Dioxopromethazine is an antihistamine that is relatively stronger than the clinically available isoprostanes. This drug can mainly play an anti-allergic role, and is used clinically for chronic bronchitis with wheezing as well as cough, wheezing and shortness of breath caused by bronchial asthma and cough variant asthma. Some patients will experience some side effects when taking the drug, such as drowsiness, fatigue, drowsiness and other symptoms. Since the therapeutic dose of the drug is close to the toxic dose, do not overdose. Use with caution in patients with allergies to this drug itself and in patients with epilepsy and hepatic insufficiency.