Contains 9.1% Imidacloprid and 0.46% Pyriproxyfen.
Kills 98-100% of the fleas within 12 hours and prevents reinfestation for up to 4 weeks. Kills all flea life stages. Controls existing flea infestations and prevents future infestations.
On a farm with 5 dogs and lots of cats, Advantage works within hours and remains working well past a month for me, for years now. I was disappointed with Frontline in comparison, which took a few days and lasted only about 2 1/2 weeks...went right back to Advantage!
Have used for 5 years on cats/dogs and has cured my flea problem. Like the other viewer said, unlike Frontline which worked for a couple of years and then quit working.
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