Vitamin C tablets have the effect and function of preventing scurvy, treating acute and chronic infectious diseases and purpura. In addition, usually avoid overdose of vitamin C tablets, allergic people prohibit the drug. Vitamin C tablets have the function and effect of preventing scurvy, and can also be used in the adjuvant treatment of various acute and chronic infectious diseases such as viral hepatitis, avian influenza, polio and other acute and chronic infectious diseases, and can also be used in the adjuvant treatment of purpura. Vitamin C tablets should not be overdosed, overdose of vitamin C tablets may cause adverse reactions such as scurvy, urate, nausea and frequent urination. In addition, this drug is contraindicated for people who are allergic to vitamin C to prevent allergic symptoms such as difficulty in breathing, generalized red rash, itchy skin and so on. Vitamin C tablets have the effect of preventing scurvy, it is recommended that patients consult a doctor before using the drug, follow the doctor’s instructions to use the drug, should not be long-term and overdose. If the patient after using the drug appeared breathing difficulties, generalized red rash and other symptoms, should be immediately discontinued, and consult a doctor in a timely manner.