Finally no need to buy a flea killer and a monthly flea control medicine, Get them both in one capsule....6 x 210mg Lufenuron + 15mg Nitenpyram in each capsule for cats 2 to 15LB (up to 8LB cats use 1/2 a capsule) * Once a month Flea control Oral regiment (compare to Program ®+Capstar) Together * Lufenuron kills flea eggs & larvae +Nitenpyram Kills Adult Fleas instantly. * TUNA FLAVORED Capsules can be given whole or opened and sprinkled over Cat food BUT HAS TO BE GIVEN WITH A FULL FATTY FATTY FATTY MEAL * NO SIDE EFFECTS OR TOXICITY have ever been reported even in animals fed hundreds of times the recommended dose.... PLEASE BE AWARE of people who leave a 1 STAR negative rating without having the orange phrase " Amazon Verified Purchase " under their name, these are people who DID NOT BUY THE PRODUCT.