Iron dextran tablets are commonly used in clinic to treat iron deficiency anemia. Usually, they are combined with vitamin C to promote the absorption of iron in patients with iron deficiency anemia. Iron dextran tablets are oral iron preparations. Some patients may have mild gastrointestinal reactions, such as nausea, vomiting, diarrhea, etc., which can be taken after meals, or from a small dose, gradually increasing the dose. In addition, stool may turn black during taking iron dextran tablets, which is due to the influence of drugs. Pay attention to observation.