<unk>  is a bone density conservation agent that is FDA approved for the treatment of hypoparathyroidism, refractory rickets, also known as vitamin D resistant rickets, and familial hypophosphatemia.   Common adverse reactions include constipation, nausea, vomiting.
Ergocalciferol
Doxercalciferol 
Cholecalciferol
Calcitriol 
Vitamin D
Retinol
Menadione
Calcipotriol