Had my Neph appt. yesterday. She put me on Sensipar and said parathyroid levels of 315 are only slightly over 300 but thought I should take it and see if the levels come down. Blood calcium levels are perfect. My parathyroid is overworking because of kidney disease and this is common. I only have to take it 3 times/week and that can be reduced to 1/week. I'm not liking the side effects I see online. Surgery can create secondary hyperparathyroidism as well. I would not rely on the internet regarding this one. There are primary and secondary "hypo"parathyroidism and "hyper"parathyroidism. It is important to understand the distinction. The endocrinologist and Nephrologist should work together on this one.