Contraindications to the use of iron dextrose tablets include gastric and duodenal ulcers, ulcerative colitis and other diseases. Iron dextrose tablets are commonly used for iron deficiency anemia caused by chronic blood loss of clear etiology, malnutrition, pregnancy, and child development. Gastrointestinal adverse reactions, such as nausea, vomiting, epigastric pain, etc., may occur with the use of this drug, which reduces intestinal peristalsis and causes constipation, which may lead to black stools. Note that it is forbidden for those who are allergic to iron, should not be taken with strong tea, and should be used with caution in patients with alcoholism, hepatitis, acute infections, intestinal inflammation and pancreatitis. If you need to use iron dextrose tablets, you should strictly follow the doctor’s instructions, do not blindly self-medication, in order to avoid adverse reactions.