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My cat is itchy from outdoor allergies. Can OTC antihistamines help?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 15 years and 1 month old | 8 lbs

Hello, My cat has food and environmental allergy. We got good cat food for her and she is ok during cold season. From Spring to Fall is worst, she is very itchy, especially her ears and face area. We got steroids injections for her and it worked, but we do not want her to keep on steroids all the time. Any "ANTIHISTAMINES AVAILABLE “OVER-THE-COUNTER” would work for cats. Which one would be the best for my cat to treat outdoor allergies? Please help!

1 Answer

Most Helpful Answer

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Answered By Lindsey Edwards MVB, BSc, IVCA

Veterinarian

Published on May 19th, 2017

Antihistamines are very unpredicatable in cats and have varying but often poor results; the most useful effect is normally due to their sedative properties. There are other medications available for environmental allergies such as immunotherapy injections, cyclosporine which is fully licensed for use in cats and some vets have started to use the newer dog medication oclatinib in cats with some success also. I recommend you discuss these alternative options with your vet in order to reduce her steroid use

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