What to do with excessive phlegm cannot be generalized, but depends on the cause of the excessive phlegm. The most common are infectious diseases of the respiratory system, especially bacterial infections will see coughing, sputum, to anti-infective treatment with antibiotics, commonly used are penicillin class of amoxicillin or amoxicillin clavulanic acid potassium, cephalosporins class of cefadroxil, cefuroxime, cefdinir, and macrolide class of azithromycin, etc.. In the case of adults over 18 years of age, antibiotics of the quinolone class, such as levofloxacin mesylate and moxifloxacin, can also be used. If the phlegm is particularly abundant and cannot be easily coughed out, in this case, you can take oral phlegm-reducing drugs, such as acetylcysteine, ambroxol hydrochloride, eucalyptus pinene enteric soft capsule, and carboxymethylstilbestrol oral solution, all of which have the effect of diluting phlegm and promoting phlegm discharge. The treatment plan of acetylcysteine nebulization can also be used to dilute sputum and promote sputum expulsion. Of course, there are also intravenous phlegm-suppressing drugs, such as amiloride hydrochloride.