Treatment depends on the severity of symptoms and the underlying cause.
avoid thiazide diuretics, prolonged inactivity, high calcium diet
adequate hydration minimises risk of nephrolithiasis
saline hydration
bisphosphonates
calcitonin
References
Kelwade JV, Modi KD, Kumar N, Parekh H. Hypercalcemia and electrocardiogram changes. Indian J Endocrinol Metab. 2016;20(6):892-893. doi:10.4103/2230-8210.192900
Elizabeth Shane, Clifford J Rosen, Jean E Mulder.Diagnostic approach to hypercalcemia.: https://www.uptodate.com/contents/diagnostic-approach-to-hypercalcemia
Elizabeth Shane, Clifford J Rosen, Jean E Mulder.Clinical manifestations of hypercalcemia
Elizabeth Shane, Clifford J Rosen, Jean E Mulder. Treatment of hypercalcemia. https://www.uptodate.com/contents/treatment-of-hypercalcemia