On Mar. 10, 2026, the U.S. Food and Drug Administration (FDA) issued an Emergency Use Authorization (EUA) for F10 Antiseptic Wound Spray with Insecticide (benzalkonium chloride, polyhexanide, and cypermethrin topical solution) for the prevention and treatment of New World screwworm (NWS) infestations (myiasis).

The FDA has concluded that based on the scientific evidence available, it is reasonable to believe that F10 Antiseptic Wound Spray with Insecticide may be effective in the prevention and treatment of NWS myiasis in cattle, horses, minor species of hoof stock (e.g., sheep, goats, deer), raptors and other wild birds, pet birds, and captive wild, exotic, and zoo mammals, and the known and potential benefits of the product outweigh its known and potential risks. F10 Antiseptic Wound Spray with Insecticide may not be used in domestic dogs and cats.

Most animals in America are at low risk of NWS due to their geographic location; however, animals near the U.S.-Mexico border and those that have been in countries with active NWS cases are more likely to be exposed to NWS. To date, the FDA has conditionally approved or issued EUAs for drugs to prevent and/or treat NWS in cattle, dogs, and cats. F10 Antiseptic Wound Spray with Insecticide is the first product authorized by the FDA for NWS indications in additional species.