Is Comfortis the best flea treatment? Overall winner is Comfortis.
Comfortis not only kills fleas but works as a preventative that will continue to keep your dog safe from fleas.
Is Comfortis still available? Comfortis can be found in your veterinarian’s office—your source for the best pet health care advice.
What is replacing Comfortis? Capstar is a one-time use flea pill that can be used to eliminate an existing infestation. It’s a quick-acting oral tablet that begins functioning in 30 minutes and can be acquired at a low cost at BudgetPetCare.
What are the side effects of Comfortis? See the Comfortis label for complete safety information. For dogs: The most common adverse reaction reported is vomiting. Other adverse reactions reported in decreasing order of frequency are: depression/lethargy, decreased appetite, incoordination, diarrhea, itching, trembling, excessive salivation and seizures.