AGA Clinical Practice Update on Management of Iron Deficiency Anemia

Iron deficiency anemia (IDA) is a prevalent nutritional deficiency globally, impacting a wide range of patients, including those with gastrointestinal disorders. The AGA has provided updated best practice advice for managing IDA, emphasizing both oral and intravenous (IV) iron supplementation.

Oral Iron Supplementation

1. Choice of Formulation: Ferrous sulfate is preferred due to its cost-effectiveness. No single oral iron formulation shows significant advantages over others.
2. Dosing Frequency: Oral iron should be given once daily, with every-other-day dosing possibly offering better tolerance and equal absorption rates.
3. Enhancing Absorption: Adding vitamin C to oral iron can improve absorption, but tea and coffee should be avoided within an hour of taking iron as they inhibit absorption.

Intravenous Iron Supplementation

1. Indications for Use: IV iron is recommended if the patient cannot tolerate oral iron, or if oral iron is ineffective. Conditions such as bariatric surgery, active inflammatory bowel disease (IBD), or high rates of iron loss necessitate IV iron.
2. Preferred Formulations: IV iron formulations that require 1-2 infusions are preferred over those needing multiple infusions. All formulations have similar risks, with true anaphylaxis being very rare.
3. Specific Considerations: IV iron is particularly indicated for patients with celiac disease not responding to a gluten-free diet and those with conditions like small-bowel angioectasias.

Managing IDA in Specific Conditions

1. Inflammatory Bowel Disease: IV iron is often superior to oral iron, especially during active inflammation. Oral iron can be considered in mild cases or when the disease is inactive.
2. Portal Hypertensive Gastropathy: Initial treatment should involve oral iron. IV iron is used in cases of ongoing bleeding unresponsive to oral therapy.
3. Gastric Antral Vascular Ectasia: Endoscopic therapy should be considered for patients not responding to iron replacement.

Conclusion
Effective management of IDA involves both replenishing iron stores and addressing underlying causes of iron deficiency. While oral iron is the first-line treatment, IV iron is a safe and effective alternative for specific patient groups. Multidisciplinary approaches, including gastroenterologists and hematologists, are essential for managing complex cases.

For more details, refer to the full article: DOI: 10.1016/j.cgh.2024.03.046.