Dioxopromethazine is a new drug with fewer side effects and a wider range of safety, it is an antihistamine, the antihistamine effect is similar to that of promethazine, and the mechanism of action is also the same. In addition and isoprinosine, has obvious central sedative effect, cough effect is also due to the central role of cough as well as the role of asthma, can also be used as a mucosal surface local anesthetic, but also can increase the body’s immune function, especially cellular immunity. There is basically no effect on the body’s function, and the side effects are very small. About half an hour after taking the drug can appear to stop coughing and asthma effect, the duration is also relatively long, can reach 6, 7 hours, no addiction, can be used to treat chronic bronchitis, cough suppressing effect is particularly significant. In addition can also be used to treat allergic asthma, urticaria and itchy skin symptoms, cough suppressant effect can be comparable to codeine.