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My cat's glucose is high. Could asthma meds be causing diabetes?

Updated On September 23rd, 2025

Pet's info: Cat | Himalayan | Male | neutered | 11 years and 7 months old | 14 lbs

cat with asthma, diabetes, and urine crystals. currently on RC urinary SO food. prednisolone only when asthma gets bad otherwise flucitasone inhaler. recently high glucose levels in blood test. vet said to wait 3 weeks and not give him any pred or flucitasone to see if its actually diabetes or pred is causing it. asking for 2nd opinion and what i can do?

1 Answer

Most Helpful Answer

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Answered By Lauren Kennedy, DVM

Veterinarian

Published on April 12th, 2019

Chronic steroid usage can predispose cats to developing diabetes. If your cat’s asthma is currently stable then I think it is reasonable to stop medication and see how the blood glucose responds. If you aren’t comfortable with this, or you are concerned she won’t do well if you stop the medications, then I would recommend talking to your vet about having a fructosamine level performed. This will give you an idea of how high her glucose has been over the previous 2 weeks. If it is high as well then you will most likely need to initiate insulin therapy. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck.

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