Oral Iron Therapy

Only ferrous salts should be used because of most efficient absorption. Ferrous sulfate, ferrous gluconate, ferrous fumarate are the most commonly used oral iron preparations. About 25% of oral iron given as ferrous salt can be absorbed; therefore 200-400mg elemental irons should be given daily to correct iron deficiency most rapidly. Treatment should be continued for 3-6 months to replenish iron stores.

Side effects: Oral iron therapy can cause nausea, vomiting, epigastric discomfort, abdominal cramps, constipation and diarrhea.