I took Avonex for several month but couldn't stand the side effects, after having attact after attack I decided to take LDN, that is the best thing I have done, I've had no attacks since on it, 6 years ago, no side effects. I started with 3 mg. now I'm on 4.5 mg. I still have symptom now and then, but haven't been on steriods for 6 years.
Good luck on what you do.