Interferon Beta-1b
Interferon Beta-1b is an immunomodulatory medication used to treat certain forms of multiple sclerosis (MS). It is a genetically engineered protein that modifies the body's immune response, though its exact mechanism in treating MS is not fully understood.
Interferon Beta-1b is a disease-modifying therapy used to reduce MS flare-ups and slow disability progression.
Key facts at a glance
- ATC
- L03AB08
- RxNorm
- 72257
- Generic
- Interferon Beta-1b
- Class
- atc-l03
- Brands
- Betaseron, Extavia
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- injection
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Treatment of relapsing forms of multiple sclerosis, including clinically isolated syndrome, relapsing-remitting MS, and active secondary progressive MS in adults.
The exact mechanism of action is unknown. It is believed to work by reducing inflammation and modulating the immune system's response against the myelin sheath in the central nervous system.
Administered via subcutaneous injection. May cause flu-like symptoms, injection site reactions, and requires regular blood monitoring. Contraindicated in pregnancy and in patients with a history of severe depression or suicidal ideation.
Official drug label
WellAlly may earn a referral fee from linked resources at no extra cost to you. Editorial content is never influenced by commercial relationships.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy