Erythromycin dry suspension main side effects are: a, gastrointestinal reactions, erythromycin can cause gastrointestinal dysfunction in children and nausea, vomiting, abdominal distension, abdominal pain, diarrhea, loss of appetite and so on. Second, allergic reactions, individual children can appear allergic rash, low fever, eosinophilia. Third, hearing damage, erythromycin can lead to auditory nerve damage, hearing loss, reversible, after stopping the drug can be gradually recovered. Erythromycin can cause liver damage and transaminase elevation. E. Long-term and repeated application of erythromycin can cause low immunity, dysbiosis, induced fungal infections.