Kills adult fleas, flea eggs, flea larvae and ticks Ì_ Contains (S) Methoprene Insect Growth Regulator to kill flea eggs and prevent reinfestation for up to 2 months Ì_ Repels mosquitoes Ì_ For dogs and puppies 10 weeks of age or older Ì_ For cats and kittens 12 weeks of age or older Active Ingredients: (S) Methoprene 0.27%, Etofenprox 0.50%, Piperonyl Butoxide 1.75%.