serum were determined by microbiological assay technique. Goats pre-treated with nitroxynil (25%) or nitroxynil (34%) showed a significant decrease in serum cefoperazone level as compared to non-anthelmintic treated goats. The obtained data revealed that administration of nitroxynil in both concentrations negatively affected most of the cefoperazone parameters. In this respect, the elimination half-life T0.5(el), Cmax, AUC, and the systemic bioavailability (F %) were significantly decreased in both groups of nitroxynil-treated goats compared to non-anthelmintic treated goats. On the other hand, there were no significance differences between both nitroxynil (25% and 34%) treated goats. Concomitant administration of nitroxynil (25% and 34%) with cefoperazone resulted in significant alterations in the disposition kinetic of cefoperazone in goats. Consequently, the interaction between nitroxynil and cefoperazone could be of clinical significance and may require monitoring and adjustment of cefoperazone dosage.


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