Vitamin AD drops can be administered for a long period of time, and this condition is carried out in preventive amounts, and the application of preventive doses can be administered to children for a long period of time. In particular, children can be treated prophylactically until the age of 3 years to prevent vitamin A deficiency and vitamin D deficiency rickets in children. Vitamin A deficiency in children can cause night blindness and recurrent respiratory infections, as well as dry skin. Vitamin D deficiency can cause a decrease in intestinal calcium absorption and lead to vitamin D deficiency rickets, so vitamin AD can be taken for a long time, but only on the basis of regular blood tests for vitamin A and D levels.