The efficacy and function of folic acid tablets is to prevent and treat diseases caused by folic acid deficiency, for vitamin B12 deficiency caused by megaloblastic anemia is contraindicated folic acid alone. Folic acid tablets are vitamin drugs that work to supplement folic acid. The role of this product is to treat various causes of folic acid deficiency, such as folic acid deficiency caused by megaloblastic anemia; also used for chronic hemolytic anemia caused by folic acid deficiency, breastfeeding and preventive administration of women during pregnancy. Folic acid tablets are contraindicated for the treatment of megaloblastic anemia due to vitamin B12 deficiency when folic acid alone is not used. Adverse reactions to this product are nausea, fear of food, abdominal distension with prolonged use of the drug, and yellow coloration of liquid urine when taken in large quantities. It is important to note that folic acid should not be used alone in cases of pernicious anemia and suspected vitamin B12 deficiency. If you need to take folic acid, you need to apply under the guidance of a physician, do not take on your own to avoid adverse consequences.