The main ingredient of Montelukast Sodium Granules is Montelukast Sodium, which is usually taken orally once daily. It should be used under doctor’s supervision, and the dosage is different for different diseases and different people. Sodium montelukast is a leukotriene receptor antagonist used for the prevention and long-term treatment of asthma in children over 1 year of age and for the relief of allergic rhinitis in children between 2 and 5 years of age.The safety and efficacy of the drug in children under 6 months of age have not been established. Dosage of Montelukast Sodium Granules: once daily. Asthma patients should take it at bedtime. Patients with allergic rhinitis can take the medication as needed for their condition. Patients with both asthma and allergic rhinitis should take the medicine once a night. Children aged 1 to 2 years with asthma should take 4mg once a day; children aged 2 to 5 years with asthma or allergic rhinitis should take one 4mg sachet of oral granules daily. Oral granules can be taken directly or mixed with soft foods, infant formula or breast milk. Care should be taken to open the sachet of the medicine only at the time of administration, and the full dose should be taken within 15 minutes of opening the sachet. The product is generally well tolerated with mild adverse effects. Patients should strictly follow the doctor’s instructions to regulate the use of drugs, avoid self-medication, and should pay attention to a healthy lifestyle.