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Why did my cat's cystitis flare up again before finishing meds?

Updated on September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 11 years old | 9.9 lbs

I took my cat to vet and they were diagnosed with Cystitis give an injection and given Cystaid, and Metacam. It seemed to clean up and the cat was urinating normally. But after a few days it seems to have come back. The cat has not finished the 5 day course of medication yet. Is it normal for their to be another flair up of Cystitis before the medication is finished?

1 Answer

Most Helpful Answer

Christie Long, DVM

Answered By Christie Long, DVM

Veterinarian, Certified Veterinary Acupuncturist

Published on February 22nd, 2018

There can be flareups, but typically it's a signal that she needs to be checked again. The main reason is that there is a concern anytime there is inflammation in the lower urinary tract that the cat can suffer from a urinary blockage and become unable to urinate. If Sgt. Jellybean is still successful at passing urine, it's not an emergency, but you do need to follow up. If she's still getting Metacam orally at home and is now again having trouble, it's a sign that the inflammation isn't properly resolving. I would also recommend having x-rays made to ensure that there are no urinary stones that could be intermittently causing a blockage, if this hasn't been done.
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