Intrauterine administration was performed in six Friesan cows with a disposable spray preparation containing 3 g of sulfamonomethoxine and 3 g of oxytetracycline, in order to investigate their serum kinetics. Sulfamonomethoxine levels were determined by a reversed-phase HPLC method, whilst oxytetracycline quantities were detected by a microbiological method. The sulphonamide had a peak 1.17 h after the administration, the tetracycline reached its highest concentration after 8 h. The bioavailability of both drugs was low and detectable drug amounts were no longer recovered after 24 h.
Blood kinetics of sulfamonomethoxine and oxytetracycline following intrauterine spray injection in dairy cows.
DACASTO, MAURO;
1990
Abstract
Intrauterine administration was performed in six Friesan cows with a disposable spray preparation containing 3 g of sulfamonomethoxine and 3 g of oxytetracycline, in order to investigate their serum kinetics. Sulfamonomethoxine levels were determined by a reversed-phase HPLC method, whilst oxytetracycline quantities were detected by a microbiological method. The sulphonamide had a peak 1.17 h after the administration, the tetracycline reached its highest concentration after 8 h. The bioavailability of both drugs was low and detectable drug amounts were no longer recovered after 24 h.
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