Montelukast sodium can be used as an adjunct to the treatment of adenoid hypertrophy. Montelukast sodium is a leukotriene receptor antagonist that has a relatively important role in blocking leukotrienes that cause inflammation. Leukotrienes are an important causative factor in allergic rhinitis, capillary bronchitis, asthma, adenoid hypertrophy and other allergic diseases. Montelukast sodium interferes with the binding of leukotrienes to receptors on the surface of adenoids so that inflammatory factors cannot accumulate in the airways and then cannot be activated, which can effectively reduce mucosal enlargement, promote the clearance of airway secretions, and reduce airway hyperreactivity, among other effects. Therefore, treatment with leukotrienes can restore nasal drainage, which can reduce the stimulation of inflammatory factors on adenoids and help accelerate the relief of adenomegaly symptoms.