Protect your dog from pests with TevraPet Activate II Flea & Tick Prevention Spot Treatment for Medim Dogs. This vet-quality topical flea and tick solution is made with imidacloprid, permethrin, and pyriproxyfen, the familiar active ingredients that pet parents know and trust. The waterproof formula works to repel and kill fleas, flea eggs, ticks, mosquitoes, and lice. It also repels biting flies and kills fleas before they bite, providing further protection from fly and flea-borne illnesses. TevraPet Activate II comes in easy-to-use, single-dose applicators. This formula is intended for use on dogs ages 7 weeks and older weighing 11–20 lbs.