I am the caregiver for my wife. She was tentatively diagnosed with MS in 1975 and confirmed by an MRI about 25 years ago. She took Betaseron for about 12 years and did have some relapses. About 3 years ago her diagnosis was changed to SPMS and taken off the injections. She currently takes 900 mg of gabapentin and 400 mg of Provigil each day. She has been in a wheelchair and on oxygen for the last 5 years. A new neurologist recommended that she take BIOTIN 150 mg twice a day. Has anyone on the forum had any experience with BIOTIN?