I have been on Lipitor for several years. It never mattered what diet I ate or how much or little I exercised, my cholesterol was always between about 205 and 230. Since I started 20 mg Lipitor, it has never been above 140. I have never really noticed any side effects from it, and I have never had any explicit symptoms since my first episode (although I did have extra lesions show up w/o symptoms attached), so I have no idea whether it is the Lipitor or the Copaxone doing it.