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My diabetic cat's insulin is expensive. Any OTC human alternatives?

Updated on September 23rd, 2025

Pet's info: Cat | Domestic Longhair | Male | neutered | 7 years and 3 months old | 10 lbs

My diabetic cat is on proving insulin which is expensive. Is there an otc human equivalent insulin?

1 Answer

Most Helpful Answer

Sara Farmer, DVM

Answered By Sara Farmer, DVM

Veterinarian

Published on February 8th, 2019

I’m assuming you meant ProZinc insulin and if so there is unfortunately not a cheaper alternative. While less expensive human insulin can on rare occasions be used successfully in cats it usually does not provide good control of diabetes. You also need to start over with dosing and frequent monitoring when switching from one insulin to another which would increase cost. It’s probably best to stick with ProZinc if Mikey is well regulated.
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