Elanco's Negasunt™ Powder (Coumaphos, Propoxur, Sulfanilamide Topical Powder) and Tanidil™ (Coumaphos, Propoxur) Receive Emergency Authorization for Use Against New World Screwworm in Livestock

Action Prepares Veterinarians and Livestock Producers with Prevention and Treatment Options Prior to Fly Being Detected in the U.S. Federal agencies grant emergency authorizations for New World screwworm in livestock, reinforcing Elanco's leadership in livestock health innovations   Actions underscore the commitment of the U.S. Food and Drug Administration, U.S. Environmental Protection Agency, and U.S. Department of Agriculture to act swiftly against emerging animal health threats  Early detection and immediate treatment of open wounds on livestock is critical to prevention of New World screwworm myiasis in individual animals and rapid spread of the pest An effective fly and tick control regimen is also essential, helping to avoid small bites on animals that can be an entry point for the screwworm INDIANAPOLIS, April 27, 2026 /PRNewswire/ -- Elanco Animal Health Incorporated (NYSE: ELAN) announced it has received Emergency Use Authorization (EUA) from the U.S. Food and Drug Administration (FDA) for Negasunt Powder (coumaphos, propoxur, sulfanilamide topical powder) and a Section 18 Emergency Exemption from the U.S. Environmental Protection Agency (EPA) in cooperation with the United States Department of Agriculture (USDA) for Tanidil (coumaphos, propoxur) for the prevention and treatment of New World screwworm infestations in a variety of livestock species. With confirmed cases of New World screwworm detected as close as 62 miles south of the U.S.-Mexico borderi, these authorizations ensure veterinarians and livestock producers have a ready-now treatment option for various livestock species should the fly enter the U.S. Negasunt Powder and Tanidil will be available only through the U.S. Animal Plant Health and Inspection Service (APHIS) and its National Veterinary Stockpile.