Dioxopromethazine is a new drug with relatively few side effects and a wide range of safety. It is an antihistamine, and its antihistamine action is similar to that of promethazine, and its mechanism of action is the same. In addition, like promethazine, it has obvious central sedative effect, cough suppressant effect also because of the central cough suppressant effect and the effect of asthma, it can also be used as a surface local anesthetic of mucous membrane, and it can also increase the immune function of human body, especially cellular immunity. There is basically no effect on the body’s functions and the side effects are minimal. It can be used to treat chronic bronchitis, and the effect of cough suppression is particularly significant. It can also be used to treat allergic asthma, hives and itchy skin, and its cough suppressant effect can be comparable to codeine.