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My cat still has fleas after Avecta 2. How long until it works?

Updated On September 23rd, 2025

I used Avecta 2, flea and tick meds, for both my indoor cats, both still have fleas. How long does it take for this product to work, or should I reapply at a sooner date then 30 days? Any help is appreciated.

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on October 30th, 2018

It usually takes 24 to 48 hours to work, however, fleas only hop on the body of your pet when they want to feed, then they hop off again and stay in your pet's environment. So you need to treat all pets in the household as well as the environment (which contains the fleas, their eggs and larvae). Flea treatment:  1) Get some flea medication such as a Flea spray or a spot on from a pet shop or your veterinarian and apply monthly (Avecto will do) 2) get flea powder, put some in your vacuum cleaner bag and vacuum your house and furniture and also non-carpeted areas frequently to remove flea larvae and eggs which live off house dust., Dispose of the bag in the trash outside. Hot-wash all the pet's bedding, If you do this diligently for a few months you will get rid of the fleas.

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