Pregnant women who are taking iron tablets for sugar control and keep vomiting may consider injectable iron supplementation. Gastrointestinal adverse effects such as nausea and vomiting may occur after taking iron tablets orally, and if the adverse effects are more severe and cannot be tolerated, then injectable iron supplementation should be considered. Intravenous iron supplements include iron sucrose, low molecular iron dextrose, ferrous gluconate, and iron carboxymaltose. The use of specific drugs needs to be under the guidance of a doctor. Pregnant women with iron deficiency anemia need to increase the intake of iron-containing foods in daily life, such as lean meat and animal blood. At the same time, pregnant women who need to control sugar should avoid eating high-sugar foods, such as cakes, milk tea and so on. Pregnant women who are taking iron tablets and keep throwing up and are controlling sugar should go to the hospital and ask the doctor to make a judgment and formulate a treatment plan.