Comparative Pharmacology
Head-to-head clinical analysis: FERROUS FUMARATE versus IRON DEXTRAN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: FERROUS FUMARATE versus IRON DEXTRAN.
FERROUS FUMARATE vs IRON DEXTRAN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Iron is an essential component of hemoglobin, myoglobin, and various enzymes; ferrous fumarate provides elemental iron for erythropoiesis and oxygen transport.
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.
Oral: 200 mg (equivalent to 65 mg elemental iron) three times daily. Adults: 325 mg (106 mg elemental iron) one to three times daily.
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
5-7 hours for iron in serum after absorption; terminal half-life of storage iron (ferritin) is approximately 6 days; clinical context: follows first-order kinetics with iron recycling.
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.
Primarily fecal (about 90%) as unabsorbed iron; minor renal excretion (<1%) via sloughed intestinal cells and bile; negligible urinary elimination.
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