Montelukast sodium is mainly used in allergic rhinitis and bronchial asthma, its main pharmacological effect is leukotriene receptor modulator, through the drug to reduce airway hypersensitivity, to achieve the effect of cough and asthma, mainly to play its anti-allergic effect. The use of montelukast sodium is more widely used, belonging to the bronchial asthma and allergic rhinitis commonly used drugs, need to pay attention to is in the taking of the drug may be excited and other corresponding adverse drug reactions, in the use of drugs need to carry out the corresponding monitoring, the condition of the control after the adjustment of the drug under the guidance of the doctor.