I don't know for sure, Sev. When my kitty was diabetic, we used PZI. It was an animal insulin. ProZinc is the replacement for it. It is marketed for diabetic cats. I honestly don't know if humans use a different labeled insulin or not. BCP is a compounded PZI insulin, thought by some to be the closest to the original PZI. But other vets don't like it because it is compounded and the quality might vary.
Good question and I am sure someone will know the answer.
You might search for ProZinc on the internet and PZI and BCP PZI.