Roxithromycin in the treatment of chronic sinusitis, there must be a clear basis for bacterial infection, and confirmed that the causative organism for the sensitivity of roxithromycin, before use, should be examined and clarified by a specialist doctor to use the drug treatment. As a rule, adults take 150 mg orally before meals, twice a day; children should be calculated according to kilograms of body weight, in general, the total amount of 2.5-5 mg per kilogram a day, taken twice a day. 5-10 mg per kilogram of body weight twice a day, taken orally on an empty stomach. Roxithromycin is a prescription medication and may cause adverse reactions such as nausea, vomiting, abdominal pain, and diarrhea when taken. Patients must strictly follow the doctor’s instructions for medication, not unauthorized self-medication in accordance with the instructions of the drug. Roxithromycin has a good antibacterial effect, for sensitive bacteria caused by sinusitis has a good therapeutic effect, can effectively control the symptoms of sinusitis.