Folic acid tablets are recommended for adults 5-10mg/times, 15-30mg/day; children 5mg/times, 3 times/day; 0.4mg/times, 1 time/day for pregnant and lactating women, according to the doctor’s instructions. Folic acid tablets are mainly used for the treatment of folic acid deficiency and the resulting megaloblastic anemia, but also to prevent congenital neural tube malformations in fetuses due to folic acid deficiency in women during pregnancy, and to prevent folic acid deficiency in lactating women. The specifications of the drug are 0.4mg and 5mg/tablet. It is generally recommended for children to take 5mg orally at one time and use it 3 times a day (or take 5-15mg orally 3 times a day); it is recommended for adults to take 5-10mg at one time, with a total amount of 15-30mg per day until the blood picture returns to normal; it is recommended for pregnant and lactating women as a prophylactic drug, 0.4mg orally at one time and use it 1 time per day, and pregnant women can use it until the end of the 3rd trimester of pregnancy. Women can be used until the end of the third trimester. The drug should be contraindicated in people who are allergic to the product. Anaphylactic reactions are rare, but in case of prolonged use of the drug, adverse reactions associated with gastrointestinal symptoms, such as fear of food, nausea, bloating, etc., may occur. The use of specific drugs should be carried out under the supervision of a physician.