re: Dog just had a seizure

Punkin, what kind of heartworm preventative do you give your dog? Our big lab had one mild seizure and it followed us giving him Simparica.

From: LINK / (just one of many reports you can find)

"Simparica, Nexgard, Bravecto and Credelio are all drugs in the isoxazoline class. They attack the neurological systems of biting fleas and tickets, killing them. While sales have skyrocketed over the last five years they’ve been on the market, information about some troubling side effects is coming to light."