❤️ Digoxin Toxicity: NCLEX Pharmacology Breakdown
Digoxin is a cardiac glycoside used in heart failure and atrial fibrillation — and its toxicity risks make it a favorite on the NCLEX.
It overlaps with:
Pharmacology
Cardiovascular disorders
Electrolyte imbalance
📊 Digoxin NCLEX Cheat Sheet
| Therapeutic Range | 0.5–2.0 ng/mL |
|---|---|
| Toxic Level | Greater than 2.0 ng/mL |
| Early Signs | Nausea, vomiting, anorexia |
| Visual Symptoms | Blurred vision, yellow halos |
| Cardiac Effects | Bradycardia, AV block |
| Antidote | Digoxin Immune Fab (Digibind) |
| Potassium Role | Hypokalemia increases toxicity risk |
🧠 NCLEX Tip: Low Potassium = High Digoxin Risk
Hypokalemia increases sensitivity to digoxin, so always check electrolytes — especially in patients on diuretics.
🩺 Nursing Interventions
Monitor apical pulse for 1 full minute
Hold if HR < 60 bpm (adult), < 100 bpm (infant)
Check digoxin blood levels regularly
Assess vision and GI symptoms
Monitor K⁺ levels, especially with diuretics
Keep Digibind on hand for emergencies
💡 Mnemonic: “D.I.G. SLOW”
| D | Don't give if pulse is low |
|---|---|
| I | Investigate potassium level |
| G | GI signs – nausea, anorexia |
| S | See yellow halos |
| L | Low heart rate = possible toxicity |
| O | Observe for vision changes |
| W | Watch for level >2.0 ng/mL |
📲 Learn Cardio Meds with KOTC
🫀 Cardiac pharmacology flashcards
💊 Digoxin vs beta blocker comparisons
⚡ NCLEX-style bradycardia scenarios
Start studying smarter at kingofthecurve.org/studyscience
🏁 Final Thoughts
Digoxin has a narrow therapeutic window and early signs can be subtle.
NCLEX wants you to catch the clues early — before it turns fatal.
Frequently Asked Questions (FAQs)
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