- Áú¹®³»¿ë - I'm on business s gra 100 pills The Food and Drug Administration is investigating a reported case of the brain infection progressive multifocal leukoencephalopathy in a patient taking the Novartis MS drug Gilenya in Europe. The regulator announced the investigation Thursday and said in a statement that this is the first case of PML reported in a Gilenya patient who has not taken Biogen Idec's Tysabri, which the regulator notes has been associated with a higher risk of PML.
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