Montelukast, a leukotriene receptor blocker, is mainly indicated for the treatment of obstructive airway diseases, which can improve the inflammation of airways and also inhibit the smooth muscle spasm of airways to effectively control the symptoms of asthma. It can be used clinically for the prevention and treatment of asthma, and can be taken orally by patients over 15 years old. It also has a certain therapeutic effect on allergic diseases, but if the symptoms are more serious, it needs to be combined with glucocorticoid drugs for comprehensive treatment. In case of acute asthma attack, it is better not to use this drug, but to choose airway dilators and glucocorticoids for treatment. Its need to be taken orally at bedtime, you can take one tablet at a time, although the side effects of this drug is not very big, but also need to be taken orally under the guidance of a professional doctor.