Tysabri (Natalizumab) and PML – Update

Medical News: FDA Adds PML Risk to MS Drug Label – in Product Alert, Prescriptions from MedPage Today

A warning of a risk of progressive multifocal leukoencephalopathy has been added to the label for the multiple sclerosis drug natalizumab (Tysabri), the FDA announced. The labeling change was prompted by continuing reports of PML in MS patients. The current number of confirmed cases stands at 31 — 10 in the U.S. — up from 13 as recently as last September.