Less common are headache, dizziness, rash
, sleep disturbances, muscle pain, cramps, or weakness. Both simvastatin and
pravastatin have the same side effect profile, but it does depend on the individual as to whether one would cause more issues than the other."
The only negative I have read about Simvastatin in recent times is a study that showed high doses of simvastatin of 80 mg puts a patient at a greater risk for side effects including muscle damage.