Vitamin C injection can be used for the treatment of scurvy, or some other acute and chronic blood system diseases, as well as the prevention and treatment of thrombocytopenia, anemia and other diseases, and can usually be administered by intramuscular injection or intravenous injection. Adults can use 150-250mg once, 2-3 times a day; children’s dosage is 100-200mg a day, divided into 2-3 times to give the drug, it should be noted that if it is used to treat Creutzfeldt-Jakob disease, the dosage of the drug can be larger, according to the different conditions of each person to decide the dosage of the drug. In the intravenous injection of vitamin C injection should be slowly pushed, because rapid intravenous injection may cause dizziness, fainting adverse reactions, in addition to the long-term use of large amounts of vitamin C, there may be an increased risk of urinary tract stones.