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Novolog Flexpen SubQ Storage
It is best to refrigerate the unopened vial/cartridges/prefilled syringes
between 36-46 degrees F (2-8 degrees C). Unopened insulin may also be stored at room temperature below 86 degrees F (30 degrees C), but in that case it must be discarded after 28 days. Once opened, this medication may be stored in the refrigerator or at room temperature below 86 degrees F (30 degrees C). Discard 28 days after opening. Do not freeze.