Montelukast Sodium is effective in treating cough caused by asthma, but not as effective if the cough is caused by other etiologies. 1. Montelukast sodium belongs to the selective leukotriene receptor antagonists, which can prevent and treat asthma in the long term. In addition, montelukast sodium can also prevent exercise asthma, as well as maintenance treatment and prevention of asthma with aspirin. If a patient develops a cough that is caused by asthma, treatment with montelukast sodium under the supervision of a doctor can be effective. 2. If the cough is caused by other reasons such as bacterial infection, or viral infection, treatment with montelukast sodium is not effective. 3. For the age of ≥ 15 years old people can follow the doctor’s advice to use montelukast sodium, but pregnant women, montelukast sodium ingredients allergy is prohibited. Breastfeeding women need to be careful, if the application of the drug is recommended to suspend breastfeeding. It is recommended that patients with cough need to consult a doctor, who will determine the effectiveness of treatment with montelukast sodium according to the cause of the disease.