There is no such thing as when to take Alfacalcitol tablets for the best results, the instructions for the drug do not emphasize the time of taking it, and whether it is taken before or after a meal has no effect on the results. Considering the adverse effects of this drug, it is recommended to take the drug after meals. Alfacalcitol tablets are mainly used to improve chronic renal insufficiency, rickets, hypoparathyroidism, osteoporosis, vitamin D metabolism abnormalities and other diseases. When taking this medication, some people may experience adverse reactions such as loss of appetite, nausea, vomiting, and skin itching. It is recommended to take the drug after meals, which can effectively avoid gastrointestinal adverse reactions such as loss of appetite, nausea, vomiting and abdominal pain. Hypercalcemia is prohibited, and pregnant women should not apply. This drug needs to be taken under the guidance of a doctor, and during the use of the drug need to cooperate with the doctor to closely monitor the blood calcium, urine calcium levels, timely compliance with the doctor’s instructions to adjust the dose, the occurrence of hypercalcemia, immediately stop the drug and seek medical attention.