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Is my diabetic cat's Vetsulin insulin still good after being left out?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 12 lbs

Good evening. I have a diabetic cat that takes a Vetsulin insulin shot every 12 hours. This morning i accidentally left it in a drawer for 12 hours at room temperature. Is the insulin bad? Or is it ok being placed back in the refrigerator?

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on February 26th, 2018

The problem with insulin is that it cannot handle temperature variations. There is a small chance that it may still be ok, however it would be better to replace it with a new bottle to make sure Buddy is getting his proper working dose. If you are measuring blood glucose yourself at home, then you can measure his blood glucose before giving him his shot and then 6 hrs after giving him his shot. If the insulin is not working any more due to having been out of the fridge, then he will have a blood glucose value the same or higher than the first measurement. If his Blood glucose is lower and close to his usual low glucose level then the insulin is still good. However, I would recommend replacing the bottle with new insulin.

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