Montelukast is a prescription drug and is generally recommended to be taken once a day. For how long you need to take it, you need to consult your doctor who will administer it reasonably according to the patient’s specific condition. Montelukast, a leukotriene receptor antagonist, is a first-line drug for the prevention of asthma, and is also used for allergic rhinitis, sports asthma, and asthma caused by aspirin allergy. In patients with allergy and asthma, it helps to reduce allergic inflammation in the respiratory tract, which in turn relieves symptoms and reduces the patient’s dependence on hormones. However, patients must follow strict medical advice when using montelukast to prevent side effects such as headache, earache, sore throat, and neuropsychiatry, and especially children and pregnant women must consult their doctor before using the drug. Usually, montelukast can be used continuously for 1-3 months in moderate doses, but the exact duration of use should be determined by the treatment plan after the doctor’s consultation.