Try not to take newborn vitamin AD drops and vitamin D drops together. This is because of the possibility of vitamin D toxicity. Vitamin AD drops are a compound preparation with vitamin A and vitamin D₂ as the main ingredients; vitamin D drops have vitamin D₃ as the main ingredient. Both preparations contain vitamin D, taken together may appear vitamin D overdose, long-term together, vitamin D long-term overdose, may appear vitamin D toxicity symptoms, the child may appear anorexia, nausea, lethargy, irritability, low fever, vomiting, weight loss and other symptoms. Therefore, vitamin AD drops and vitamin D drops should not be taken together. However, if your baby has a severe calcium deficiency and needs to take them together you must consult your doctor first and use them under his or her guidance.