The U.S. Food and Drug Administration is alerting pet owners and veterinarians that some flea and tick medications can cause adverse reactions in dogs and cats.

Some animals receiving drugs in the isooxazoline class have experienced adverse events such as muscle tremors, ataxia, and seizures, according to the FDA.

CBS 2 TV reports, the medicine includes Bravecto, Nexgard, and Simparica. Another product in this class is Credelio, which recently received FDA approval. The FDA says these products are approved for the treatment and prevention of flea infestations, and the treatment and control of tick infestations.

If your dog or cat experiences and adverse reaction, they say you should contact your veterinarian.