The Importance of Iron

Iron regulation is critical to red blood cell production

Absorption of iron is regulated by 3 primary mechanisms: a dietary regulator that responds to iron consumed in the diet, a storage regulator that responds to the total amount of iron in the body, and an erythropoietic regulator that responds to the requirements of red blood cell (RBC) production.²⁹

• Two-thirds of the body’s iron is incorporated into hemoglobin (Hgb) for use in mature and developing RBCs²⁹
• Most of the remaining iron is stored in reticuloendothelial cells of the liver, spleen, and bone marrow²⁹
• Transferrin in blood plasma transports iron between storage pools and erythroid precursors, with minimal daily losses replaced with absorption of iron from the diet^22,29,30

Iron is essential to erythropoiesis^31,32

Adapted from Bron et al. Semin Oncol. 2001.^31,32

Abnormalities in the regulation and metabolism of iron can result in iron deficiency anemia.

Important Safety Information

Indication and contraindications

Feraheme is indicated for the treatment of iron deficiency anemia in adult patients with chronic kidney disease. Feraheme is contraindicated in patients with evidence of iron overload, known hypersensitivity to Feraheme or any of its components, and patients with anemia not caused by iron deficiency.

Warnings and precautions

In clinical studies, serious hypersensitivity reactions were reported in 0.2% (3/1,726) of subjects receiving Feraheme. Other adverse reactions potentially associated with hypersensitivity (e.g., pruritus, rash, urticaria or wheezing) were reported in 3.7% (63/1,726) of subjects. Patients should be observed for signs and symptoms of hypersensitivity for at least 30 minutes following Feraheme injection and the drug should only be administered when personnel and therapies are readily available for the treatment of hypersensitivity reactions. 1.9% (33/1,726) of Feraheme-treated subjects experienced hypotension. Please monitor for signs and symptoms of hypotension following each Feraheme injection. Excessive therapy with parenteral iron can lead to excess storage of iron with the possibility of iatrogenic hemosiderosis. Patients should be regularly monitored for hematologic response during parenteral iron therapy, noting that lab assays may overestimate serum iron and transferrin bound iron values in the 24 hours following administration of Feraheme. As a superparamagnetic iron oxide, Feraheme may transiently affect magnetic resonance diagnostic imaging studies for up to 3 months following the last Feraheme dose. Feraheme will not affect X-ray, CT, PET, SPECT, ultrasound, or nuclear imaging.

Adverse reactions

In clinical trials, the most commonly occurring adverse reactions in Feraheme treated patients versus oral iron treated patients reported in ≥2% of chronic kidney disease patients were diarrhea (4.0% vs. 8.2%), nausea (3.1% vs. 7.5%), dizziness (2.6% vs. 1.8%), hypotension (2.5% vs. 0.4%), constipation (2.1% vs. 5.7%) and peripheral edema (2.0% vs. 3.2%). In clinical trials, adverse reactions leading to treatment discontinuation and occurring in 2 or more Feraheme-treated patients included hypotension, infusion site swelling, increased serum ferritin level, chest pain, diarrhea, dizziness, ecchymosis, pruritus, chronic renal failure, and urticaria.

Please see full Prescribing Information for Feraheme.