Answer
Keep it refrigerated in its original carton, protected from light, and do not freeze it. Follow the pack instructions if it is removed from refrigeration.
Sources for this answer
- Dupixent 300 mg solution for injection in pre-filled syringe — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.