Treatment Approach for Iron Deficiency Anemia

Initial Treatment Strategy

Oral iron supplementation with ferrous sulfate is the first-line treatment for iron deficiency anemia, while intravenous iron should be used for patients who cannot tolerate oral iron, have inadequate response, or have conditions affecting iron absorption 1, 2, 3
Ferrous sulfate is the preferred oral iron formulation due to its low cost and effectiveness 3
Administer oral iron once daily rather than multiple times per day to improve tolerance 3
Add vitamin C to oral iron supplementation to enhance absorption 3
The hemoglobin concentration should rise by approximately 2 g/dL after 3-4 weeks of treatment 4

Determine whether iron deficiency is due to inadequate intake/absorption or blood loss in patients with inflammatory bowel disease 1
Treat active inflammation to enhance iron absorption and reduce iron depletion in patients with inflammatory bowel disease 1
Use intravenous iron in patients with active inflammation and compromised absorption in inflammatory bowel disease 5
Begin with oral iron supplements to replenish iron stores in patients with portal hypertensive gastropathy 1
Switch to intravenous iron for patients with ongoing bleeding who don't respond to oral therapy in portal hypertensive gastropathy 7
Hemoglobin levels <10 g/dL in inflammatory bowel disease require prompt treatment 6

Prefer IV iron formulations that can replace iron deficits with 1-2 infusions 8
Be aware that true anaphylaxis with IV iron is rare; most reactions are infusion-related 2

Failing to diagnose iron deficiency in patients with inflammatory conditions who may have ferritin levels >45 mg/dL (usually <100 mg/dL) 1
Continuing oral iron therapy despite poor response or intolerance 3
Not addressing the underlying cause of iron deficiency while treating the anemia 1
Overlooking the need for multidisciplinary management in complex cases 1