FDA Conditionally Approves Topical Drug for Cattle for New World Screwworm and Cattle Fever Tick

Washington, D.C., December 4, 2025—Today, the U.S. Food and Drug Administration conditionally approved Exzolt Cattle-CA1 (fluralaner) topical solution for the prevention and treatment of New World screwworm (NWS) larval infestations, and the treatment and control of cattle fever tick in beef cattle 2 months of age and older and replacement dairy heifers less than 20 months of age.