I am, so far, grateful for TECFIDERA. I have been on it since early November, My first drug was Plegridy injections, and after 5 months I had a bad reaction, almost as though I was experiencing a relapse. Also injection site reactions As soon as I went off it, I recovered. Next drug was copaxone and four months into it I started getting severe, chills after a shot to the point I had to get in the shower for an hour, teeth chattering, and then extraordinarily weak, getting into sweats, under two down comforters and then shivering uncontrollably for an hour. Also injection site reactions, hot bumps that would not subside for weeks.Enough. So once again, jumping through. Pharma hoops and was put on Tecfidera since early November 2015. I always take it with food, take an antihistamine, and Aleve with it, and have had no reaction, so far. Next MRI will be in March and blood test. Time will tell.