Montelukast Sodium Tablet is an asthma medication, commonly used in the prevention and long-term treatment of asthma, because asthma is prone to nighttime attacks, so Montelukast Sodium Tablet is recommended to take before bedtime. Asthma is prone to attacks at night for various reasons, such as changes in vagal excitability, changes in airway smooth muscle tone, airway phlegm obstruction, etc. Taking the asthma-alleviating drug Montelukast Sodium Tablet before bedtime is conducive to lowering the probability of nocturnal asthma attacks, so as to enable the patients to relieve their symptoms and improve the quality of sleep. Taking this drug may cause allergic reactions, nausea and vomiting, dyspepsia, dizziness, drowsiness, panic, abnormal liver function and other adverse reactions. It is also important to note that it is contraindicated for those who are allergic to any of the ingredients in this product, and pregnant and lactating women need to use it with caution under medical supervision. Therefore, during the period of taking Montelukast sodium tablets patients should strictly follow the doctor’s instructions to take on time and in accordance with the dosage, so as to avoid fluctuations in drug concentration and affect the therapeutic effect.