Uses: Cinacalcet is used to treat increased amounts of a certain hormone (parathyroid) in people with long-term kidney disease who are on dialysis. It is also used to treat increased amounts of calcium in people with cancer of the parathyroid gland. Cinacalcet works by decreasing the amount of parathyroid hormone, calcium, and phosphorus in your body. Having the right amount of these substances in your body helps to prevent bone disease.