Ferium Injection is an iron replacement medicine. It is used to treat a type of anemia where you have fewer amount of red blood cells due to insufficient iron in your body (iron-deficiency anemia). Iron is needed to produce the red blood cells that carry oxygen around your body.Anaemia is a condition where your body does not have enough red blood cells to carry oxygen around your body. If you do not have enough iron from the foods you eat (because of poor nutrition or poor absorption of the mineral), your body will produce fewer red blood cells and can cause anaemia. Ferium Injection is an iron replacement product. It can boost your levels of red blood cells and reduce the symptoms of anaemia such as tiredness and weakness.s.