Iron Deficiency Treatment Guidelines

Introduction to Iron Deficiency Treatment

The American College of Physicians recommends starting with 50-100 mg of elemental iron taken once daily in the morning on an empty stomach for most adults with iron deficiency 1

The standard first-line approach is to use ferrous sulfate 200 mg tablet, containing 65 mg elemental iron, taken once daily, as it is the most cost-effective option 1
Taking iron as a single morning dose on an empty stomach maximizes absorption 1, 2

For mild to moderate anemia, 50-100 mg elemental iron once daily is recommended, minimizing side effects while providing adequate iron for repletion 1
For severe or symptomatic anemia, 100-120 mg elemental iron once daily accelerates hemoglobin recovery when rapid correction is needed 2

In patients with inflammatory bowel disease, the maximum dose should be 100 mg elemental iron per day, only when the disease is clinically inactive, to avoid exacerbating inflammation 4
Adolescents should take 60-120 mg elemental iron once daily in the morning, using the higher end for severe or symptomatic anemia 2
Patients with chronic kidney disease require 200 mg elemental iron per day, divided into 2-3 doses, due to impaired iron utilization 3

Taking iron with 250-500 mg vitamin C enhances absorption by forming an iron chelate 1
Avoiding tea, coffee, or calcium-containing foods/medications within 2 hours of iron intake prevents inhibition of absorption 1, 3

Expect hemoglobin to increase by at least 10 g/L (1 g/dL) within 2 weeks, and failure to achieve this rise predicts treatment failure 1
Treatment should continue for approximately 3 months after hemoglobin normalizes to adequately replenish iron stores 1, 2

Prescribing multiple daily doses should be avoided, as it results in reduced absorption due to hepcidin elevation 1
Modified-release preparations are less suitable and deliver iron past the duodenum where absorption is optimal 1
Multivitamin preparations alone are insufficient for treating iron deficiency anemia, as they typically contain only 14-30 mg elemental iron 1

Intravenous iron therapy should be considered when oral iron is not tolerated, or there is no improvement in ferritin levels after 4 weeks of adequate oral therapy 1
Conditions impairing oral iron absorption, such as inflammatory bowel disease or chronic kidney disease, also warrant consideration of intravenous iron 1