(1) Discontinue taking vitamin D.

(2) Limit calcium intake if blood calcium is too high, including reducing intake of calcium-rich foods.

(3) Accelerate calcium excretion, oral aluminum hydroxide or disodium edetate to reduce intestinal calcium absorption, so that calcium from the intestinal tract; oral prednisone to inhibit the generation of intestinal calcium-binding proteins to reduce intestinal calcium absorption; can also be used to try calcitonin.

(4) Pay attention to maintain water and electrolyte balance.