The drug can act directly on the glands of the respiratory bronchi, causing the release of mucus secreting cell lysosomes, which can reduce the viscosity of mucus, and also cause the secretion of small molecules of mucin in the respiratory tract, making the sputum thinner and thinner and easier to cough out of the body. The drug is mainly used for patients with acute and chronic bronchitis, bronchiectasis with infected pneumonia, bronchopneumonia, acute exacerbation of chronic obstructive pulmonary disease, emphysema, interstitial pneumonia, interstitial fibrosis of the lung, lung cancer and other respiratory diseases where the sputum is more viscous and not easily coughed out.