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My cat licked Frontline. Will the flea spot-on still be effective?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 4 months old

Last night I applied Frontline Combo spot on onto my cat, but as she was quite naughty during the application, I believe I didnt apply it in the right spot. She licked some of it and hypersalivated for a minute and that passed. I am concerned that the spot on will not work correctly and it is very important that it does bc we had a flea infestation 3 weeks ago. Will it work efficiently?

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2 Answers

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on September 1st, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! It is okay that she licked some of it. It isn't harmful and she likely didn't ingest enough to decrease it's effect. I am sure you got it on well enough. You can re-apply as early as 3 weeks. Personally I do not think Frontline works well for fleas anymore. I like Comfortis, Advantage, Bravecto and the Seresto collar. I wish you the best!

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    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on July 13th, 2018

    It will still be effective, however put a t-shirt on your cat so he cannot lick it off for a few hours. Make sure the spoton was put on the skin inbetween the hair rather than just into the hair coat.

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