If the cough does not stop after stopping montelukast sodium, scientific discontinuation of the drug and anti-allergy treatment should be taken according to the uncontrolled condition or allergy. 1. If the cough does not stop after stopping montelukast sodium, the first consideration is that the disease is not yet under control. Since oral treatment with montelukast sodium is needed, it may be allergic cough, cough variant asthma and other diseases. Discontinuing the medication immediately before the condition is fully under control can lead to a recurrence of the condition. The medication should be gradually stopped or changed under the guidance of a doctor, and may even need to be added (e.g. bronchodilator salbutamol, etc.), and should not be stopped on its own. 2. Allergies can also be caused by other substances, such as allergies to willow, pollen and other substances, which can produce an allergic cough. Especially when the drug is stopped, it can be manifested as a cough that does not stop. Antihistamine therapy can be combined with drugs such as loratadine. 3. 3. It is also necessary to consider whether there is a combination of other diseases that cause cough, such as colds, bronchitis, lung cancer and so on. Therefore, it is recommended to consult a doctor in time, complete the relevant laboratory tests and examinations to evaluate the condition, exclude other diseases, and follow the doctor’s instructions for scientific medication and treatment.