Clinical use of vitamin D₃ need to be used under the guidance of a physician, preventive dosage can be prescribed long-term use, but for infants and young children and other special populations can take vitamin D₃ from birth to two weeks of age.
Vitamin D₃ in the human body mainly play a role in elevating the role of blood phosphorus and blood calcium, can promote the absorption of calcium in the intestinal tract, clinically used in the prevention and treatment of vitamin D deficiency, but also can be used for chronic hypocalcemia, hypophosphatemia, rickets, infantile tetany and osteochondrosis and other diseases of the treatment.
Vitamin D₃ is contraindicated for those with hypercalcemia, hypervitaminosis D, hyperphosphatemia with renal rickets.
Prolonged use of vitamin D₃ may cause constipation, nausea, vomiting, loss of appetite, convulsions, arrhythmia and other adverse reactions, the occurrence of the above symptoms need to be promptly discontinued treatment.
For full-term infants usually start to take within 2 weeks after birth, usually take until the age of 2 years, the daily supplemental dose of 400μg, other people if you need to take for a long period of time, the specific dosage and time to take need to be under the guidance of a doctor.