Hi Eric, yes we made the switch and I was happy with the results. I have said this before on other 's post who are switching but here is why I like Lantus.
~ There is a protocol to follow. I like if the numbers are here , this is what you do. I NEVER got the hang of a sliding scale with ProZinc.
~ Also, Lantus is longer lasting and more gentle that ProZinc. Prozinc curve is a smile. With Lantus, when you get regulated, it is a straighter line.
I understand you want to use up the ProZinc you have first. As far a cost, I would say they are c comparable. ProZinc uses U 40 syringes and Lantus uses U100 syringes and in the end about the same price. I get my U 100 syringes from Walmart and they are about 13 bucks for 100 syringes. You could check out the Supply Closet to see if any is up for grabs. A guy named Alan often post there and I bought some from him at a really good price. Also there is Marks Marine Pharmacy in Canada and when you are ready, let me know and I will give you the link. Making dinner right now.
When you are ready to make the switch, post in the Lantus/ Levemir forum a few day before to get dosing advice.