If you decide to take a statin, you must supplement with CoQ-10.

Statins block the production of CoQ-10 that normally occurs in our livers to keep us normal. The enzyme that makes both CoQ-10 and cholesterol is blocked by statins.

If you become low in CoQ-10 your mitochondria cannot make energy properly for your cells, and various bad things then happen as a consequence. Heart effects leading to congestive heart failure, high blood pressure, angina, rhythm problems, immune problems, gum disease and fatigue are results of low CoQ-10 levels.
You will need at least 100mg -300mg a day of this, and choose a form with enhanced absorption listed on the label, as this is not easily absorbed from supplements.

Simvastatin is the most lipophilic statin, which means it passes into the nerve tissue easily...hence it is suspected of causing more damage in the brain and nervous system. New studies show it blocks the natural repair processes called remyelation of the axons of the nerves.