Does Gilenya Cause PML?

PML, Progressive Multifocal Leukoencephalopathy, a rare and sometimes fatal brain infection who’s symptoms are similar to Multiple Sclerosis, has always been synonymous with Tysabri (Natalizumab) but last Tuesday a case of PML was reported by a patient taking Novartis’ Gienya (Fingolimod). Gilenya is an oral DMD (Disease Modifying Drug) that was approved by the FDA in 2010 with the most common side effects being no more severe than headache, influenza, diarrhea, back pain, abnormal liver tests, and cough but now will we see PML be added to the list?

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