Vetality Avantect II contains imidacloprid, permethrin and pyriproxyfen – the active ingredients found in K9 Advantix II? for dogs*. Vetality Avantect II is vet quality protection but costs less than the national brand. These broad spectrum topicals not only KILL but REPEL fleas, flea eggs, ticks & mosquitoes. Avantect II also kills ALL stages of fleas, repels biting flies and kills lice. Available in four convenient weight breaks and a four-month supply for continued protection. Do not use Vetality Avantect II on cats.