About 98 to 100 percent of adult fleas are killed on the pet within 24 hours by a topical spot application on the back of the neck on cats and between the shoulder blades on dogs. A single dose works for at least four weeks on dogs and up to four weeks on cats. Apply once a month. There is no waiting period to handle pets after application. Also, treated dogs immersed in water weekly for 30 days still experience nearly 90 percent flea control efficacy.
Program is safe for pregnant dogs and puppies, and cats and kittens as young as six weeks.
A dog is given one tablet once a month with a normal meal. Cats are given a tablet or a liquid dose once a month with a liquid meal. Nearly 100 percent of eggs laid by treated fleas do not develop. There is no effect on the adult flea. Tiny immature flea eggs, larvae and pupae may be hidden in carpets and upholstery or yard and dog houses, so it may take a few weeks to see how effective lufenuron works.