The effective medicine for expectorant of lung cancer depends on which cause of the disease and the condition of the sputum. Nebulization, such as amiloride, drug expectorant, such as mucolytic agent, such as acetylcysteine effervescent tablets, oral mucus promoter, such as potassium iodide, bromhexine, bispirin, carboxymethylcysteine, drugs that stimulate the vagus nerve reflexly to increase bronchial mucus secretion and directly stimulate bronchial glands, such as guaiacol glycerol ether and guaiacol sodium sulfonate. There are also Chinese medicines, such as loquat cough syrup, fresh bamboo leech oral liquid, Luo Han Guo cough syrup and so on. If there is yellow pus sputum combined with bacterial infection, you can add penicillin or cephalosporins or quinolones to strengthen anti-inflammatory treatment and accelerate the absorption of sputum to reduce.