My family member uses Humalog and it's patent expired in 2014 yet it's hundreds of dollars:
https://medcitynews.com/2019/03/lilly-to-introduce-lower-pri...
The problem is that there isn't competition on the market for this product. The Open Insulin people were trying to make it available to the public but they are stuck trying to get through the regulation.
It's entirely possible that if we got rid of the regulation then the whole problem takes care of itself and it becomes a non issue.