Dioxopromethazine Hydrochloride, a respiratory medication, is a peripheral cough suppressant, an H1 receptor blocker, and also has an anti-metamorphic effect, or anti-allergic reaction. It is mainly used to treat cough, allergic asthma, urticaria and pruritus. It is not recommended if you have a cough with phlegm. When coughing with phlegm, if the cough suppressant is used, it is not conducive to the expulsion of phlegm and may aggravate the infection, so it is best not to take it. If the infection is bacterial, it is necessary to take antibiotics. If the infection is viral, it is necessary to take Pudilan anti-inflammatory oral solution. Cough suppressants are best taken when there is an irritating dry cough.