What is Avonex Prefilled Syringe (interferon beta-1a)?
Interferon beta-1a is made from human proteins. Interferons help the body fight viral infections. Interferon beta-1a is used to treat relapsing multiple sclerosis (MS). This medication will not cure MS, it will only decrease the frequency of relapse symptoms. Interferon beta-1a may also be used for other purposes not listed in this medication guide.