Actually, magnesium may also help with muscle stiffness and spasm. I have never heard that it may help with IBS. I asked my neuro about magnesium, and he told me I could try it. He did tell me to stay away from zinc.
Diagnosed April 2007
Started betaseron -- May 2007 -- experienced allergic reactions after 2 weeks
Started copaxone -- June 2007 -- stopped after 4 1/2 months;experienced severe 5 IPIR's
Started tysabri -- December 2007
Stopped tysabri -- April 2008 (developed antibodies/severe reactions)