I know that opened insulin is good for at least 30 days at room temperature, but does anyone have advice on how long I can keep opened insulin in the fridge?
Reason I ask is that I have started using Insulatard in my fight against dawn phenomenon. So far so good but the thing is, I only use 1 unit a day and the pen contains 300 units. If I keep it at room temperature, I'll have to throw it out with more than 250 units still in it.
I don't have to pay for my insulin but I hate throwing it out like this. I was wondering if I could just keep the opened pen (it only comes in pen format) in the fridge so it could last longer? Also is there anything wrong with injecting cold insulin? I was told it stings?