The investigators randomized 230 adults diagnosed with acute bronchitis to receive either azithromycin or vitamin C for 5 days, along with liquid dextromethorphan and an albuterol inhaler.

• 研究者把230名诊断为急性支气管炎的成年患者随机分为两组，接受连续5天的阿齐黴素或维生素C治疗，同时给予脂溶性右甲吗喃和一种沙丁胺醇吸入剂。