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My cat is itching and scratching after Revolution. Is it an allergy?

Updated on September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 1 year and 6 months old | 13 lbs

Is it possible my cat is allergic to revolution?? Have used it 3 times, spaced out monthly and over the course of the 3 months, my cat has become worse with more itching, scratching self all over, biting self to the point he now has two open wounds below the neck. And I know it's most definitely not a food allergy. And he doesn't go outside. I'm beginning to think it's the revolution treatments that have caused it as each time he became worse.

2 Answers

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on March 24th, 2020

Yes, it certainly could be Parker is having a reaction to the Revolution. I'd have him seen by a vet asap to get this itching and wounds treated and to discuss another flea medication for him. An oral one may be better.
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Related Answers from Veterinarians

  • Answered By Dr. Davis

    Veterinarian

    Published on March 12th, 2018

    Some cats do get a skin irritation from Revolution. I’m glad the fleas are gone, Revolution is very effective that way. I would wash the application area with a warm damp cloth to remove any Revolution that is still on the skin. If he can’t reach the area to lick you can use a thin film of hydrocortisone cream on the sore to stop the itching. If he’s itchy all over a cool bath with a hypoallergenic shampoo may soothe the skin. If he continues to be lethargic and overgrooming then your veterinary should do and exam to make sure it’s just a skin reaction and they can then give an anti inflammatory injection which should make him more comfortable. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Mio.

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    2Pet Parents found this answer helpful

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