Vitamin AD drops are oral preparations for vitamin A and vitamin D2 supplementation and should not be dropped into the nose. Vitamin AD Drops is a compound preparation, the main ingredients of which include vitamin A and vitamin D2. The drug is mainly used for the prevention and treatment of vitamin A and D deficiencies such as rickets, nocturnal blindness and pediatric tetany, and contraindications to the use of the drug include hypercalcemia, hyperphosphatemia with renal rickets, and chronic renal failure. The drug should be used orally, should not be dropped into the nose to avoid adverse effects, and long-term overdose can also lead to chronic poisoning, early poisoning symptoms can be manifested as itchy skin, dry lips and cracked lips, bone and joint pain, swelling, fever and so on. The specific use of drugs should be guided by a specialist physician, not unauthorized use of drugs.