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General Medicine · Respiratory medicine: aspirin-exacerbated respiratory disease
Sample itemA 35-year-old woman with asthma and recurrent nasal polyps develops severe bronchospasm with rhinorrhoea within an hour of taking ibuprofen. Which drug is a suitable add-on for her long-term control?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Montelukast
Cyclo-oxygenase inhibition diverts arachidonic acid towards the 5-lipoxygenase pathway, and the excess cysteinyl leukotrienes cause bronchospasm. A leukotriene receptor antagonist is therefore a logical add-on to inhaled steroids, and cyclo-oxygenase inhibitors should be avoided.
Option by option
A. Cromolyn sodium
Cromolyn stabilises mast cells and has a minor role in adult asthma.
B. Tiotropium
Tiotropium is a long-acting antimuscarinic and does not target the leukotriene mechanism.
C. Montelukast (correct)
Correct. A leukotriene receptor antagonist blocks the mediators that drive this phenotype.
D. Theophylline
Theophylline is a weak bronchodilator with a narrow therapeutic window and no specific benefit here.
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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