Herfem S 50mg Injection is an iron replacement medicine. 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 anemia). Iron is needed to produce the red blood cells that carry oxygen around your body. Herfem S 50mg Injection is given by slow infusion (drip) into a vein by your doctor or nurse. Your doctor will decide the dose you need and how many injections you should have to improve your anemia. It will also help to eat a well-balanced diet that has enough iron. Good sources of iron include pulses (dal), green leafy vegetables like spinach, beans, eggs, dry fruits, and non-vegetarian foods. The most common side effects include altered taste, hypertension (high blood pressure), nausea, and injection site reactions (such as pain, redness, and swelling). Some people may develop a temporary fall in blood pressure (hypotension) if this medicine is given too rapidly. Your doctor will also monitor you for signs of an allergic reaction such as breathlessness, dizziness, feeling uneasy, hives, swelling of face, tongue, and throat, etc. while this medicine is being given. 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.