Iron Deficiency Anemia Treatment Guidelines

Initial Treatment Approach

The British Society of Gastroenterology recommends starting with ferrous sulfate 200 mg three times daily as the most cost-effective and evidence-based option for treating iron deficiency anemia caused by heavy menstrual bleeding 1, 2, 3, 4
Alternative oral formulations, such as ferrous gluconate and ferrous fumarate, are equally effective if ferrous sulfate is not tolerated 1, 2, 3
Adding ascorbic acid (vitamin C) 500 mg can enhance iron absorption if response is poor 1, 2, 5

Continue oral iron for three months after hemoglobin normalizes to fully replenish body iron stores 1, 2, 6, 7
Expect hemoglobin to rise by 2 g/dL after 3-4 weeks of treatment 1, 2, 3, 4, 8
Monitor hemoglobin and red cell indices every three months for one year, then annually 1, 2, 6, 7

Reserve intravenous iron for specific clinical scenarios, such as intolerance to at least two different oral iron preparations or non-compliance with oral therapy 1, 2, 3, 4, 8
Chronic inflammatory conditions affecting iron absorption may also require intravenous iron 9

Concurrent treatment of heavy menstrual bleeding itself is critical to prevent ongoing iron loss 1, 2, 3
Heavy menstrual bleeding affects 5-10% of menstruating women and is the primary cause of iron deficiency in this population 1, 2, 3, 10, 7

Poor compliance is the most common cause of poor response to oral iron 3
Continued blood loss exceeding replacement can also lead to poor response to oral iron 9
Premature discontinuation of iron supplementation can lead to rapid recurrence of anemia 1, 2, 6, 7
Patients over 45 years require gastrointestinal evaluation even with heavy menstrual bleeding, as the incidence of GI pathology increases with age 1, 2, 3, 4, 8