2. For patients with severe cough, benproperine should be the first choice, followed by dextromethorphan.
3. Benproperine is used for daytime cough and dextromethorphan is used for nighttime cough.
4. For cough with cold, dextromethorphan is commonly used as a compound preparation, and preparations such as phenol, ephedrine, diphenol, misoprostol and pseudoephedrine can be taken. Don't eat irritating food.