800.456.2255

Stories of strength

Celebrate the fighting spirit of people facing relapsing MS with TYSABRI's help.

Helping your doctor be a better partner

Hear a TYSABRI Fighter and a neurologist talk about the importance of the doctor-patient relationship.
The Powerful Choice

Discover the reasons Gene chose TYSABRI and why he believes his treatment helps him live well today.
Making the Switch

Once Jessica chose TYSABRI to help her fight her relapsing MS, she never stopped.
A Father’s Determination

After treating with TYSABRI for over 10 years, Gene is the same determined father he was before his diagnosis.

The TYSABRI Spirit

Keith + Liz + TYSABRI® (natalizumab)

Hear how Keith's diagnosis impacted his relationship with his wife Liz, and why their bond is as strong as ever.
Finding your inner strength

Watch Jessica tell the story of how her relapsing MS diagnosis helped her discover her inner fighter.
A reason to fight

See how Rick learned to be open with his family about his relapsing MS, even when it scared him.
A Father’s Determination

After treating with TYSABRI for over 10 years, Gene is the same determined father he was before his diagnosis.
The Powerful Choice

Discover the reasons Gene chose TYSABRI and why he believes his treatment helps him live well today.
From Fearful to Fearless

Learn how Jessica conquered her fears about relapsing MS to become the ultimate fighter.
Making the Switch

Once Jessica chose TYSABRI to help her fight her relapsing MS, she never stopped.

Taking TYSABRI

Discussing JCV Status

Watch a group of fighters explain why, for them, the benefits of TYSABRI outweigh the risks.
Turning to TYSABRI® (natalizumab) first

Hear a group of fighters explain why they chose TYSABRI as their first treatment.
Finding a community within

Discover how your infusion center can become a community all its own.
Infusing with
TYSABRI® (natalizumab)

Learn about the atmosphere at the infusion center from Heidi and her healthcare team.
Making the choice

Hear Courtney describe how she made the decistion to start TYSABRI by putting facts over fear.
Feeling in Control

Monthly infusions offer Gene “me time” and comfort in knowing his medication suits his lifestyle.
Keeping Tabs on the JC Virus

Gene is confident knowing that his healthcare team actively monitors his JC Virus antibody status.

Finding your voice

A fighting legacy

Watch a neurologist and a group of fighters discuss long-term treatment with TYSABRI.
Fighting words

Watch as TYSABRI fighters describe how they came to terms with their diagnosis.
Being a self-advocate

Find out how Stacy developed the confidence to speak for herself.
Knowledge can be empowering

Watch 2 TYSABRI Fighters describe how they use knowledge to conquer fear.
My Treatment, My Decision

Hear how Jessica advocated for herself by researching relapsing MS and asking her doctors about her treatment options.

Biogen Support Services

What is TYSABRI?

TYSABRI is a prescription medicine used to treat relapsing forms of multiple sclerosis (MS), to include clinically isolated syndrome, relapsing-remitting disease, and active secondary progressive disease. TYSABRI increases the risk of progressive multifocal leukoencephalopathy (PML). When starting and continuing treatment with TYSABRI, it is important to discuss with your doctor whether the expected benefit of TYSABRI is enough to outweigh this risk. 

It is not known if TYSABRI is safe and effective in children under 18 years of age.

IMPORTANT SAFETY INFORMATION

What is the most important information I should know about TYSABRI?

TYSABRI increases your risk of getting a rare brain infection—called progressive multifocal leukoencephalopathy (PML)—that usually leads to death or severe disability.

  • There is no known treatment, prevention, or cure for PML
  • You should not take certain medicines that weaken your immune system at the same time you are taking TYSABRI. Even if you use TYSABRI alone to treat your MS, you can still get PML
  • Your risk of getting PML is higher if you:
    • have been infected by the John Cunningham Virus (JCV). JCV is a common virus that can cause PML in people who have weakened immune systems, such as people taking TYSABRI. Before or while you receive TYSABRI, your doctor may do a blood test to check if you have been infected by JCV
    • have received TYSABRI for a long time, especially for longer than 2 years
    • have received certain medicines that can weaken your immune system before you start receiving TYSABRI
  • Your risk of getting PML is greatest if you have all 3 risk factors listed above. There may be other risk factors that have not yet been identified
  • Patients who are anti-JCV antibody negative are still at risk for the development of PML due to the potential for a new JCV infection or a false negative test result. Therefore, patients with a negative test result should be retested periodically
  • While you receive TYSABRI, and for 6 months after you stop receiving TYSABRI, it is important that you call your doctor right away if you have any new or worsening medical problems (such as problems with your thinking, eyesight, balance, or strength; weakness on 1 side of your body; and using your arms and legs) that have lasted several days. Tell all of your doctors that you are getting treatment with TYSABRI
  • Because of your risk of getting PML while you receive TYSABRI, TYSABRI is available only through a restricted distribution program called the TOUCH® Prescribing Program

Who should not receive TYSABRI?

