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My 8-pound adult cat needs Benadryl. What's the right dosage?

Updated on September 23rd, 2025

My cat has a flea allergy and was given a steroid shot. I heard you can give cats benedryl. What would the dosage be for an adult cat that's 8 pounds.

1 Answer

Most Helpful Answer

Claudia Fioravanti

Answered By Claudia Fioravanti

Veterinarian

Published on July 17th, 2018

Hi, I think your cat flea allergy should settle after the steroids injection. However if your re just curious about doses for future references it would be 1 mg per pound, so for the liquid Benadryl 12.5 mg/5 ml, you probably need around 3 ml. Which does not look like a lot but it might be tricky to give to a cat ! Also you need to check the ingredients carefully to make sure nothing else is added that could be harmful to cats.
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