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Can I apply Frontline to my cat a week after Sergeant flea treatment?

Updated On September 23rd, 2025

is it safe for my cats to apply frontline after using sergeant's silver about a week ago, like, they have totally different ingredients, are they going to interact and harm my cats?

1 Answer

Most Helpful Answer

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Answered By Jenny, DVM

Veterinarian

Published on July 25th, 2017

Cats can be sensitive to flea medications. For that reason it is safest to wait 2 weeks between products even with different ingredients. Your vet can prescribe a cap star which is a pill that will last for a day that can help while you wait the remaining time

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