Do not use Preotact: • if you are allergic (hypersensitive) to parathyroid hormone or any of the other ingredients of Preotact; • if you have had radiation therapy to the skeleton; • if you suffer from high calcium levels and other disturbances in the calcium-phosphor metabolism; • if you have other bone disease (including hyperparathyroidism or Paget’s disease); • if you have high levels of alkaline phosphatase; • if you suffer from severe kidney problems; • if you suffer from severe liver disease;