This medication is used to treat people with serious
kidney disease who have high levels of a certain natural substance (parathyroid
hormone-PTH), which your body normally makes. High PTH levels affect the
balance of other minerals in your body (calcium and phosphorus) and may result
in weak bones. Doxercalciferol is a man-made form of vitamin D. It works by
decreasing PTH levels and increasing calcium/phosphorus levels in the
body.