Store unused Lantus vials in the refrigerator between 36˚F to 46˚F (2˚C to 8˚C)Store in-use (opened) Lantus vials in a refrigerator or at room temperature below 86˚F (30˚C)Do not freeze Lantus.Keep Lantus out of direct heat and light.If a vial has been frozen or overheated, throw it away.

Should Lantus be kept in the fridge?

Keep Lantus away from direct heat and light. After its first use, don’t refrigerate the Lantus SoloStar pen. Keep it at room temperature only (below 86°F). After 28 days, throw your opened Lantus pen away—even if it still has insulin in it.

What happens if unopened Lantus is not refrigerated?

Unopened and stored in this manner, these products maintain potency until the expiration date on the package. Insulin products contained in vials or cartridges supplied by the manufacturers (opened or unopened) may be left unrefrigerated at a temperature between 59°F and 86°F for up to 28 days and continue to work.