If it's kept in the fridge, probably 6 months. I don't really know. Our main concern with vials is that it gets a lot of needle pokes and bacteria or something could contaminate it after a while.
It's probably fine. I'm pretty sure I've read of someone on the board using a vial longer than 6 months. It really depends on the handling, IMO. Maybe do a board search for Levemir vial and see if you can fine others who've posted about this.
I've discovered the board search is pretty good, if you're willing to spend some time reading through threads to find what you're looking for.
I had a vial of lev that clearly lost it's potency within 2 months. If you're numbers are going downhill it never hurts to try a new vial. It's an easy (not cheap, though) fix if that's the problem!
I had a vial of lev that clearly lost it's potency within 2 months. If you're numbers are going downhill it never hurts to try a new vial. It's an easy (not cheap, though) fix if that's the problem!