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The question
A 26-year-old man with rifampicin-resistant, fluoroquinolone-sensitive pulmonary TB is on the 6-month BPaLM regimen. At week 10 he reports burning numbness of both feet and blurred vision with poor colour discrimination. Haemoglobin has fallen from 12.8 to 9.6 g/dL and platelets to 90,000/µL. Which drug is the most likely cause?
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