Vitamin C tablets, according to the size of 100mg per tablet, can be taken 1 tablet a day for vitamin C supplementation and 3 to 6 tablets a day for the treatment of vitamin C deficiency. For the treatment of pediatric vitamin C deficiency you can take 1~3 tablets a day. If you need to use the drug, you need to use it properly under the guidance of your doctor. Vitamin C tablets are used for patients with vitamin C insufficiency or vitamin C deficiency. It can also be used to prevent scurvy or various acute and chronic infectious diseases and other auxiliary treatment. For vitamin C supplementation: 100mg a day for adults.For the treatment of vitamin C deficiency: 100~200mg once a day for adults, 3 times a day. Children: 100~300mg a day. Vitamin C tablets should not be taken for a long time, long-term application of large amounts of vitamin C can cause urate, cysteine salt or oxalate stones. Overdose can cause diarrhea, red and bright skin, headache, frequent urination, nausea and vomiting, stomach cramps and other symptoms. If you need to use the drug, you need to use it properly under the guidance of a doctor.