How Long Does Avonex Last?

Generic: INTERFERON BETA-1A

Storage Conditions

Room temperature Refrigerate Do not freeze Protect from light

Manufacturer

Biogen Inc.

Storage Information

16.2 Storage and Handling Refrigerate AVONEX prefilled syringes and autoinjectors at 2°C to 8°C (36°F to 46°F) in the original carton to protect from light. DO NOT FREEZE. Once removed from the refrigerator, allow prefilled syringes and autoinjectors to warm to room temperature (about 30 minutes). Do not use external heat sources such as hot water to warm AVONEX. Should refrigeration be unavailable, a prefilled syringe or autoinjector may be stored at room temperature up to 25°C (77°F) for a period up to 7 days. DO NOT EXPOSE TO HIGH TEMPERATURES. Once the product is removed from the refrigerator, it must not be stored above 25°C (77°F). If the product has been exposed to conditions other than those recommended, DISCARD THE PRODUCT and DO NOT USE . Do not use beyond the expiration date. AVONEX Prefilled Syringe and AVONEX PEN contain natural rubber latex which may cause allergic reactions.

Important: This information is from federal drug label data and is for reference only. Always follow the specific expiration date printed on your medication packaging. Consult your pharmacist or healthcare provider with questions about medication storage or expiration.

Data source: View Avonex on DailyMed (NIH) | Federal drug label data.

Last verified: 2026-03-28