Amoxicillin can be used for bronchitis caused by sensitive bacteria, but there are many causes of bronchitis, blind use of amoxicillin is not necessarily effective. The causes of bronchitis are bacterial infection, viral infection, allergic reaction, physical and chemical factors such as stimulation, generally manifested as coughing, coughing up sputum, occasionally with blood in the sputum and other symptoms. Treatment is generally symptomatic, such as cough and phlegm symptoms, you can use aminoglutethimide, bromhexine and other cough and phlegm drugs. Amoxicillin is a penicillin antibiotic with good antibacterial activity against Streptococcus pneumoniae, Streptococcus hemolyticus and other streptococci, Escherichia coli, Haemophilus hemophilus and so on. If bronchitis is caused by the above sensitive bacteria, taking amoxicillin can effectively treat bronchitis. However, if bronchitis is caused by other bacteria or other causes, amoxicillin is less effective. Adverse reactions such as nausea, diarrhea, and rash may occur with the use of Amoxicillin, and it is contraindicated for those who are allergic to penicillin and beta lactam preparations. Bronchitis patients need to be diagnosed by a physician to choose the appropriate medication according to the cause of the disease, should not blindly use drugs to avoid delaying the condition.