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Coconut oil on cat, then Frontline? Is it safe or effective?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 8 years and 5 months old | 15.4 lbs

I applied coconut oil on my cat's fur and skin to eliminate fleas. And a couple of hours afterwards I also applied Frontline Plus Spot-on Cat on the back of his neck. Is this dangerous for the kitty?Or will the coconut oil affect the results of Frontline? Thank you for your attention. Cristina

1 Answer

Most Helpful Answer

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Answered By Rebeccah Wood

Licensed Veterinary Technician, Registered Laboratory Animal Technologist

Published on October 22nd, 2017

Hello! Coconut oil may prevent the Frontline from being effective as the active ingredient uses the natural oils and pores in the skin to spread and work properly, and the coconut oil may prevent that from happening. There is no credible research that suggests that coconut oil works as a flea preventative or treatment, however Frontline is a well-tested and safe product for cats. If you would like to continue using Frontline, I suggest giving Clint a bath with a mild soap and water solution (to remove the coconut oil), waiting 24-48 hours for the fur to dry and from natural skin oils to be replaced, then applying the Frontline. Even if Clint had some Frontline applied already, the extra amount should not harm him as it is extremely safe and is not systemic (is not effective through the bloodstream). Good luck, and I hope that Clint becomes and stays flea-free!

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