Pfizer Animal Health is introducing a new formulation of ceftiofur hydrochloride to the market. Excenel® RTU EZ is a formulation change to improve the syringeability of the product. The new formulation is bioequivalent to Excenel® RTU currently on the market and will be replacing that product.
The labeled withdrawal period will be 4 days in the U.S. Pfizer recommends a 5 day withdrawal, however, to meet the Japanese MRLs.