hypoparathyroidism
"I have surgically induced Hypoparathyroidism. I was not monitored for many years. By the time I saw  my ENT, my vitamin D level was 780. I really thought I was dying. My Dr. said I had been suffering from vitamin D toxicity. She stopped the vitamin D and started me on calcitroil. It is a synthetic vitamin D and absorbs differently then vitamin D. It took a while for the toxicity to get better. I now take my meds differently. Prilosec 7 to 8am. Calcium/magnesium/zinc combo and calcitriol at noon, 5pm heart medicines, 9pm levothyroxine. This has worked so far great for me. Still occasional tetany. Overall better."