some info, supplied by Pet Pharmacy:
Comfortis: Flea Preventative In Dogs - 1800PetMeds
interesting: customer reviews, especially by Michael Dym, VMD Veterinarian "mixed feelings"
Quote
"... In my experience and opinion, I have also seen several dogs vomit when given this pill and it is really not supposed to be used in patients with seizure disorders, which is also a concern of mine in terms of safety...
For the reasons stated above, I therefore give this product an overall rating of 2 with effectiveness (for fleas) of 4, the ease of use a 5, and the taste a 4. I still prefer Front line, Advantage and K9 Advantix despite the oily spot because of the increased coverage of parasites, and my concerns about safety."
Comfortis: Flea Preventative In Dogs - 1800PetMeds
Pepper is suffering from Flea Dermatitis, and his Vet strongly recommended taking Comfortis. Still, I will not give Comfortis to Pepper, since he had seizures after he received his 3rd vaccination as a puppy.