Theofer XT is an injectable iron supplement formulated for the treatment of iron deficiency. Its therapeutic purpose is to replenish depleted iron stores and support hemoglobin synthesis in patients with documented iron deficiency. The medication contains ferric carboxymaltose, a dextran-stabilized iron complex that delivers iron directly to the circulation. Upon administration the complex dissociates slowly, releasing iron ions that bind to transferrin and are transported to erythroid precursors. The released iron serves as a cofactor for hemoglobin production, thereby increasing red blood cell volume and oxygen-carrying capacity. Pharmacodynamically the drug exhibits a rapid rise in serum iron and sustained ferritin elevation without the need for multiple dosing. The overall effect is correction of iron deficiency anemia while minimizing oxidative stress on tissues.

Theofer XT contains ferric maltol, a form of iron that is absorbed in the gastrointestinal tract. Once absorbed, the iron ions are transported to bone marrow where they are incorporated into hemoglobin molecules. This supplementation raises the body's iron stores and supports the production of red blood cells. The increased hemoglobin improves oxygen transport throughout the body, reducing fatigue and shortness of breath. Iron also acts as a cofactor for many enzymatic reactions that maintain cellular metabolism. Together these actions make Theofer XT an effective therapy for iron deficiency conditions.

Theofer XT may cause mild gastrointestinal discomfort in some individuals. Occasional nausea has been reported after taking the supplement on an empty stomach. Some users experience constipation that usually resolves with adequate fluid intake. Headache or dizziness can occur, particularly during the first few days of use. Skin reactions such as rash or itching have been documented in rare cases. Changes in taste perception have been noted by a small number of participants. The frequency of these effects is generally low and tends to diminish with continued use.

Theofer XT may cause mild stomach discomfort after ingestion. Some users report occasional nausea. Headaches have been noted in a small number of cases. Dizziness can occur, especially when standing up quickly. Constipation is a possible gastrointestinal effect. Fatigue may be experienced by certain individuals. A metallic taste sometimes appears after taking the medication. Skin rashes are rare but have been documented.