Vitamin AD drops are recommended to be given to children up to about two years of age and may need to be taken for a longer period of time if a child is experiencing a true vitamin AD deficiency. If you are an adult taking vitamin AD drops, it is recommended that you take them as prescribed by your doctor and do not change the duration of your medication. The main ingredients of vitamin AD drops contain vitamin A and vitamin D. By supplementing with these two vitamins, you can promote the growth and development of your child’s body. Vitamin A contains retinol, which is a more important component of photoreceptor cells, epithelial cells, and other target cells in your child’s body. If your child’s body lacks vitamin A, it may cause impaired growth and development, vision problems, anemia, and recurrent respiratory infections. Vitamin D is an important regulator of calcium homeostasis in the human body, vitamin D can be transferred through the mother and the fetus, when the child is separated from the mother’s body, through breast milk is not enough to meet the full requirements of growth and development of vitamin D, so additional vitamin D. If the child has a vitamin D deficiency, this time it is easy to lead to the occurrence of rickets. In the early stage of rickets, the child may be irritable, irritable, restless sleep at night, frequent night awakenings, crying, excessive sweating, occipital baldness and other phenomena. In the acute stage of rickets, the child may develop skeletal changes such as square skull, chicken chest, funnel chest, rib margin ectropion, brachycephaly, ankylosis, O-shaped legs, X-shaped legs and so on. So it is recommended to give vitamin AD supplements to your child until about two years of age to ensure growth and development.