If a patient suffers from bronchitis, whether or not taking Roxithromycin works depends on the pathogenic bacteria of the infection. If the bronchitis is due to a pathogenic bacterial infection such as chlamydia or mycoplasma, taking erythromycin will work. If the infection is not caused by chlamydia or mycoplasma, but by other pathogens, erythromycin usually does not work. Patients suffering from bronchitis should not take erythromycin without authorization, if the abuse of antibiotics, it is easy to lead to the phenomenon of bacterial imbalance in the patient’s body, and it is easy to lead to the emergence of drug-resistant patients, which is extremely detrimental to the body. It is recommended that patients go to the hospital to do sputum culture, according to the results of the sputum culture to choose sensitive antibiotics for treatment, can play a very good therapeutic effect.