I have been on insulin for several years. I have dealt with low sugars from time to time. Usually It drops in the lower 70's. I get it back up and I am fine. Saturday evening I took 30 units of lantus pen. Same as always. About 20 minutes later I felt a drop and my bg was 43. I don't understand why. And then for the past few days it has been like a yo-yo. Shooting up over 200 and then dropping. Could there be something wrong with the insuln in the pen?
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