👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Physiological Adaptation🔖 Free to read, print, and share
Also known as: low iron · iron anemia · anemia from low iron · iron deficiency · low blood iron
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Use this quick-reference guide to spot, treat, and prevent Iron-Deficiency Anemia on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
⚠️ Causes
blood loss, ↓intake, menstruation
GI bleed, pregnancy, malabsorb
🩺 Signs
pallor, fatigue, tachycardia
spoon nails, pica, glossitis
🧪 Labs
microcytic hypochromic RBC
↓ferritin, ↓Hgb, ↑TIBC
🎓 Teach
iron + vit C (↑absorption)
take empty stomach, expect dark stool
IM iron = Z-track, no massage
liquid iron via straw (stains teeth)
📚 Iron-Deficiency Anemia — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Iron-deficiency anemia is the most common anemia, caused by inadequate iron to make hemoglobin, producing small, pale red cells. Common causes are chronic blood loss (GI bleed, heavy menses), poor dietary intake, malabsorption, and pregnancy. It matters because low oxygen-carrying capacity causes fatigue and, if severe, cardiac strain.
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Key points
Understand these first
Red cells are microcytic and hypochromic (small and pale).
Classic signs include fatigue, pallor, weakness, dyspnea on exertion, and tachycardia.
Pica (craving ice, dirt, or clay) and spoon-shaped, brittle nails (koilonychia) are characteristic.
Glossitis (smooth, sore, beefy-red tongue) and cheilosis (cracked mouth corners) may occur.
In adults, a new iron-deficiency anemia is GI blood loss until proven otherwise.
Ferritin (iron stores) is low and is the earliest lab to drop.
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Nursing priorities
What to do, in order
Assess for and identify the source of blood loss, including checking stool for occult blood.
Administer prescribed oral iron with vitamin C or orange juice on an empty stomach to enhance absorption.
Give IM iron by Z-track technique to prevent staining and tissue irritation; never massage the site.
Balance activity with rest and space care to reduce oxygen demand and fatigue.
Monitor reticulocyte count, which should rise within a week of effective therapy.
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Red flags — report now
Escalate immediately
Report tachycardia, chest pain, or marked dyspnea that signals cardiac compensation from severe anemia.
Report active or worsening GI bleeding (melena, hematemesis, bright red rectal bleeding).
Hemoglobin below the transfusion threshold or rapidly falling requires escalation.
Take oral iron with vitamin C or juice and avoid taking it with milk, antacids, tea, or coffee.
Iron turns stools dark/tarry-black and may cause constipation; increase fluids and fiber.
Eat iron-rich foods such as red meat, liver, leafy greens, beans, and fortified cereals; use a straw for liquid iron to protect teeth.
❓ Iron-Deficiency Anemia: NCLEX FAQs
What are the priority nursing interventions for Iron-Deficiency Anemia?
Assess for and identify the source of blood loss, including checking stool for occult blood. Administer prescribed oral iron with vitamin C or orange juice on an empty stomach to enhance absorption. Give IM iron by Z-track technique to prevent staining and tissue irritation; never massage the site. Balance activity with rest and space care to reduce oxygen demand and fatigue.
What are the warning signs of Iron-Deficiency Anemia a nurse must report?
Report tachycardia, chest pain, or marked dyspnea that signals cardiac compensation from severe anemia. Report active or worsening GI bleeding (melena, hematemesis, bright red rectal bleeding). Hemoglobin below the transfusion threshold or rapidly falling requires escalation.
What do I need to know about Iron-Deficiency Anemia for the NCLEX?
Red cells are microcytic and hypochromic (small and pale). Classic signs include fatigue, pallor, weakness, dyspnea on exertion, and tachycardia. Pica (craving ice, dirt, or clay) and spoon-shaped, brittle nails (koilonychia) are characteristic. Glossitis (smooth, sore, beefy-red tongue) and cheilosis (cracked mouth corners) may occur.
What patient teaching is important for Iron-Deficiency Anemia?
Take oral iron with vitamin C or juice and avoid taking it with milk, antacids, tea, or coffee. Iron turns stools dark/tarry-black and may cause constipation; increase fluids and fiber. Eat iron-rich foods such as red meat, liver, leafy greens, beans, and fortified cereals; use a straw for liquid iron to protect teeth.
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Quick Tip
Red cells are microcytic and hypochromic (small and pale).