FDA grants emergency use authorization for generic Bimectin injection to prevent screwworm in cattle

The U.S. Food and Drug Administration announced an Emergency Use Authorization for the generic ivermectin product Bimectin injection, allowing its use to prevent New World screwworm infestations in cattle.

The authorization specifies that the drug may be given within 24 hours of birth, at the time of castration, or when a wound appears, but it is prohibited for lactating dairy cows and calves destined for veal.

Producers must observe a 35‑day slaughter withdrawal period to avoid drug residues in the food supply. The FDA highlighted that the decision expands generic options and reduces reliance on a single manufacturer.

Timothy Schell, director of the FDA’s Center for Veterinary Medicine, said the agency’s action reflects a commitment to protect American agriculture while ensuring safety.