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My cat has anemia, inflammation, vomiting. How do antibiotics help?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 1 year and 3 months old

I adopted a cat a week ago. He is only 4lbs which didn't seem right. He wasn't eating & was vomiting a lot. Vet visit Saturday, after $500 and a bunch of testing they just told me he has severe anemia, inflammation... I'm waiting to hear about treatment but I wanted another experts advice... They said something about antibiotics but after reading up a little online. I don't understand how antibiotics will help. Isn't this a chronic disease? Please help. I want the best for this poor cat...

1 Answer

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on April 16th, 2018

Poor Ramsey! Of course, without doing an exam myself and seeing the results of the testing it is difficult for me to give a thorough opinion about what is going on. My concern with his age and being on 4 pounds is that this could be a chronic issue preventing weight gain or could have caused rapid weight loss. I definitely think the antibiotics are a good idea. Some antibiotics like metronidazole actually also act as an anti-inflammatory on the GI tract. I would make sure they have ruled out giardia and campylobacter which may or may not be a problem in your area. If he isn't improving, I would also talk to your vet about running a GI panel which checks his vitamin B12, folate and 2 pancreatic enzymes (PLI, TLI) to help rule out some other GI issues. Finally, you may consider putting him on a strict prescription hypoallergenic diet for 8-12 weeks to rule out any food allergies/sensitivities. I hope this helps! If you would like to discuss different possibilities and results of tests, please feel free to set up a consult with me. Thank you! I hope he starts to feel better!

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