Iron Deficiency Anemia Treatment

Introduction to Iron Supplementation

The American Gastroenterological Association recommends iron sulfate as the first-line treatment for iron deficiency anemia due to its proven efficacy, low cost, and wide availability 1

Iron sulfate is preferred as the least expensive iron formulation, with no oral formulation having advantages over others in terms of efficacy 1
The European Society for Clinical Nutrition and Metabolism suggests that oral iron treatment should be started to correct anemia and replenish body stores in all patients with iron deficiency 2, 3
The recommended dose is traditionally 200 mg of iron sulfate two or three times a day, although lower doses may be equally effective and better tolerated 4, 5

The American College of Gastroenterology recommends administering oral iron once a day at most, as alternate-day dosing may be better tolerated with similar or equal absorption rates 1
Adding vitamin C (250-500 mg twice a day) along with the iron preparation may improve absorption 1, 3
Treatment should continue for three months after anemia correction to replenish iron stores 3, 4

Intravenous iron should be considered in patients who do not tolerate oral iron 1, 4, when ferritin levels do not improve with an oral iron trial 1, or in patients with conditions where oral iron absorption is unlikely 1, 4
The European Society for Parenteral and Enteral Nutrition recommends intravenous iron for patients with clinically active inflammatory bowel disease 6 or those who have undergone bariatric procedures 1

Once normalized, hemoglobin concentration and red cell indices should be monitored every three months for a year and then after another year 3, 7
Additional oral iron should be administered if hemoglobin or mean corpuscular volume (MCV) falls below normal 7
Hemoglobin concentration should increase by approximately 2 g/dl after 3-4 weeks of treatment 3

In patients with inflammatory conditions, iron deficiency diagnosis can be complicated, as ferritin levels may be elevated despite deficiency 8
Premenopausal women represent an important population with a high prevalence of iron deficiency anemia (5-10%) 3
Common side effects of oral iron include constipation (12%), diarrhea (8%), and nausea (11%) 8