I've been suspecting for some time the Lantus is reaching the end of its life -- I'm down to about 1/8 of the vial, and it may not be as clear as it was
Mialia started using it in February, I think, her dear Carbon crossed the rainbow bridge in late April; I finally hooked up with her in early July and have been using it ever since, so that's 7 months from first puncture, though actually IN USE for something like 5 months, refrigerated all the time
I've been assured and re-assured, that it should be good for going on a full year, should be able to use it to the last drop -- when I got it, it was about half gone, now down quite a bit more (partly because I've been drawing more than the dose I actually give, I've had to expel persistent bubbles)
I also got a pen from her, not sure if it has ever been used -- I THOUGHT I had gotten another unused pen from heirs selling off their father's leftover insulin, but when I went to check expiration dates, I found they'd given me NOVOLOG not Lantus, even though they had advertised it as such
not sure if it is worthwhile keeping it, or finding someone who needs it and can recompense me
just got another pen of Lantus from a user switching to an insulin pump, supposedly always refrigerated, never used