There is a web site, hosted by an ex-astronaut, Dr. Duane Graveline, who discusses the similiarities between adverse reaction to statins and symptoms of things like MS.
When I first exhibted spasticity four years ago, I wondered if the relatively high doses of Pravacol I was taking could be related. When my current PCP switched me to Crestor, and I immediately collasped for 3 days, I decided to switch to Naicin (1000mg, twice a day). Since then, I have had no "classic" MS-like relaspes...only an occasional psuedo-exaccerbation.
I now begin to wonder if my cholesteral numbers are out of wack (hdl-120, ldl-65) and, as Dr. Graveline implies, cholesteral is actually a requirement for keeping the myelin sheath healthy.