“…When GFR falls below 60 milliliters per minute, PTH may not be fully excreted leading to hypercalcemia. All persons with impaired renal function should have calcium levels monitored (Patel & Wiggins, 2007). Hypercalcemia is also associated with hyperparathyroidism, hyperthyroidism, malignancy, milk alkali syndrome (a condition in which there are high levels of calcium and a shift towards metabolic alkalosis caused by drinking too much milk (which is high in calcium) and taking certain antacids, especially calcium carbonate or sodium bicarbonate (baking soda), over a long period of time), medications (e.g., thiazide diuretics, calcium, and vitamin D), and prolonged periods of immobility.…”