Iron Sucrose Injection is often used to treat iron-deficiency anemia in patients with chronic kidney disease, which affects the kidneys and causes them to stop functioning over time. Iron sucrose injection is a form of drug known as an iron substitute product. It functions by replenishing iron reserves, allowing the body to produce more red blood cells. Treatment with Iron Sucrose Injection is advantageous because of its potential to quickly raise hemoglobin, ferritin and transferrin saturation levels.