One and a half year old baby coughing throat phlegm may be upper respiratory tract infections, bronchial asthma, pediatric pneumonia and other diseases, patients need to follow the doctor’s instructions for drug treatment. 1. Upper respiratory tract infections: upper respiratory tract infections caused by viruses, generally no special use of antiviral drugs. If combined with bacterial infection, should follow the doctor to use cefixime, amoxicillin and other antibacterial drugs. Coughing up phlegm is the body’s normal way of expelling germs, it is not recommended to give children cough suppressants, you can take honey or hot pear soup to relieve throat discomfort through daily use. 2. Bronchial asthma: need to be under the guidance of a doctor, the use of inhaled glucocorticoid drugs, such as inhalation budesonide suspension; anti-leukotriene drugs, such as montelukast sodium granules. 3. Pneumonia: Usually, patients with bacterial pneumonia can be treated with antibiotics such as amoxicillin and ceftriaxone as prescribed by the doctor, and in case of mycoplasma pneumonia, antibiotics such as azithromycin can be used. If it is caused by influenza virus, it can be treated with antiviral drugs such as oseltamivir. All of the above medications should be used under the guidance of a doctor to avoid self-medication. It is recommended that if a one and a half year old baby coughs and has a phlegm in his throat, the parents should take the child to the doctor in time to find out the cause of the disease and target the treatment.