The study found that the patients on simvastatin achieved the target LDL level of less than 130, more than those on pravastatin
(65 percent on simvastatin versus
35 percent on pravastatin
). The most common side effects of the statins in general are nausea, gas, and upset stomach. Less common are headache, dizziness, rash, sleep disturbances, muscle pain, cramps, or weakness.