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General Medicine · Clinical pharmacology: digoxin toxicity
Sample itemA patient taking digoxin develops nausea, confusion, yellow-green visual halos, and atrial tachycardia with block. What is the diagnosis?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. Digoxin toxicity
Digoxin toxicity can cause gastrointestinal, neurologic, visual, and diverse cardiac rhythm disturbances. Potassium level, renal function, drug interactions, and severity guide treatment including digoxin immune Fab in selected cases.
Option by option
A. Beta-blocker withdrawal
Beta-blocker withdrawal causes tachycardia but not xanthopsia.
B. Opioid overdose
Opioid overdose causes miosis and respiratory depression.
C. Lithium toxicity
Lithium toxicity causes tremor, ataxia, and confusion.
D. Digoxin toxicity (correct)
Correct. Visual color disturbance with characteristic arrhythmia is highly suggestive.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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