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Cat reacting badly to flea medicine: twitching and losing control?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | unneutered | 10 lbs

We put flea medicine on our cats but one of our cats can barely even move. It looks like he's twitching and loosing control of his body. He even bit me which is something he has never done before.

1 Answer

Most Helpful Answer

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Answered By Dr. Leigh, DVM

Veterinarian

Published on May 1st, 2017

I am not sure the type of flea medication that you used but it sounds like he is having a reaction to the medication. Some flea medications can be toxic to cats so he needs to be seen by a vet ASAP. If your vet is not open than you should take him to an emergency clinic for treatment.

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