Can ivermectin prevent New World screwworm in horses? The FDA has issued an Emergency Use Authorization for Ivermectin Liquid for Horses, but the authorization is limited to specific circumstances. It is prescription-only, provides short-term protection for no more than approximately 24 hours, and is not authorized to treat an existing screwworm infestation.In this video, we explain what the FDA’s New World screwworm emergency authorization means for horse owners, when ivermectin may be used, why it should not be administered routinely “just in case,” and why veterinary supervision remains essential.The authorization covers short-term prevention when Ivermectin Liquid for Horses is administered within approximately 24 hours after a foal is born or during the initial care of a fresh wound that could attract screwworm flies. It does not replace proper wound care, fly control, daily inspections, or treatment from a veterinarian.You will also learn:What New World screwworm isWhy screwworm larvae are particularly dangerousWhich horses may qualify for this medicationHow long the protective window lastsWhy this product cannot treat an active infestationWhy other ivermectin products should not be substitutedWhich wound changes require immediate veterinary attentionHow horse owners can reduce screwworm risksThe FDA issued this Emergency Use Authorization on July 15, 2026. According to the agency, the product is available only by prescription from a licensed veterinarian and is intended for short-term prevention—not treatment. Read the official FDA announcement.This video is provided for educational purposes only. We are not veterinarians, and this information should not replace professional veterinary advice. If you notice moving larvae, worsening tissue damage, unusual drainage, a foul odor, increasing pain, or another concerning change in your horse’s wound, contact your veterinarian immediately.Do you think this emergency authorization will help horse owners prepare for the threat of New World screwworm? Share your thoughts below, and subscribe to Scholarly Equestrian for continuing horse-health news and verified updates.Chapters: