Diseases caused by disturbances in the Ca metabolism in consequence of reduced endogenous production of 1.25-dihydroxyvit D
3. Renal osteodystrophy, post-op or idiopathic hypoparathyroidism, pseudohypoparathyroidism, as an adjunct to the management of tertiary hyperparathyroidism, vit D-resistant rickets or osteomalacia, vit D-dependent rickets, neonatal hypocalcaemia or rickets, malabsorption of Ca, osteoporosis, malabsorptive & nutritional rickets & osteomalacia.