Iron Deficiency Anemia Treatment in Adolescents

Initial Treatment and Dosing

The Centers for Disease Control and Prevention recommends adolescent boys (ages 12-18) receive 120 mg of elemental iron daily, while adolescent girls should receive 60-120 mg of elemental iron daily, combined with dietary counseling to optimize iron intake 1, 2
Adolescent boys (12-18 years) should be prescribed two 60-mg iron tablets daily (120 mg total elemental iron) 1
Adolescent girls (12-18 years) should be prescribed 60-120 mg of elemental iron daily 2, 3

Iron should be administered on an empty stomach or between meals to maximize absorption, but if gastrointestinal side effects occur, it can be taken with meals despite reduced absorption 3
Vitamin C-rich foods or supplements should be recommended with iron to enhance absorption 3
Heme iron sources (meat, poultry, fish) have superior bioavailability compared to plant-based non-heme iron, and plant-based iron sources should be paired with vitamin C-rich foods 3

Hemoglobin should be rechecked after 4 weeks of treatment, and if it rises appropriately, iron supplementation should be continued for an additional 2-3 months to replenish iron stores 1, 2, 3
The expected response to treatment is an increase in hemoglobin by ≥1 g/dL 4
If anemia does not respond after 4 weeks, additional laboratory tests such as mean corpuscular volume (MCV), red blood cell distribution width (RDW), and serum ferritin should be obtained 1, 2, 3, 4

Iron supplementation should be continued for 2-3 months after hemoglobin normalizes to replenish iron stores 1, 2, 3
The total treatment course is typically 3 months minimum for confirmed iron deficiency anemia 4

Adolescent boys should not be screened routinely unless they have a history of iron deficiency anemia, special healthcare needs, or documented low iron intake 1
It should not be assumed that all microcytic anemia is iron deficiency, and thalassemia trait should be considered in at-risk populations 2
Iron therapy should not be discontinued as soon as hemoglobin normalizes, as stores must be replenished 1, 2