The fleas on your pet are in the adult stage. An adult female flea, living on a pet, can lay up to 2,000 eggs in her lifetime. With CAPSTAR® (nitenpyram), almost all adult fleas will be gone within 4 hours for dogs and 6 hours for cats.

CAPSTAR starts working in just 30 minutes. A single dose of CAPSTAR should kill the adult fleas on your pet. If your pet gets reinfested with fleas, you can safely give another dose as often as once per day.

CAPSTAR is safe for puppies and kittens 4 weeks and older, weighing 2 pounds or greater, as well as for pregnant or nursing dogs and cats.

In studies, over 90% of fleas are gone within 4 hours for dogs and 6 hours for cats after being treated with CAPSTAR Tablets.