When coughing and coughing up green sputum, this clinical manifestation is most commonly associated with the presence of purulent bacterial infections in the body. The most common purulent bacteria is Pseudomonas aeruginosa, which is relatively virulent and can easily lead to bronchitis, pneumonia, and even lung abscess. At this time, you can choose antibiotics that are sensitive against Pseudomonas aeruginosa, such as aminoglycosides including gentamicin and tobramycin. Cephalosporins can also be chosen, such as ceftazidime and cefoperazone sulbactam sodium. You can also use a combination of quinolones, such as lomefloxacin, flurofloxacin, levofloxacin and other drugs.