Bromhexine is a chemical substance whose main component is platyphylline. This drug can dilute sputum and promote sputum discharge, and it can also promote the movement of cilia on the surface of the airway tube wall, which can increase the discharge of sputum. For patients with acute attacks of chronic bronchitis, acute bronchitis, and lung diseases such as emphysema and bronchiectasis, if the patient’s sputum is sticky and not easy to cough up, it can achieve a certain relief effect, and it can reduce the resistance, and can relieve the symptoms of shortness of breath and wheezing, this drug can generally be taken orally, nebulized inhalation, or directly through the bronchial fiber endoscope into the trachea by drops and This drug can be administered orally, by nebulized inhalation, or directly into the trachea through the endobronchial fiber.