The U.S. Food and Drug Administration (FDA) has issued an Emergency Use Authorization authorizing the use of Ivomec (ivermectin) injectable solution to treat New World screwworm infestations in cattle.
Based on available scientific evidence, the FDA determined the product may be effective in preventing myiasis when administered within 24 hours of birth, at castration or when wounds appear, with benefits outweighing potential risks. Ivomec is not approved for use in lactating dairy cows producing milk for human consumption and carries a 35-day slaughter withdrawal period.
The authorization remains in effect until revoked or terminated by the Department of Health and Human Services. Ivomec is sold over the counter, and producers are responsible for label compliance and prudent use to limit antiparasitic resistance.
