Oral iron supplementation: new formulations, old questions

Area of Science:

• Hematology
• Gastroenterology
• Pharmacology

Background:

• Iron-deficiency anemia and pre-anemic iron deficiency are highly prevalent global health issues.
• Oral iron supplementation, particularly ferrous sulfate, is the primary treatment, with various ferrous salts and ferric complexes also utilized.
• Novel formulations like ferric maltol and sucrosomial® iron have emerged to improve iron delivery and potentially reduce side effects.

Purpose of the Study:

• To critically review the literature on the efficacy and tolerability of available oral iron supplements.
• To summarize recent data regarding optimal dosage and frequency for oral iron therapy.
• To compare oral iron supplementation with intravenous iron therapy in managing iron deficiency.

Main Methods:

• Systematic literature review of clinical trials and observational studies.
• Analysis of data on efficacy (hemoglobin levels, iron stores) and tolerability (gastrointestinal adverse events).
• Evaluation of studies investigating novel iron formulations and intravenous iron preparations.

Main Results:

• Oral iron supplementation is generally effective but frequently associated with gastrointestinal side effects, impacting patient compliance.
• Intravenous iron therapy provides a rapid and effective alternative, bypassing gastrointestinal issues, especially when oral iron is contraindicated or ineffective.
• Newer oral iron formulations aim to enhance absorption and reduce adverse effects, though long-term comparative data is still evolving.

Conclusions:

• The choice of iron supplementation should balance efficacy, tolerability, and patient-specific factors.
• Intravenous iron is a crucial option for severe cases or when oral iron is poorly tolerated.
• Further research is needed to fully establish the long-term benefits and optimal use of novel oral iron formulations.