What is the recommended dose of iron syrup (ferrous sulfate) for a 1-year-old child?

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Last updated: November 18, 2025View editorial policy

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Recommended Dose of Iron Syrup for a 1-Year-Old Child

For treatment of presumptive iron-deficiency anemia in a 1-year-old child, prescribe 3 mg/kg per day of elemental iron (as ferrous sulfate drops) administered between meals. 1

Treatment Dosing

  • The standard therapeutic dose is 3 mg/kg per day of elemental iron, given as iron drops (ferrous sulfate) between meals to maximize absorption 1

  • This dose should be continued for the initial 4-week treatment period, after which hemoglobin should be rechecked 1

  • If hemoglobin increases by ≥1 g/dL (or hematocrit by ≥3%) after 4 weeks, this confirms iron-deficiency anemia and treatment should continue for 2 additional months 1

Higher Dose Considerations

  • Some evidence supports using 5-6 mg/kg per day of elemental iron for treatment of established iron-deficiency anemia, which has been shown effective in clinical studies 2, 3

  • A dose of 6 mg/kg per day may be needed to correct preexisting iron deficiency or when more aggressive repletion is required 4

  • The optimal therapeutic response can be achieved with dosages ranging from 3 to 6 mg/kg of elemental iron per day 2

Administration Guidelines

  • Administer iron between meals (not with meals) to optimize absorption, as food can decrease iron bioavailability 1

  • Ferrous sulfate is the preferred formulation as it demonstrates better clinical response and fewer adverse effects compared to iron polymaltose complex 5

  • Divide the total daily dose into 2-3 administrations throughout the day for better tolerance 5

Important Caveats

  • Always provide dietary counseling concurrently to address the underlying problem of inadequate iron intake 1

  • Common side effects include mild gastrointestinal symptoms (nausea, vomiting, diarrhea), which should not necessarily prompt discontinuation 1

  • If the anemia does not respond after 4 weeks despite compliance and absence of acute illness, further laboratory evaluation is needed (MCV, RDW, serum ferritin) 1

  • Avoid excessive dosing: systemic iron toxicity with hepatocellular damage has been reported with excessive iron administration in pediatric patients 1, 6

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Research

Iron Deficiency Anemia: An Updated Review.

Current pediatric reviews, 2024

Research

Neonatal iron nutrition.

Seminars in neonatology : SN, 2001

Guideline

Iron Sucrose Administration in Pediatric Patients

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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