FCM stands for Ferric Carboxymaltose, which is a high-dose iron replacement therapy. It is used to treat “Iron Deficiency Anemia” in patients where oral iron tablets are not effective, cannot be tolerated, or where a rapid increase in iron levels is medically necessary (such as before a major surgery). Unlike older iron injections that required multiple small doses, FCM allows for a large amount of iron to be delivered safely in a single, short IV infusion.

Iron is essential for making hemoglobin, the part of the red blood cell that carries oxygen throughout the body. Patients with low iron often feel extremely fatigued, dizzy, and pale. An FCM infusion can significantly improve these symptoms within a week or two. The most common side effect is a temporary “metallic taste” in the mouth or a mild headache. Because of the rare risk of a severe allergic reaction, this injection is always given in a clinical setting where the patient can be observed.