Can Comfortis Cause Seizures In Dogs?

Can Comfortis Cause Seizures In Dogs? Following concomitant extra-label use of ivermectin with Comfortis, some dogs have experienced the following clinical signs: trembling/twitching, salivation/drooling, seizures, incoordination, excessive dilation of pupils, blindness and disorientation. What happens if you give your dog too much Comfortis? At doses of approximately 2.5 times the recommended dose, spinosad caused vomiting