Multiple Sclerosis Treatment

Not all MS therapies have the same benefits. AVONEX is the only once-a-week MS therapy proven to slow disability and reduce flare-ups (or relapses). And it is effective after the first attack.

Compare injectable MS treatments

* People with MS in whom effectiveness has been demonstrated include people who have experienced a first attack and have lesions consistent with MS on their MRI. Please see the Patient Medication Guide.

Once-a-week AVONEX empowers you by effectively treating a range of the symptoms of MS:

Slows down physical disability

By choosing an effective treatment like AVONEX, it is possible to slow disability and help retain the daily functions that keep you in control of your life. AVONEX slowed down disability by 37% in a 2-year study.

Reduces the number of flare-ups (relapses)

Flare-ups are the worsening of one or more of your MS symptoms. A flare-up can also be a new symptom that lasts at least 1 day. Most flare-ups last a few days to a few weeks. Flare-ups may cause physical disability.

AVONEX reduces the number of flare-ups so you can go on with your daily life. And it starts working after the first attack. In people who have only had one flare-up, AVONEX reduces the risk of a second flare-up by almost half (44%).

Reduces brain lesions and the rate of brain atrophy

Lesions are a sign of the underlying damage MS has been causing to the brain and spinal cord over the years. AVONEX empowers you by effectively slowing down the formation of harmful brain lesions: AVONEX reduces the size of lesions by 91%

Brain atrophy is a condition where the brain shrinks in size as a result of losing brain tissue. In the second year of a clinical trial, people taking AVONEX had 55% less brain atrophy than people not on therapy.

Though studies suggest there is an impact, the exact relationship between MRI findings and your overall health is not fully understood

A trusted therapy for over 10 years, AVONEX is the ONLY MS therapy approved to be taken once a week. And since 1998, it has been the #1 prescribed MS therapy by healthcare providers in the U.S. and worldwide.

Learn more about the benefits of AVONEX in the section Why AVONEX?

AVONEX is an effective treatment against MS, but like all MS treatments, there are common side effects. Read the Important Safety Information about AVONEX to learn more.

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