FDA Issues Emergency Use Authorization for Drugs to Prevent and Treat New World Screwworm in Dogs and Cats

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US Food and Drug Administration

FDA Issues Emergency Use Authorization for Drugs to Prevent and Treat New World Screwworm in Dogs and Cats 

September 3, 2026

The U.S. Food and Drug Administration today issued an Emergency Use Authorization (EUA) for Capstar (nitenpyram) tablets and revised the EUA for Nitenpyram Tablets, the generic version of Capstar, to authorize both products for the prevention and treatment of New World screwworm (NWS) infestations (myiasis) in dogs, puppies, cats, and kittens that weigh at least two pounds and are at least four weeks old. Nitenpyram Tablets were initially authorized in June 2026 for treatment only.

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