Ambroxol is not an antibiotic, but a sputum-thinning drug, which means that it makes the sputum a little thinner, easier to cough up, and makes it less sticky. At this time, it causes the mucous membrane of the trachea to secrete plasma substances, and these substances can help to thin the sputum. In addition, it also promotes the oscillation of cilia, which is also helpful in the expulsion of phlegm. Antibiotics are mainly anti-inflammatory drugs for bacterial infections. The more commonly used clinical antibiotics are cephalosporins, representing drugs such as cefixime, cefradine, cefoperazone, cefadroxil, ceftriaxone. Also, penicillin antibiotics, such as semi-synthetic ampicillin, or oral amoxicillin, amoxicillin clavulanic acid potassium are all penicillin antibiotics. There are also macrolide antibiotics that can be used to treat mycoplasma, or chlamydia infections, such as azithromycin.