Vitamin ad drops are compound preparations, each capsule contains 1500 units of vitamin A and 3500 units of vitamin D. They are used for the prevention and treatment of vitamin A and D deficiency, such as rickets, night blindness and pediatric hand and foot convulsions. Adverse reactions: Chronic toxicity can be produced by long-term overdose, with early manifestations of bone and joint pain, swelling, itchy skin, dry lips, fever, headache, vomiting, constipation, diarrhea, and nausea. Contraindications: Chronic renal failure, hypercalcemia, hyperphosphatemia with nephrogenic rickets are contraindicated.