Montelukast Sodium is a western drug, which belongs to the category of leukotriene receptor antagonists, and is mainly used for the prophylaxis and long-term treatment of asthma and the relief of allergic rhinitis symptoms in adults aged 15 years and older. Adverse reactions to Montelukast Sodium are upper respiratory tract infections, increased tendency to bleeding, and hypersensitivity reactions. It is contraindicated in people who are allergic to any of the components of this drug. This drug is not used to do acute asthma attacks, is not a substitute for glucocorticoids, is contraindicated in pregnant and lactating women, is not suitable for the elderly. Montelukast Sodium is a potent oral preparation that effectively improves inflammatory markers in asthma, is rapidly and completely absorbed orally, and can be almost completely metabolized. It should be stored in a cool and dry place, protected from light and sealed. Different dosage forms for different conditions should be taken on time as prescribed by the doctor.