How does it work?
Advantage® II is not absorbed internally when applied to the skin. It spreads in a thin layer and remains locked in the oil of the pet’s skin. Contact by the parasite with the treated hair coat and skin results in paralysis and death of fleas and lice.
Advantage® II not only kills adult fleas through contact, the product also contains the insect growth regulator pyriproxyfen which is distributed into the home on fur and skin shed by the dog and prevents flea eggs and larvae from developing into the next stage of the flea life cycle, effectively killing them, too!