Contains fipronil and S-methoprene. It has a triple action approach for the control and prevention of fleas, ticks, and biting lice. The product is licenced for use on cats, dogs and can also be used to treat and prevent fleas and ticks on ferrets. Fipronil kills adult fleas, ticks and biting lice. The addition of S-methoprene to the already trusted ingredient fipronil, breaks the flea life cycle in the home by ensuring that any eggs laid by fleas on treated pets are infertile, and preventing development of flea larvae within a pet’s surroundings. Insecticidal efficacy against new infestations by adult fleas for up to four weeks in cats, eight weeks in dogs and up to four weeks in ferrets. This product has persistent acaricidal efficacy against ticks for up to two weeks in cats, four weeks in dogs and up to four weeks in ferrets. Legal Category: NFA-VPS.