There is no ranking of cough and phlegm, clinically, cough and phlegm are two different ways of expression, cough with cough phlegm difficulty, should be used under the guidance of a professional doctor expectorant drugs, cough medicine, so as to avoid the accumulation of phlegm is difficult to discharge, triggering asphyxia. 1. Cough suppressants: commonly used clinical drugs according to the mechanism of action is broadly divided into central cough suppressants, peripheral cough suppressants, representative drugs such as codeine phosphate, dextromethorphan hydrobromide, Pentoxyverine citrate, Nystatin hydrochloride, etc., because of the drug has the precautions, adverse reactions and contraindications, you need to comply with the instructions of the doctor to use the drug, do not use the drug, so as to avoid the adverse consequences. 2. Phlegmolytic drugs: phlegmolytic drugs broadly include sputum-thinning drugs, mucous phlegmolytic drugs, mucous phlegm-thinning drugs on behalf of the drugs have ammonium chloride class nausea expectorant, guaiac glycerol ether class stimulating expectorant, etc. Mucous phlegmolytic drugs commonly used in clinical practice broadly include acetylcysteine, deoxyribonuclease, bromohexine and so on. Drugs have contraindications, precautions, adverse reactions, need to be taken under the guidance of a medical professional. If you have cough and phlegm symptoms, you should consult a doctor in time, not self-medication, the above drugs should be taken under the guidance of a professional doctor, and should not be taken privately to avoid adverse consequences.