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My cat's still sick with a fever and URI after 12 hours of meds?

Updated On September 23rd, 2025

Pet's info: Cat | Russian Blue | Male | neutered | 6 years and 4 months old | 9 lbs

My cat was acting differently when I arrived home yesterday afternoon (lethargic, hiding, no appetite, glossy eyes). He also had vomited at some point. He has a hx of a urinary blockage so I didn't hesitate and took him to an animal emergency clinic. They had to sedate him and vet said his bladder is fine, urine is good, had a fever of 104, suspects upper respiratory infection. Vet gave him Clavamox, Cerenia, and Polyflex. 12 hours later and I see no improvement.

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1 Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on November 12th, 2017

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Turbo! If the Vet suspected a URI they are usually viral in nature and the antibiotics are used to prevent secondary bacterial infections. I wouldn't expect a viral infection to resolve in 12 hours sadly. If Turbo still has a fever he may benefit from being hospitalized on IV fluids. If they didn't run blood work I would request full blood work including urine and Feline leukemia and FIV testing (even if previously tested as a kitten). If Turbo hasn't developed any signs of a URI he needs a work up for a fever of unknown origin, which requires blood work, feline retroviral testing, X-rays and possibly an ultrasound. These tests are trying to find a cause for the fever (infection, inflammation, cancer). I am hoping it is just viral and he needs more time. But sometimes that time needs to be spent in the hospital on fluids. I hope this helps and I wish Turbo a speedy recovery!

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