alfacalcidol /al″fah-kal′si-dol/ , a synthetic analog of calcitriol, to which it is converted in the liver. It is used in the treatment of hypocalcemia, hypophosphatemia, rickets, and osteodystrophy associated with various medical conditions, including chronic renal failure and hypoparathyroidism. Alfacalcidol is administered orally or intravenously.
