I was having high blood pressure problems starting about four years ago. My doctor put me on a dieuretic (water pill) along with my blood pressure medicine. I also have a GERD and take a stomach pill and eat a lot of tums. I have been running a high serum calcium level for several years now. I have had the following reading on serum calcium from 2007 to 2009. 10.5, 12.9, 10.9, 10.7, 11.0, 11.4, 10.6. I have had one PTH level done about a week ago and it was 46. I just had an ionized calcium level done and it was 5.7. I had a parathyroid ultrasound done last week and it did not show any parathyroid problems. I had a chest xray done and a test for sarcoidosis, it was negative. I have blood work out now to check for multiple myeloma. I discontinued the dieuretic last week and went on a dairy free diet per my doctor's orders. I asked him if this could be a parathyroid problem and he said no. He thinks it is being caused by the dieuretic. He is referring me to an endocrinologist. What do my doctor is on the right track?