9.下列有關COPD藥物之描述何者錯誤?
(A) Some patients with refractory dyspnea will experience improved exercise tolerancewith theophylline
(B) For patients with recurrent exacerbations (eg, at least two per year or one requiringhospitalization) despite triple inhalers, the phosphodiesterase-4 inhibitor roflumilastmay reduce the frequency of exacerbations
(C) For patients with recurrent exacerbations prolonged use of azithromycin may reducethe frequency of exacerbations
(D) Azithromycin should be avoided in patients with a short QT interval