List of products in the National Drug Code with proprietary name . This medication is used to treat increased amounts of a certain hormone (parathyroid) in people with long-term kidney disease who are on dialysis. Dialysis treatment usually causes higher than normal amounts of certain substances (such as parathyroid hormone, calcium, phosphorus) in your body. This medication works by decreasing how much parathyroid hormone your body makes. This effect helps lower calcium and phosphorus levels in your blood. Having the right amounts of parathyroid hormone, calcium, and phosphorus in your body can help prevent bone problems.