We have been fighting some highs lately so I called the office to ask about what our CDE thought might be the cause. I asked her if she thought it might be because the Levemir was going bad, we are on day 28 or 29. It says in the leaflet that it is good for 42 days after opening (and till the expiration date unopened in the fridge). She told me that Levemir has a shelf life in the fridge of 2-3 years whether opened or unopened so long as it is kept in the fridge. That made me a little Is that true? Any ideas why she would say that?