Vitamin AD drops, it is not necessary to take one capsule a day for 0~1 year old babies. The usual dosage for full-term babies is one capsule a day, but some special babies, such as preterm babies, must be taken under the guidance of a doctor. Vitamin AD drops are used to prevent and treat vitamin A and vitamin D deficiencies, and can prevent rickets and pediatric tetany. One capsule a day is sufficient for full-term infants. Note that it can not be used in patients with chronic renal failure and hypercalcemia. Vitamin AD drops are usually applied without adverse reactions, long-term or application of too large a dose may also lead to chronic toxicity of vitamins, skin itching, headache, vomiting, constipation, fever, etc., so it is necessary to take the recommended dosage, and part of the preterm infants need to be adjusted under the guidance of a doctor. The use of such drugs, it is recommended that you can consult the pediatric clinic of the regular hospital.