SHEEP CEFTIOFUR (IM) Resources Craigmill, A. L., Brown, S. A., Wetzlich, S. E., Gustafson, C. R., & Arndt, T. S. (1997). Pharmacokinetics of ceftiofur and metabolites after single intravenous and intramuscular administration and multiple intramuscular administrations of ceftiofur sodium to sheep. Journal of Veterinary Pharmacology and Therapeutics, 20(2), 139–144. Resources Craigmill, A. L., Brown, S. A., Wetzlich, S. E., Gustafson, C. R., & Arndt, T. S. (1997). Pharmacokinetics of ceftiofur and metabolites after single intravenous and intramuscular administration and multiple intramuscular administrations of ceftiofur sodium to sheep. Journal of Veterinary Pharmacology and Therapeutics, 20(2), 139–144.