Cinacalcet
"I have severe bone pain in my legs and frequent bowel movements up to fifteen times per day. Parathyroid scan showed nothing abnormal. After taking Sensipar only three days I saw marked improvement. After 28 day trial, pain in the legs is 80% improved, (am a multiply operated spine patient so did not expect 100%).  Bowel movements are more normal and once per day as they should be. This shows with just one month of treatment, that I do have parathyroid disease that was not picked up on scans. Now I can pursue treatment through surgery."