Prostatitis is divided into acute prostatitis and chronic prostatitis. Due to the patient’s condition, physical condition is different, so how long does it take for prostatitis to take Roxithromycin is not supported by the data and can not be judged, some patients may use about 7~15 days to have an effect. Acute prostatitis is mainly bacteria, including coliform bacteria, Escherichia coli, streptococcus, etc., into the urethra, bladder, prostate and other parts of the formation of a local bacterial accumulation, causing urinary frequency, urinary urgency, urinary pain, hematuria, fever, chills and other symptoms. Roxithromycin is a macrolide, which is generally effective against such bacteria. However, there is no data to support how long to use it, clinically, some patients may use it for about 7~15 days to have an effect. Chronic prostatitis is mainly caused by non-bacterial infections, including mycoplasma, chlamydia and other infections. Roxithromycin is not useful for such bacterial infections. For the treatment of such patients, alpha-blockers, such as terazosin, are usually used. There is no specific time for how long a patient needs to take them because of the different absorption of their effects. If the patient’s medication is well absorbed, the time to take the medication will be short, and vice versa, the time will be lengthened. Roxithromycin is used for all kinds of inflammation caused by purulent streptococcus bacteria, and may cause abdominal pain, diarrhea, nausea, vomiting and other adverse reactions, it is recommended to stop the drug in time to see a doctor. It is contraindicated for those who are allergic to this product, erythromycin or other macrolides. Compatibility with ergotamine and dihydroergotamine is contraindicated. In addition, it is recommended that patients with prostatitis follow the doctor’s instructions for medication to avoid delays.