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FDA Conditionally Approves Drug To Treat New World Screwworm in Dogs

Washington, D.C., December 17, 2025—Today, the U.S. Food and Drug Administration conditionally approved Credelio Quattro-CA1 (lotilaner, moxidectin, praziquantel, pyrantel) chewable tablets for the treatment of infestations caused by New World screwworm (NWS) larvae (myiasis) in dogs and puppies at least eight weeks of age and weighing at least 3.3 pounds.