Not-in-Use Pens: Store in a refrigerator (2-8°C). Do not freeze. Do not put Apidra Solostar next to the freezer compartment or a freezer pack. Keep the pre-filled pen in the outer carton in order to protect from light.
In-Use Pens: Pre-filled pens in use (or carried as a spare) may be stored for a maximum of 4 weeks below 25°C away from direct heat or light. The pen in use must not be stored in a refrigerator. Do not use it after this time period.