K9 Advantix II Medium Dog gives your furry friend the ultimate protection with K9 Advantix II Extra Large Dog! This powerful monthly topical formula prevents and treats fleas, ticks, mosquitoes, biting flies, and lice for up to 4 weeks. It starts working within 12 hours and is waterproof after 24, plus it's fragrance-free and requires no prescription. 

Active Ingredients: Imidacloprid, Permethrin and Pyriproxyfen.

Suitable for dogs 11-25 Pounds