Disposition of fenbendazole in cattle.
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Short CR, Barker SA, Hsieh LC, Ou SP, McDowell T, Davis LE, Neff-Davis CA, Koritz G, Bevill RF, Munsiff IJ
Disposition of fenbendazole in cattle.
Am J Vet Res. 1987 Jun;48(6):958-61.
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- 3605812 [ View in PubMed]
- Abstract
Fenbendazole (FBZ) was administered to cattle IV and orally in a crossover design. Plasma concentration vs time profiles were reported for FBZ and its major metabolites, the sulfoxide (oxfendazole) and the sulfone. The total excretion of FBZ and its metabolites in urine and feces was also measured for 6 days after administration. All known metabolites were identified in urine and feces except for fenbendazole amine. Neither this minor metabolite nor p-hydroxyfenbendazole (FBZ-OH) appeared in plasma. The major excretory product was FBZ-OH. After oral administration, only 44.6% of the dose was eliminated after 6 days, indicating a fairly high degree of sequestration, probably within the gastrointestinal tract.
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