Vitamin D2 (Ergocalciferol) is approved by the FDA to treat Vitamin D deficiency and will be given according to approved labeling. This drug has not been systematically studied to test the potential benefits of Vitamin D in patients who suffer from statin-induced muscle pain. Vitamin D2 is the current standard of care for treating vitamin D deficiency. Since the investigators are using Vitamin D2 therapy to treat vitamin D deficiency, and because our trial is a pilot study, the data will not be submitted to the FDA for consideration of changing the labeled indications for Vitamin D2 therapy.