FDA Approves First OTC Screwworm Treatment for Pets

Pet owners facing the threat of New World screwworm just gained a powerful new weapon in the fight to protect their animals.

The FDA issued an Emergency Use Authorization this week for the first generic over-the-counter treatment approved for dogs and cats exposed to the dangerous pest. The medication is available in two dosage strengths based on an animal's weight and kills most screwworm larvae within hours of the first dose.

The authorization comes as federal and state animal health agencies continue working to contain the pest following multiple confirmed cases in Texas. New World screwworm, a parasite that infests open wounds on warm-blooded animals, had been eradicated from the United States decades ago but recently reappeared.

U.S. Secretary of Health and Human Services Robert F. Kennedy Jr. emphasized the government's commitment to stopping the pest's spread. He noted that the approval builds on an emergency declaration signed in August 2025 and provides an affordable, accessible treatment option for companion animals in affected regions.

The treatment adds another layer of protection as veterinarians and pet owners work alongside the USDA and state agencies to prevent further infestations. Officials say the fast-acting medication gives families peace of mind while containment efforts continue.

The Ripple Effect

This authorization does more than just treat individual pets. It strengthens the entire containment strategy by giving thousands of pet owners the ability to act quickly if their animals are exposed.

The availability of an over-the-counter option means families don't need to wait for veterinary appointments to begin treatment, potentially saving animals from serious harm. Early intervention is critical with screwworm infestations, and accessible treatment options help ensure no pet falls through the cracks.

The authorization applies specifically to companion animals, while separate treatment and prevention strategies remain in place for livestock producers monitoring cattle and other susceptible animals in affected regions. Animal health professionals now have multiple tools at their disposal to combat the pest across different animal populations.

Federal officials view the new treatment as a tactical addition to ongoing eradication efforts that include surveillance, biosecurity measures, and sterile fly production. Together, these strategies aim to eliminate the pest from U.S. soil once again.

Families in affected areas can now protect their beloved pets with a treatment that's both effective and easy to access.