Menlustat sodium is not recommended for 3-year-old baby girl with simple cold and cough, but it can be taken in combination with allergic diseases. Montelukast sodium is a non-hormonal anti-inflammatory drug, belongs to the leukotriene receptor antagonist, can improve airway inflammation, airway hyperresponsiveness, mainly used for asthma, allergic diseases, etc., which does not belong to the cough suppressant drugs, so the cough caused by simple colds is not recommended to take Montelukast sodium, but can be eaten in combination with allergic diseases. Children with a cold and cough symptoms are not obvious to take cold medicines, if the cough is more obvious with cough medication is recommended, such as orange shellfish combined. 3-year-old baby girl with a cold and cough is recommended to consult a doctor, do not recommend taking medication on their own, should follow the doctor’s instructions for medication, so as not to delay the condition or due to the medication is not symptomatic caused by the aggravation of the condition.