Treatment of Iron Deficiency Anemia with Low Ferritin and Iron Levels

Diagnosis Confirmation

A ferritin level of less than 15 ng/mL confirms iron deficiency in a patient with anemia, as seen in a patient with a ferritin level of 8 ng/mL 1, 3
Transferrin saturation of 21% is borderline, but combined with low ferritin, strongly supports iron deficiency in patients with anemia 4
Depleted iron stores, as indicated by low ferritin and transferrin saturation, require supplementation to correct anemia and replenish iron stores 5

The American Gastroenterological Association recommends ferrous sulfate 200 mg three times daily as the first-line treatment for iron deficiency anemia due to its effectiveness, simplicity, and low cost 1, 5
Alternative oral preparations, such as ferrous gluconate and ferrous fumarate, are equally effective in treating iron deficiency anemia 5
Liquid preparations may be better tolerated than tablets if gastrointestinal side effects occur in patients taking oral iron supplements 5
Adding ascorbic acid (vitamin C) to oral iron supplements may enhance iron absorption in patients with poor response to treatment 5, 6

Continue iron therapy for three months after correction of anemia to adequately replenish iron stores in patients with iron deficiency anemia 1, 3

Parenteral iron should be reserved for patients who are intolerant to at least two oral iron preparations 5
Parenteral iron may be considered for patients who are non-compliant with oral therapy 5

Hemoglobin concentration should rise by approximately 2 g/dL after 3-4 weeks of therapy in patients with iron deficiency anemia 5
Failure to respond to treatment suggests poor compliance, continued blood loss, or malabsorption in patients with iron deficiency anemia 5
Once normal, monitor hemoglobin and red cell indices every three months for one year, then after another year in patients with iron deficiency anemia 3
Additional oral iron should be given if hemoglobin or MCV falls below normal in patients with iron deficiency anemia 3
Consider ferritin estimation in doubtful cases of iron deficiency anemia 3

Heavy menstrual bleeding is a common cause of iron deficiency anemia in premenopausal women, affecting 5-10% of menstruating women 5, 7

Do not continue daily iron supplementation in the presence of normal or high ferritin values, as this is potentially harmful, although the exact citation is not provided
Do not overlook the need to treat for a full three months after anemia correction to replenish stores in patients with iron deficiency anemia 1
The goal of treatment is not just to correct anemia but to fully replenish iron stores to prevent recurrence in patients with iron deficiency anemia 1, 3