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MediumRespiratory MedicineCOPDus-abfmus-abimus-usmle-step-2

A 63-year-old smoker presents with productive cough and wheeze. Spirometry shows FEV₁/FVC 0.58 and FEV₁ 55% predicted. Persistent dyspnea and 2 exacerbations last year despite LAMA. Next-step pharmacologic therapy?

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