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My cat is lethargic and isolating after UTI treatment. Is this normal?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 7 months and 28 days old | 5 lbs

A few days ago I noticed that my cat was trying to urinate often but nothing was coming out, and when something did come out it was bloody. Other than that her behavior was normal. I took her to the vet the next day and they put her on antibiotics and a painkiller. Since then she has seemed more lethargic and is isolating herself from me and the other cats. Is this something to be concerned about at this point?

1 Answer

Most Helpful Answer

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Answered By Rodrigo Roca, DVM

Veterinarian

Published on November 2nd, 2018

Hello, I am sorry to hear about Frito. The behaviors that you are describing could be consistent with a UTI, bladder stones, or a stress condition. Depending on what medications that Frito was placed on she may be experiencing mild sedating side effects and be isolating herself for that reason. However it is also possible that the increased lethargy and behavior could be a sign that she has continued to feel ill. It would be reasonable to have her rechecked by your veterinarian. UTIs can travel to the kidneys and cause a kidney infection if the antibiotic chosen doesn’t provide enough coverage. Alternatively she might being experiencing severe inflammation or having trouble passing a kidney or bladder stone. Your veterinarian may recommend bloodwork or poss of abdominal X-rays depending on exam findings. Hope this helps, good luck!

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