By Bayer the flea specialist

Once a month topical flea treatment for cats and kittens 8 weeks and older.

Active Ingredient: Imidacloprid, and an insect growth regulator.

Usage: Cats once a month treatment to kill adult fleas, flea larvae and flea eggs. Controls existing flea infestations on cats and prevents further infestations for up to 4 weeks. Do not use on kittens under 8 weeks of age. Note: Read label carefully.