Iron supplements for the treatment of iron deficiency anemia in pregnant women are divided into two types: inorganic iron and organic iron, commonly used ferrous sulfate, iron dextrose, ferrous succinate, etc., of which iron dextrose and ferrous succinate are more easily absorbed. 1. Inorganic iron: ferrous sulfate has the most applications, but compared to organic iron, it is poorly absorbed and has more gastrointestinal reactions. 2. Organic iron: including ferrous gluconate, ferrous fumarate, iron dextrose anhydride, ferrous succinate, polysaccharide iron complex. Adverse reactions of iron supplements are mostly manifested in gastrointestinal symptoms, such as nausea, heartburn, gastrointestinal cramps, diarrhea, etc. They can be taken during or after meals, starting from the smallest dose to reduce adverse reactions and improve the tolerance of treatment. During treatment, you should also eat more fish, meat, vitamin C, etc., to enhance the absorption of iron, and consume less cereals, dairy, tea, they will inhibit the absorption of iron. Specific drug use needs to be under the guidance of a physician.