FDA Links Popular Flea, Tick Medications To Neurological Problems In Dogs, Cats

Some flea and tick medications can cause adverse reactions in dogs and cats, the U.S. Food and Drug Administration warned Thursday. Some animals receiving drugs in the isoxazoline class, including products sold under the brand names Bravecto, Nexgard and Simparica, have experienced adverse events such as muscle tremors, ataxia and seizures, the FDA says.