After reintroduction, Tysabri builds patient base

A year after Tysabri was reintroduced for multiple sclerosis, its manufacturers say that 14,000 patients are now taking the drug. Tysabri, once viewed as a major breakthrough for MS, was pulled after the drug was linked to a risk of PML, a viral infection of the brain. Elan and Biogen Idec make the drug.

- read the report from Finfacts

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