• Any time you give your pet medication, there is a chance of side effects
• Most dogs who take Comfortis don't see any negative side effects from the drug
• Some of the reported side effects for this drug can include diarrhea, vomiting, decrease in appetite and behavior changes
• Any time your dog acts differently or experiences new symptoms after starting a drug, it is best to check with your veterinarian to ensure the medication isn't reacting poorly to your pet
Please Note: HealthyPets.com does not carry Comfortis. The content on this page is for information and education purposes only. Consult with your Veterinarian for more information on Comfortis.