Advantage not working for cat fleas. Can I switch to Comfortis?

Question

Hi! I've tried advantAge on my outdoor cat for the past couple of months and it seems to work for about a week then I start seeing flea dirt on my bed where she sleeps. i don't want to use revolution. Is it safe to try something else after a week and a half ? I was thinking of trying capstar then giving her comfortis. ( when is it safe to follow up with something else after giving her the capstar and is one capstar enough ?)Any other suggestions? I heard frontline doesn't work well. thank you ! Pet's info: Cat | Domestic Shorthair | Female | spayed | 10 lbs

Jennifer Summerfield, DVM CPDT-KA · Accepted Answer

Hi there. I think your plan of using Comfortis instead is a good one. If you opt to do this, there's really no need to give the Capstar first, as the Comfortis will start working quickly on its own :) You can go ahead and do this now - the Comfortis should not have any harmful interactions with the Advantage, even if it was only applied a week or so ago.

Advantage not working for cat fleas. Can I switch to Comfortis?

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