Vitamin A, D, and combinations therapy is a form of treatment that involves administering these essential vitamins to patients who suffer from deficiencies or certain medical conditions. Vitamin A plays a crucial role in maintaining healthy eyesight, immune function, and skin health. Vitamin D, on the other hand, helps in regulating calcium and phosphorus absorption, supporting healthy bone development and growth, and promoting healthy immune function. Combining these two vitamins can help prevent and treat a range of medical conditions such as rickets, osteoporosis, and autoimmune disorders. Vitamin A, D, and combination therapies are often prescribed by doctors and can be found in different forms, including supplements, capsules, and injections. However, it is important to consult a healthcare professional before starting any vitamin therapy to ensure it is safe and appropriate for your condition.