For adults with relapsing forms of multiple sclerosis (MS) to slow worsening disability and reduce number of flare-ups. Since TYSABRI increases the risk of PML, a rare brain infection that usually causes death or severe disability, it's generally recommended for patients unable to tolerate or respond well to another therapy. See TYSABRI Risk Information.

TYSABRI Site Map

Please see full Prescribing Information (PDF) , including Boxed Warning and
Patient Medication Guide (PDF) .

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