Advantage cat flea treatment is easy to use. Simply squeeze the liquid onto the back of your cat's neck once a month. Advantage flea control for cats stops the painful flea bites in 3-5 minutes and starts killing the fleas in 20 minutes and carries on protecting your cat for 4 weeks. Advantage cat flea control also prevents any new fleas from hatching or hopping on from other pets. Advantage plus a wormer complete your cat's protection.