According to the manufacturer, Novo Nordisk , unopened Actrapid should be stored in the refrigerator between 2°C and 8°C. Opened Actrapid should be kept at room temperature. Do not store vials above 25°C and cartridges above 30°C. When travelling, storage is dependant on whether or not the medicine is already in use.
It is important to always check with your doctor before travelling with your medicine.