Does MS medicine work?

Medicines used to prevent attacks of MS are effective.  They reduce the frequency of attacks by 50% or more.  There are times when MS medicines do not work.

These are examples of when your MS medicine may not be working:

1) a moderate or severe attack / relapse of MS symptoms in the past 12 months

2) 2 or more mild attacks over a time of two years

3) 1 – 2 new enhancing lesions on MRI

4) 2 or more T2 / FLAIR lesions over 2 years

5) significant disability with walking, moving the arms or with thinking or memory