Natalizumab
"I was diagnosed with MS is 2014 not long after I had optic neuritis in my left eye.  The neuro opthamogist misdiagnosed the optic neuritis as a mini stroke.  So sad too bad but you are blind in your left eye.  It took a hospital stay of a week before a neurologist finally got suspicious and ordered several tests, mostly MRIs and a spinal test before confirmed.  The problem was I was a 68 year old male, very fit from playing tennis 4 days a week and working as a pilot.  I was on two medications, copaxone followed by techfadera .  I failed on both as I had more symptoms and more lesions on the brain.  i am now on tysabri , am positive for the JC virus , monitored but doing tremendous.  A wonder drug.  I prefer quality of life versus quantity."