It is not certain whether levofloxacin or azithromycin is better for patients with bronchitis, for example, for chronic bronchitis, levofloxacin is usually more effective. For acute tracheobronchitis caused by mycoplasma infection, azithromycin is more effective, and levofloxacin is prohibited for use under the age of 18. The selection of antimicrobial drugs is not a single judgment based on the patient’s disease itself, specific clinical characteristics to determine which pathogenic bacteria infection, and then empirical selection, the most scientific means of selecting the medication is through the pathogenic bacteria bacterial culture and drug sensitivity test results to select the medication.