Levemire/ novolog

So here’s my question now, is I utilize all my levimere in its 28 day’s, but hardly go through 10-15 units in the 28 day’s do I keep using it and ignore the expiration or just waist all that insulin. 300 unit pens.

I’ve used Levemir for 6-8 weeks without noticing any change in potency. When I was on Lantus, it was a goner by 28 days.

I have found that leaving the pen in the fridge between usages extends its life, vials also. At the first hint of unexpected highs, give it up. Not worth it.