Welcome to ThisIsMS, Solipsist.
For many different reasons, some of us have chosen not to do any MS medications (injectables or oral) at all. In my case, I tried three different injectables (Betaseron, Avonex, Copaxone) for about 10 years and saw no improvements. Scientists do not know the cause of MS, and until they do, I see no way they can find a truly effective treatment. Today's FDA-approved drugs for MS are no more effective than placebo.
Since I believe that excess insulin is deeply involved in MS symptoms, I think diet holds the greatest promise of controlling this disease. One dramatic example is found in the story of Dr. Terry Wahls and her regimen of diet and exercise: http://www.TerryWahls.com
I encourage you to read the Diet forum here at ThisIsMS. Do your reading, ask your questions – you know yourself best and will make the decision that is right for you. All the best to you.
My hypothesis: excess insulin (hyperinsulinemia) plays a major role in MS, as developed in my initial post: http://www.thisisms.com/forum/general-discussion-f1/topic1878.html "Insulin – Could This Be the Key?"