Generic Name: Natalizumab (na ta LIZ u mab)
Brand Name: Tysabri
Medically reviewed on May 2, 2018
- A very bad brain problem called progressive multifocal leukoencephalopathy (PML) has happened with Tysabri (natalizumab). It may cause disability or can be deadly. Tell your doctor right away if you have signs like confusion, memory problems, low mood (depression), change in the way you act, change in strength on 1 side is greater than the other, trouble speaking or thinking, change in balance, or change in eyesight.
- Watch for side effects while getting Tysabri (natalizumab) and for 6 months after your last dose.
- You may only get Tysabri (natalizumab) through a special program. Talk with your doctor.
Uses of Tysabri:
What do I need to tell my doctor BEFORE I take Tysabri?
- If you have an allergy to natalizumab or any other part of Tysabri (natalizumab).
- If you are allergic to mouse proteins, talk with the doctor.
- If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
- If you have had a brain infection called progressive multifocal leukoencephalopathy.
- If you are taking any of these drugs: 6-mercaptopurine, adalimumab, azathioprine, certolizumab, cyclosporine, etanercept, golimumab, infliximab, or methotrexate.
This is not a list of all drugs or health problems that interact with Tysabri (natalizumab).
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Tysabri (natalizumab) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
What are some things I need to know or do while I take Tysabri?
- Tell all of your health care providers that you take Tysabri (natalizumab). This includes your doctors, nurses, pharmacists, and dentists.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- Some people have had side effects within a few hours of the start of the infusion. Tell your doctor if you have any bad effects during this time.
- You may have more chance of getting an infection. Wash hands often. Stay away from people with infections, colds, or flu.
- Talk with your doctor before getting any vaccines. Use with Tysabri (natalizumab) may either raise the chance of an infection or make the vaccine not work as well.
- This medicine is not approved for use in children. Talk with the doctor.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Tysabri (natalizumab) while you are pregnant.
- Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.
How is this medicine (Tysabri) best taken?
Use Tysabri (natalizumab) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- It is given as an infusion into a vein over a period of time.
What do I do if I miss a dose?
- Call your doctor to find out what to do.
See also: Dosage Information (in more detail)
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Signs of infection like fever, chills, very bad sore throat, ear or sinus pain, cough, more sputum or change in color of sputum, pain with passing urine, mouth sores, or wound that will not heal.
- Signs of a urinary tract infection (UTI) like blood in the urine, burning or pain when passing urine, feeling the need to pass urine often or right away, fever, lower stomach pain, or pelvic pain.
- Signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.
- If you are planning to harm yourself or the want to harm yourself gets worse.
- Low mood (depression).
- Very upset stomach or throwing up.
- Shortness of breath.
- Chest pain or pressure or passing out.
- Vaginal itching or discharge.
- Period (menstrual) changes.
- Swelling in the arms or legs.
- Very bad and sometimes deadly infections of the brain or spinal cord caused by herpes viruses have happened with Tysabri (natalizumab). Call your doctor right away if you have a sudden fever, very bad headache, or feel confused.
- An eye problem caused by herpes viruses has happened with Tysabri (natalizumab). Sometimes this has been very bad and has led to loss of eyesight in some people. Call your doctor right away if you have a change in eyesight, eye pain, or eye redness.
What are some other side effects of Tysabri?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
- Upset stomach.
- Loose stools (diarrhea).
- Belly pain.
- Feeling tired or weak.
- Joint pain.
- Back pain.
- Pain in arms or legs.
- Muscle cramps.
- Signs of a common cold.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.
See also: Side effects (in more detail)
If OVERDOSE is suspected:
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
How do I store and/or throw out Tysabri?
- If you need to store Tysabri (natalizumab) at home, talk with your doctor, nurse, or pharmacist about how to store it.
Consumer information use
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else's drugs.
- Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
- Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
- This medicine comes with an extra patient fact sheet called a Medication Guide. Read it with care. Read it again each time Tysabri (natalizumab) is refilled. If you have any questions about Tysabri (natalizumab), please talk with the doctor, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
More about Tysabri (natalizumab)
- Tysabri Side Effects
- During Pregnancy or Breastfeeding
- Dosage Information
- Drug Interactions
- Compare Alternatives
- Support Group
- Pricing & Coupons
- En Español
- 81 Reviews – Add your own review/rating
- Drug class: selective immunosuppressants