Serrapeptase, also known as Sarcopeptidase, is a proteolytic enzyme produced by bacteria of the genus Sarcoptes, which is extracted and made into an oral medicine. Serrapeptase is an anti-inflammatory and anti-swelling agent, and also reduces the viscosity of sputum and pus, diluting them and making them easier to expel. Serrapeptase is mainly used clinically to reduce swelling caused by surgery, trauma, patients with chronic sinusitis and women with lactation; patients with acute and chronic bronchitis, pneumonia, bronchiectasis, bronchial asthma and other respiratory diseases can also take serrapeptase orally when they have sticky sputum that is not easy to cough up; some patients after anesthesia also have sticky sputum and have difficulty coughing up sputum, and taking serrapeptase orally is also effective. The safety of serrapeptase in children has not been determined, and it is not clear whether it can be used in pregnant and lactating women, so serrapeptase is not used in children, pregnant and lactating women.