Azithromycin belongs to the macrolide class of antibacterial drugs, and can not be said to be the most powerful antibiotic, when the treatment of infections caused by strains of bacteria sensitive to it is more effective, but ineffective against other strains of bacteria. Azithromycin mainly on gram-positive bacteria and atypical pathogens have a relatively good antibacterial effect, such as can be used for Staphylococcus aureus, Streptococcus pneumoniae, hemolytic streptococcus, Haemophilus influenzae, Catamorpha infections Legionella, Mycoplasma, and other common pathogenic bacterial infections. However, it cannot be used to treat gram-negative bacterial infections such as Escherichia coli and meningococcus. Adverse reactions such as diarrhea, abdominal pain, and nausea may occur during azithromycin use. The drug is contraindicated in patients who are allergic to macrolides or ketolactones. If severe allergic reaction occurs during the use of the drug, the drug should be stopped immediately for symptomatic treatment, and if abnormal liver function occurs during the use of the drug, the drug should be stopped immediately. Note that the drug should be used under the guidance of a doctor, avoid unauthorized use of the drug, so as not to cause adverse effects. If the symptoms are not relieved during the use of the drug, it is recommended to consult a doctor in time, improve the relevant examination, clarify the cause of the disease and symptomatic treatment.