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Simparica is a monthly chewable for dogs offering persistent protection from fleas ticks.In studies Simparica started killing fleas within 3 hours. By 8 hours fleas were virtually eliminated with a reduction of live fleas of 96.2% through day 35. Simparica achieves persistent tick control with continuous protection that rules out risky gaps. In well-controlled laboratory studies Simparica chewable tablets demonstrated > 96.9% effectiveness for 35 days against Amblyomma americanum Amblyomma maculatum Dermacentor variabilis and Rhipicephalus sanguineus.