Amiloride hydrochloride can promote the mucous membrane of the respiratory tract to secrete a large amount of plasma, which can help dilute the phlegm, thus achieving the purpose of phlegm, after the phlegm becomes thinner, it will be easier to cough out, you can use the nebulizer for nebulizer inhalation treatment. You can also use aminoglutethimide hydrochloride for oral treatment, which has a better effect on phlegm. If you have yellow phlegm, most of the coughs are caused by lung heat, so you need to use Chinese medicines that have a clearing and detoxifying effect to stop coughing and resolve phlegm, such as Lung Power Cough Compound, which is particularly effective in resolving yellow or pus phlegm. You can also use the compound Fresh Bamboo Leach Liquid or Gou Huang Snake Gall Bladder and Chuan Bei Liquid, which are also very effective in resolving pus phlegm, especially for coughs caused by wind-heat or lung-heat.