There is no effective medicine for lung cancer, but dissolving mucous phlegm and relieving cough and phlegm can be carried out to relieve the symptoms. At present, there is no effective medicine for lung cancer, generally radiotherapy and targeted drug therapy are for the tumor itself, which cannot control the complications such as phlegm and cough. Therefore, it can be combined with other drugs to relieve the symptoms. If the sputum is sticky and difficult to cough out, it can be treated by dissolving mucous sputum, such as acetylcysteine effervescent tablets, which makes the sputum easier to cough out. However, if cough and sputum are the main symptoms, then Ambroxol can be used orally or nebulized to improve the cough and sputum symptoms, thus improving the general state. There is no specific drug, do not believe in Internet rumors or advertisements, and treat according to the doctor’s instructions.