When quitting smoking, sputum is difficult to discharge may be the lungs of the deposition of nicotine, tar and other chemicals in the tobacco, causing chronic inflammatory stimulation of the airway mucosa, phagocytosis of immune cells in the lungs and by the mucosal surface of the cilia are constantly pushed out, the formation of phlegm discharge, which is a very normal autoimmune adjustment to repair the process. Eucalyptus-Pinocampus enteric soft capsule, Ambroxol hydrochloride tablets, acetylcysteine nebulized inhaler and other medications are available on medical advice. 1. Eucalyptus-pinocampus enteric soft capsule: it can improve the ciliary movement of tracheal mucosa, promote the secretion of respiratory glands, increase the speed of mucus movement, and help to expel phlegm. Pregnant women and lactating women should be cautious of use, gastrointestinal discomfort and other adverse reactions may occur. 2. Ambroxol Hydrochloride Dispersible Tablets: Promote the discharge of respiratory mucus secretion, reduce mucus retention, and reduce the secretion of excessively viscous mucus, thus significantly promoting expectoration and improving respiratory conditions. It is contraindicated for those who are allergic to this product, and should be used with caution in pregnant and lactating women. Simultaneous use of central cough suppressants, such as dextromethorphan, should be avoided. 3. Acetylcysteine nebulized inhaler: Acetylcysteine breaks the disulfide bond between mucin molecular complexes, reduces the viscosity of sputum, and makes sputum easy to cough up. Allergic to acetylcysteine is prohibited, the occasional allergic reaction when taking the drug, need to stop the drug observation. The above drugs are prescription drugs, for reference only, the specific dosage should follow the doctor’s instructions. Do not self-medicate to avoid adverse reactions.