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My cat has fleas. Can I use Advantage and CapStar at the same time?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 2 years and 8 months old | 12 lbs

Can I use advantage and CapStar together for my cat for fleas?

3 Answers

Most Helpful Answer

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Answered By Rodrigo Roca, DVM

Veterinarian

Published on February 16th, 2018

Hello, yes you can use them together. Most importantly, is that you also treat your environment to rid of the fleas. You can use pet safe environmental insecticides, wash all bedding and clothing with hot water, and replace the vacuum bag after every use. Hope this helps and best of luck.

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30Pet Parents found this answer helpful

Other Answers

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on November 28th, 2016

    Great question! Yes it is fine to use Advantage II and Capguard at the same time. Capguard is a one time pill that starts killing fleas in 30 minutes, but doesn't provide lasting flea protection. The Advantage II will provide monthly protection from fleas as long as you apply it once a month. Be very sure to get the correct dose for Troy's weight, as cats are exquisitely sensitive to flea medications. You will also have to disinfect the environment. Wash his bedding in hot soapy water, and vacuum the furniture and carpet surfaces. You can use a spray to kill fleas in the house, such as Indorex, or a flea bomb would work well to kill the fleas in the home.

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    1Pet Parents found this answer helpful

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    Answered By C. Rathjens, DVM

    Veterinarian

    Published on July 28th, 2018

    Yes definitely. The capguard only last for 24 hours so you'll need to use a monthly preventive and you may also need to get your house treated for fleas if you're still finding anything on him with that combination. It's fine to use the capguard for 2 days in a row while starting the advantage, but beyond that he doesn't need both at once (although it wouldn't hurt him, just not needed). Good luck!

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    1Pet Parents found this answer helpful

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