D-Forte 50000Iu 12 capsules – calciferol (Ergocalciferol) is vitamin d2 used to treat hypoparathyroidism (Decreased functioning of the parathyroid glands), and is also used to treat rickets (Softening of the bones caused by vitamin d deficiency) or low levels of phosphate in the blood (Hypophosphatemia). Calciferol is available in generic form.