AVONEX® (Interferon beta-1a) has the most treatment experience for relapsing forms of MS worldwide, with more than 135,000 patients on therapy. It is used worldwide as a treatment for relapsing forms of MS to slow the progression of disability and reduce relapses.
AVONEX is also approved for patients who have their first clinical MS attack and have a brain MRI scan consistent with MS.
The most common side effects associated with AVONEX MS treatment are flu-like symptoms, including myalgia, fever, fatigue, headache, chills, nausea, vomiting, pain and asthenia.
AVONEX should be used with caution in patients with depression or other mood disorders and in patients with seizure disorders. AVONEX should not be used by pregnant women. Patients with cardiac disease should be closely monitored. Patients should also be monitored for signs of hepatic injury. Rare cases of anaphylaxis have been reported.