Simparica is an easy to eat monthly chewable tablet that fights away fleas, tick, mites and mange. The benefits of Simparica include Kills fleas within 3 hours with a complete kill in 8 hours after treatment. Offers fast relief from itching and scratching, even for dogs with skin problems. Cleans up flea infestations in the home, within 14 days up to 95.6% of parasites in your dog's surrounding area will be left for dead. It's protection that's fast and lasts.