Adult 800 mg daily. Postmenopausal osteoporosis 0.25 mcg bd. Renal osteodystrophy (dialysis patients) 0.25 mcg, may be increased by 0.25 mcg/day for 2-4 wk intervals. Hypoparathyroidism & rickets 0.25 mcg/day, may be increased at 2-4 wk intervals.
Chronic hypercalcemia. Immobilized patients (eg those who have undergone surgery) are at risk of hypercalcemia. Renal failure. Avoid hypervitaminosis. Maintain adequate fluid intake.