 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  may cause weak bones. Doxercalciferol is a form of vitamin D. It works by decreasing PTH levels and increasing calcium/phosphorus levels in the body. How to use Doxercalciferol Vial This medication is given by injection into a vein as directed by your doctor, usually 3 times a week (such as Monday, Wednesday, Friday) at the end of dialysis. The dosage is based on your medical condition, laboratory tests, and response to treatment. Your doctor may adjust your dose or temporarily stop this drug based on laboratory test results (such as PTH, calcium, and phosphorus levels). If you are using this medication at home, learn all preparation and usage instructions from your health care professional and the product package. Before using, check this product visually for particles or discoloration. If either is present, do not use the liquid. Learn how to store and discard medical supplies safely. It is very important to follow the diet recommended by your doctor to get the most benefit from this medication and to prevent serious side effects. Do not take more than 2 grams of calcium a day while you are taking this medication. Sources of calcium include your diet, phosphate binders, or calcium supplements. If you have any questions </s>