Re: using insulin after experation date
Yes, I agree you've got to be careful, and test, test, test. But I once had a mix-up with my mail-order pharmacy, and ended up with no extra insulin for several weeks. I used the expired insulin with no problems (it had been kept refrigerated, and while I don't usually keep an opened bottle in the fridge, I did with this one since it was past expiration date.) My blood sugars were fine, so apparently the insulin was still fine, too.
I no longer order my insulin through the mail, but get it at the local pharmacy. It's just too darned scary to have that happen.