3/8/06-9;08 a.m.-CNN.com - "Only one prescription drug has ever been returned to the market after being pulled because of dangerous side effects. Tysabri, a promising multiple sclerosis drug, could become the second. [click for more]":

"Federal health advisers are reviewing studies about Tysabri's risks and benefits, along with testimony from multiple sclerosis patients who tearfully pleaded for the drug's return.

Tysabri has been linked to a potentially fatal brain infection called progressive multifocal leukoencephalopathy, or PML. The drug's manufacturers voluntarily pulled it from the market last year, following the deaths of two patients. The drug had been sold for just four months.

Dozens of multiple sclerosis patients told a Food and Drug Administration advisory committee Tuesday that they should be allowed to choose whether to take Tysabri.

"I am at the end of my road, in terms of what I can take. I want it to be my choice," said Barbara Crooks, 48, shortly before testifying. She and her husband, David, traveled from the Pittsburgh area to speak."