Treatment with TYSABRI may come with side effects, including serious side effects. Every person is different and may react to medications differently.
TYSABRI increases your chance of getting a rare brain infection that usually causes death or severe disability. This infection is called progressive multifocal leukoencephalopathy (PML).
Go to What You Need to Know Before Taking TYSABRI to learn more.
Other serious TYSABRI side effects include:
Allergic reactions
Allergic reactions, including serious allergic reactions. Symptoms can include:
- hives
- itching
- trouble breathing
- chest pain
- dizziness
- wheezing
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- chills
- rash
- nausea
- flushing of skin
- low blood pressure
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- Serious allergic reactions usually happen within 2 hours of the start of the infusion, but they can happen at any time after receiving TYSABRI
- Tell your doctor or nurse right away if you have any symptoms of an allergic reaction, even if it happens after you leave the infusion center. You may need treatment if you are having an allergic reaction
Infections
TYSABRI may increase your chance of getting an unusual or serious infection, because TYSABRI can affect your immune system.
Liver Damage
TYSABRI may cause liver damage. Symptoms can include:
- Yellowing of the skin and eyes (jaundice)
- Nausea
- Vomiting
- Unusual darkening of the urine
- Feeling tired or weak
Blood tests can be done to check for liver damage. Call your doctor right away if you have symptoms of liver damage.
Other TYSABRI side effects include:
- headache
- urinary tract infection
- lung infection
- pain in your arms and legs
- vaginitis
- nose and throat infections
| - feeling tired
- joint pain
- depression
- diarrhea
- rash
- stomach area pain
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It is always important for you to communicate with your doctor. Let your doctor know right away if you are experiencing any side effects that bother you or do not go away.
These are not all of the side effects with TYSABRI. Ask your doctor for more information.
