The numbers vary depending on the study, what Ed is referring to was a recent study of high dose
Simvastatin. Your were most likely on a much lower
dosage, either 10 mg, 20 mg or 40 mg. 80 mg is normally not prescribed expect in those with heart disease.
The main study for Simvastatin was the 4S trial which proved that the incidence rate for side effects at 40 mg of Simvastatin was 1 in 2,220 prescriptions. What is interesting is that the incidence rate in the placebo group was 1 in 2,223.