Iron Isomaltoside

Iron Isomaltoside is an iron replacement product. It is used to treat a type of anemia where you have too few red blood cells because you have too little iron in your body (iron-deficiency anaemia). Iron is needed to produce the red blood cells that carry oxygen around your body.

Iron Isomaltoside is given as an injection by your doctor or nurse. You will be watched carefully to make sure you do not have an allergic reaction. Your doctor will decide how many doses you need depending on the cause of your anemia, it may help to eat a well-balanced diet that has enough iron, vitamins, and minerals. Good sources of iron include meat, eggs, raisins, broccoli, and lentils.

The most common side effects include vomiting, nausea, dark-colored stools, constipation, and diarrhea. Most of these usually go away within a short time. If you are bothered by them or they go on for longer, talk to your doctor or nurse.

You should not have this medicine if your anemia is not caused by a lack of iron. Before taking it, tell your doctor if you have rheumatoid arthritis, asthma or other allergies, high blood pressure, or liver problems. This may affect your treatment. It is not known whether this medicine is safe for use if you are pregnant or breastfeeding so please take advice from your doctor. You will have tests to check your blood cells and iron levels, monitor your progress and check for side effects. It may be advisable to limit alcohol during treatment.

• Iron deficiency anemia

Iron deficiency anemia
Anemia 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 anemia. Iron Isomaltoside is an iron replacement product. It can boost your levels of red blood cells and reduce the symptoms of anemia such as tiredness and weakness. This medicine is given as an injection by a doctor or nurse. You should not have this medicine if your anemia is not caused by a lack of iron.

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them

Common side effects of Fesomalt

• Vomiting
• Dark colored stool
• Nausea
• Constipation
• Diarrhea

Your doctor or nurse will guide you how to use this medicine.

Iron Isomaltoside is an anti-anemic medication. It replenishes the iron stores in your body. Iron is vital for the formation of new red blood cells and hemoglobin, a substance that gives these cells the ability to transport oxygen.

• Iron Isomaltoside is given to treat anemia due to iron deficiency.
• Let your doctor know if you are taking any antibiotics.
• Inform your doctor if you have any gastrointestinal disorders like peptic ulcer or ulcerative colitis.
• Iron supplements can make your stools look darker in color. This is completely harmless.
• Iron Isomaltoside can cause constipation, try to eat a well-balanced diet and drink several glasses of water each day.

Kalra PA. Introducing iron isomaltoside 1000 (Monofer®)—development rationale and clinical experience. NDT Plus. 2011;4(Suppl 1):i10-i13. [Accessed 07 Apr. 2019] (online) Available from:

Iron (III) isomaltoside 1000. Reading, Berkshire: Pharmacosmos UK Limited; 2009 [revised 19 May 2019]. [Accessed 07 Apr. 2019] (online) Available from: