Been on Atorvastatin 10mg / day for 20 years.
Was initially prescribed Simvastatin, but, it produced hang-over type side effects, without the benefit of alcohol.
No side effects I am aware of. Initially, my GP wanted to increase the dose, but, I resisted this. His alternative suggestion was to increase physical activity levels (which is one reason why I returned to cycling at age 50), this has had the desired effect, ie 10Mg dose, plus regular exercise, and a little bit of attention to diet. By desired effect, I mean Cholesterol within guideline levels.