Pregnant women can use the drug if there is vitamin C drug indications, but need to pay attention to avoid contraindications, and need to pay attention to control the dose of the drug. Vitamin C can be used to prevent scurvy, but also used to assist in the treatment of various acute and chronic infectious diseases, purpura and other diseases. If the above indications for the use of the drug exist during pregnancy, the drug can be used, daily use is not recommended, and the use of large quantities of the drug has the risk of inducing neonatal scurvy. In the use of the drug, if there is a rash, nausea and other adverse reactions need to stop the drug in time; the end of the treatment to stop the drug need to slowly reduce the dose, the sudden reduction of the dose may lead to scurvy; drug allergies prohibit the use of the drug. Gout, urinary stones, sickle cell anemia, diabetes mellitus and other groups need to be used with caution. Vitamin C needs to be used under the guidance of a clinician, unauthorized use is prohibited.