[anonymous]

@ Charlotta G

I have had good results using the Seresto collar on my terrier.

I had a dog that was diagnosed with idiopathic epilepsy and lived a long happy life on a low dose of phenobarbital.
No side effects noted.

I suppose anything is possible but I would be inclined to agree with your vet. In my experience, side effects from topical flea/tick remedies tend to be a localized rash where the solution was applied.