FDA says it confirmed new cases of brain inflammation linked to MS drug, bringing total to 13
NEW YORK — The Food and Drug Administration says it confirmed three new cases of a potentially lethal brain inflammation linked to the multiple sclerosis drug Tysabri.
There have been 13 reported cases of progressive multifocal leukoencephalopathy, or PML, since mid-2006. The reports are the first confirmed new cases since June. While the disease is rare, the FDA says the risk appears to increase as patients remain on Tysabri.
