Lung infection oral roxithromycin treatment for one week is ineffective, it is recommended to go to the hospital in time to examine the cause of the disease, give targeted treatment. Each antibiotic has its own scope of application, roxithromycin belongs to the macrolide antibiotics, mainly applicable to pneumococcus, chlamydia, mycoplasma and other pathogens caused by lung infection. 1. Oral medication for one week did not control the condition, may be infected bacteria have drug resistance or erythromycin is not sensitive to infected bacteria, it is recommended to go to the hospital for bacterial culture and drug sensitivity tests and other tests, to clarify the infecting pathogen. 2. There may also be new pathogens, such as respiratory viruses, fungi and other pathogens, when the use of erythromycin is mostly ineffective. If the patient’s lung infection persists without improvement, other causes of lung infection should also be considered, such as obstructive pneumonia caused by lung cancer, etc. It is recommended to go to the hospital in time to improve the relevant laboratory tests to give targeted treatment.