LBP is an anti-allergy drug, which is mainly used in clinical practice for the treatment of allergic diseases, including allergic rhinitis, urticaria, food and drug allergy. However, it is generally not used for the treatment of asthma. After using the medication, most of the symptoms can be reduced and relieved. Some patients will have certain side effects after taking the medication, mainly dry mouth, drowsiness and drowsiness, all of which do not affect the continuation of the medication, so do not work at height, drive or ride a car, or operate precision instruments during the medication period.