Do not receive TYSABRI if you have PML or are allergic to natalizumab or any of the ingredients in TYSABRI.

What should I tell my doctor before receiving each dose of TYSABRI?

Before receiving TYSABRI, it is important to tell your doctor:

  • If you have a medical condition that can weaken your immune system, such as HIV infection or AIDS, leukemia or lymphoma, organ transplant, or others, or if you have any new or worsening medical problems that have lasted several days
  • If you are pregnant or plan to become pregnant. TYSABRI may cause low platelets, and in some cases also low red blood cells (anemia), in your newborn baby if you take TYSABRI while you are pregnant. It is not known if TYSABRI can cause birth defects
  • If you are breastfeeding or plan to breastfeed. TYSABRI can pass into your breast milk. It is not known if TYSABRI that passes into your breast milk can harm your baby. Talk to your doctor about the best way to feed your baby while you receive TYSABRI
  • About all of the medicines and supplements you take, especially medicines that can weaken your immune system. If you are not sure, ask your doctor

What are the possible side effects of TYSABRI?

TYSABRI can cause serious side effects. If you have any of the symptoms listed below, call your doctor right away:

  • Herpes infections. Increased risk of infection of the brain or the covering of your brain and spinal cord (encephalitis or meningitis) caused by herpes viruses that may lead to death. Symptoms include sudden fever, severe headache, or confusion. Infection of the eye caused by herpes viruses leading to blindness in some patients has occurred. Call your doctor if you have changes in vision, redness, or eye pain
  • Liver damage. Symptoms include yellowing of the skin and eyes (jaundice), unusual darkening of the urine, nausea, feeling tired or weak, or vomiting
  • Allergic reactions (e.g., hives, itching, trouble breathing, chest pain, dizziness, wheezing, chills, rash, nausea, flushing of skin, low blood pressure), including serious allergic reactions (e.g., anaphylaxis). Serious allergic reactions usually happen within 2 hours of the start of the infusion, but they can happen any time after receiving TYSABRI
  • Weakened immune system. TYSABRI may increase your risk of getting an unusual or serious infection
  • Low platelet counts. TYSABRI may cause the number of platelets in your blood to be reduced. Symptoms include easy bruising, small scattered spots on your skin that are red, pink or purple, heavier menstrual periods than are normal, bleeding from your gums or nose that is new or takes longer than usual to stop, or bleeding from a cut that is hard to stop

The most common side effects of TYSABRI are:

  • Headache, feeling tired, urinary tract infection, joint pain, lung infection, depression, pain in your arms or legs, diarrhea, vaginitis, rash, nose and throat infections, nausea, stomach area pain. If you experience any side effect that bothers you or does not go away, tell your doctor

These are not all of the possible side effects of TYSABRI. For more information, ask your doctor. To report side effects to FDA, please call 1-800-FDA-1088.

Please see full Prescribing Information, including Boxed Warning and Medication Guide.

This information does not take the place of talking with your doctor about your medical condition or your treatment.

Stay Connected

Sign up with us to receive the latest news, support information and upcoming events.

Please enter a valid email address.

About TYSABRI
Why TYSABRI? Safety considerations Long-term study Taking TYSABRI How TYSABRI works
Starting TYSABRI
Talking to your doctor The TOUCH Program Find an infusion site Infusion reminders
What is relapsing MS?
Learn about RMS
Personal stories
Blog Videos
Support & events
Biogen Support Services Support Coordinators Nurse Educators Financial & insurance assistance TYSABRI events Care partner resources

© 2022 Biogen. All Rights Reserved. 

This site is intended for residents 18 years or older of the United States, Puerto Rico, and US Territories.

All trademarks are the property of their respective owners.