tevrapet activate ii flea and tick prevention for dogs | 8 months supply | medicine for treatment and control | topical drops (x-large 55+ lbs) tevrapet tevrapet activate ii for dogs contains imidacloprid, permethrin and pyriproxyfen, the active ingredients found in the leading brand. this broad spectrum topical not only kills but repels fleas, flea eggs, ticks and mosquitoes. activate ii for dogs also kills all stages of fleas, repels biting flies and kills lice. the package includes 8 applicators, each good for 1 month of protection. apply this product monthly for up to 8 months of protection for your pet and household. available in four convenient weight breaks and both four and eight-month supply for continued protection. only for dogs 7 weeks or older. not for use on cats. epa reg. # 92334-1-92413