Overview Comfortis® (spinosad) Chewable Tablets are a fast, safe and effective flea treatment for flea infestations on your dog or cat.

  • Kills fleas and prevents flea infestations on dogs for a full month
  • Starts killing fleas in 30 minutes and was 100% effective within 4 hours in a controlled laboratory study
  • Chewable, beef-flavored tablet
  • Novel mode of action
  • FDA approved