Allergic cough usually needs to be treated with leukotriene antagonists such as montelukast sodium, and loratadine is sometimes helpful as an adjunct. Allergic cough may require treatment with leukotriene receptor antagonists such as montelukast sodium, which can be helpful in controlling the condition, or with glucocorticoid medications such as inhaled budesonide aerosol. When allergic cough is accompanied by allergic rhinitis, loratadine may be used, which also has some adjunctive therapeutic effect. Montelukast sodium may cause adverse reactions such as anxiety, depression, dizziness, etc. It is contraindicated in people who are allergic to this product. Loratadine may cause dry mouth, drowsiness, and unresponsiveness, and driving is not recommended while taking the drug, and should not be used if you are allergic to the drug. Therefore, montelukast sodium and loratadine need to be used under the supervision of an offline doctor.