Vitamin D Replacement in Statin-Induced Myopathy

Inclusion Criteria: * male and female adults * identified by their physician as having myalgia with their statin medication. Exclusion Criteria: * Unexplained CK \> 4X upper limit of normal, at study entry, or on a statin medication in the past. * Severe myositis * Consumption in excess of 14 alcoholic beverages per week * Situations which will cause difficulty in interpreting the vitamin D and / or PTH. examples: * Present consumption of vitamin D supplements \> 1000 iu daily * Renal impairment (Estimated creatinine clearance \< 70 ± 14 mL/min/m2 in Males; and \< 60 ± 10 mL/min/m2 in Females) * Chronic liver disease or impaired liver function * Any contraindication for statin re-challenge Example: rhabdomyolysis or allergy to statins