I don't recall all the details, but there are other issues that can cause high calcium levels. Your body may be using up some of the calcium from your bones right now, something that long term use of prednisone can cause. It can lead to kidney stones. Unfortunately, this is from way too much experience. If there is free calcium in your blood, make sure your diet is low in oxalates (red meat and chocolate, two of my favourites, unfortunately are biggies) to reduce the risk. Take care.