Amoxicillin can treat pneumonia caused by sensitive bacteria and should be used as prescribed by the doctor. But the cause of pneumonia in addition to bacterial infection, there may be Mycoplasma pneumoniae, viruses and other factors caused by the use of amoxicillin in these cases can not achieve the therapeutic effect. Amoxicillin can be used for pneumonia caused by Streptococcus pneumoniae, Streptococcus haemolyticus, Staphylococcus, Haemophilus influenzae and so on. Its adverse reactions include diarrhea, nausea, rash, leukopenia, thrombocytopenia, and severe allergic reactions. Amoxicillin is contraindicated in persons with penicillin allergy, or positive penicillin skin test, or severe hypersensitivity reaction to cephalosporins. The presence of pneumonia should be under the guidance of a doctor to rationalize the use of drugs, so as not to miss the disease.