Coupons Simparica TRIO is a chewable pill given once monthly that prevents fleas, ticks, heartworms, and some other intestinal parasites! Click here to claim your rewards for your purchase of Simparica, Simparica TRIO, Revolution Plus, Rimadyl, Apoquel, and Convenia Simparica is a chewable pill given once monthly that prevents fleas, ticks, and some other intestinal parasites! Buy 12 and get an instant $15.00 rebate Click here to claim your rebate Buy 3 get 1 free, or buy 6 and get 3 free!