There is no specific drug for cough and phlegm, the drugs for cough are dextromethorphan, codeine, etc., and the drugs for phlegm are aminoglutethimide and acetylcysteine. 1. Dextromethorphan: Dextromethorphan is a kind of centralized cough suppressant, suitable for patients with dry cough caused by bronchitis, pharyngitis, and so on. 2. Codeine: Codeine is a kind of opiate, applicable to various causes of irritating dry cough, especially for patients with chest pain triggered by dry cough. 3. Ambroxol: Ambroxol is an expectorant, suitable for bronchitis, pneumonia and other causes of sputum thick and not easy to cough out patients. 4. Acetylcysteine: Acetylcysteine is a mucolytic agent, which has a strong mucolytic effect on phlegm. All kinds of cough and phlegm medicines have corresponding adverse reactions and contraindications, cough and phlegm symptoms, please go to the respiratory medicine department of the regular hospital in a timely manner, under the guidance of the doctor to use drugs.