The child has been coughing for three days with a feeling of phlegm in the lungs. Is it possible to take ammonium bromide injection orally, and what is the recommended dosage? The answer mentions that it could be caused by bronchitis and suggests visiting the hospital for a definitive diagnosis before treatment. It also advises that if diagnosed with bronchitis, oral ammonium bromide can be considered, with specific usage and dosage to follow the instructions. Additionally, anti-inflammatory drugs like cefixime can be taken. If symptoms do not improve, it is recommended to seek pediatric treatment, wishing the child a speedy recovery. Besides symptomatic treatment, the patient’s diet and mental state are also very important. It is advised to maintain a cheerful mood and proper diet to avoid affecting the recovery process.