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Why is my dog's belly red? Is it GI bleeding from fluoxetine?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 80 lbs

My dog has a dark red belly. He’s on fluoxetine and I’m concerned about GI bleeding…

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1 Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on January 3rd, 2023

Hi and thanks for your request. In this case, this red patch is not due to bleeding but to a skin inflammation. Gastrointestinal bleeding would result in darker feces or fresh blood inside them as first signs.

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