Improcal is indicated in-
- Post-menopausal osteoporosis
- Renal osteodystrophy
- Postsurgical hypoparathyroidism
- Idiopathic hypoparathyroidism
- Pseudohypoparathyroidism
- Secondary hyperparathyroidism in patients with moderate to severe chronic renal failure (pre-dialysis)
- Vitamin D dependent rickets