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Digoxin toxicity — GPhC CRA MCQ

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HardCardiovascular TherapeuticsDigoxin toxicityGPhC CRA

A 63-year-old woman taking digoxin 125 micrograms daily and furosemide reports nausea, yellow visual halos and palpitations. Bloods show potassium 3.0 mmol/L and eGFR 42 mL/min/1.73 m². What monitoring is required?

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Correct answer: E — Arrange urgent digoxin level, electrolytes and renal function review

Symptoms, hypokalaemia and reduced renal function suggest digoxin toxicity risk. Hypokalaemia potentiates digoxin toxicity and may be caused or worsened by loop diuretic therapy. Digoxin concentration, electrolytes and renal function need urgent review. Continuing unchanged could risk arrhythmia.

Reference: BNF