The FDA has recently issued a warning about four chewable flea and tick medications cautioning that they could lead to neurological issues such as seizures. The FDA is working with the manufacturers of Bravecto, Credelio, Nexgard, and Simparica to include a clear label on their product warning owners of the risk, but also encouraging owners to talk to their veterinarian about the appropriate preventative to use. This potential side effect has been known by the manufacturers and is not a new development.

The majority of pets treated with these products have not suffered any issues, but some dogs and cats have had seizures, muscle tremors, ataxia (loss of coordination, balance, and motor function control), and cognitive impairment.  The neurological issue might be more common in animals with a history of seizures, but has also occurred in pets with no history.

The FDA is stating that these products remain safe for most animals and the warning is intended to alert owners to a possible risk. Owners that are concerned should consult their veterinarian.



We recommend Nexgard at Loyal Companions because it has been proven to be a safe product. It has been on the market since September 2013 with no adverse side effects in our pets.

Nexgard protects our pets from the Lone Star Tick, Black-legged tick, American Dog tick and Brown dog tick which carry Lyme disease, Rocky Mountain Spotted Fever and Ehrlichiosis. It also kills adult fleas and prevents flea infestations.