Compiron 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. Take Compiron as a whole – do not break, chew or crush them. You will be watched carefully to make sure you do not have an allergic reaction. Your doctor will decide how much dose you need depending on the cause of your anaemia, 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 diarrhea, constipation, dark colored stools, and injection site reactions (pain, swelling, redness). 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.