Azithromycin syrup is a type of oral suspension syrup used to treat various bacterial infections. Azithromycin belongs to the class of antibiotics called macrolides. It works by stopping the growth of bacteria, thus preventing the infection from spreading. The dosage and duration of treatment with azithromycin syrup will depend on the type and severity of the infection, as well as other factors such as age, weight, and medical history. It is important to take the medication exactly as prescribed by your healthcare provider. Common side effects of Azeon-200 include nausea, diarrhea, stomach pain, and vomiting.