The effects of ferrous sulfate folic acid tablets are as follows: First, it can improve the immunity of human body, because ferrous sulfate folic acid tablets can supplement the iron and folic acid of human body, which can indirectly trigger the enhanced function of immune system and promote the proliferation of bone marrow to differentiate more immune cells, such as T lymphocytes and B lymphocytes, thus enhancing the immunity of human body. Secondly, it can promote the proliferation of red blood cells and increase the number and type of red blood cells in the blood, which can effectively prevent iron deficiency anemia and erythrocytic anemia, because iron is one of the raw materials necessary for the production of red blood cells, and folic acid is also necessary for the proliferation and division of cells. Thirdly, it can treat peptic ulcer because ferrous sulfate folic acid tablets can interfere with the secretion of gastric acid and the synthesis of pepsinogen after entering the gastrointestinal tract, thus treating peptic ulcer.