Comparative Pharmacology
Head-to-head clinical analysis: FERUMOXYTOL versus IRON DEXTRAN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: FERUMOXYTOL versus IRON DEXTRAN.
FERUMOXYTOL vs IRON DEXTRAN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Ferumoxytol is an ultrasmall superparamagnetic iron oxide nanoparticle that provides a source of iron for erythropoiesis. It is phagocytosed by macrophages of the reticuloendothelial system, and iron is released intracellularly to bind to transferrin and ferritin, replenishing iron stores.
Iron dextran is a colloidal solution of ferric oxyhydroxide complexed with dextran, which provides a source of iron for hemoglobin synthesis. After intramuscular or intravenous administration, the iron-dextran complex is taken up by the reticuloendothelial system, where iron is released and bound to transferrin for erythropoiesis.
510 mg intravenously once, followed by 510 mg intravenously 3 to 8 days later for a total cumulative dose of 1020 mg. Administer as a slow IV injection at 1 mL/min (30 mg/min) undiluted or diluted in 50-200 mL normal saline.
IM or IV: Calculate total iron deficit using formula: Body weight (kg) × (target Hb - actual Hb) × 0.24 + 500 mg (for iron stores). Administer as single IV infusion or daily IM doses up to 2 mL (100 mg) per day. IV infusion: Dilute in 0.9% NaCl and infuse over 1-6 hours; test dose of 25 mg recommended.
None Documented
None Documented
Terminal elimination half-life is approximately 14-21 hours in healthy adults; prolonged in patients with iron deficiency anemia (up to 30 hours) due to increased iron utilization.
The terminal elimination half-life is approximately 5-6 hours for the iron-dextran complex, but the iron released from the complex has a half-life of 2-3 days due to incorporation into erythrocytes and storage pools.
Ferumoxytol is eliminated primarily through the reticuloendothelial system, with the iron moiety incorporated into hemoglobin or stored as ferritin/hemosiderin. Minimal renal or biliary excretion of intact drug; <1% excreted unchanged in urine.
Iron dextran is primarily excreted via the reticuloendothelial system; iron is incorporated into hemoglobin and stored as ferritin/ hemosiderin. Renal excretion of intact complexes is minimal (<1%). Fecal excretion accounts for less than 1% of the dose.
Category C
Category C
Iron Replacement
Iron Replacement