There are many reasons for coughing up white sputum in the elderly, which is common in chronic obstructive pulmonary disease, bronchitis and tuberculosis. 1. Chronic Obstructive Pulmonary Disease (COPD): Patients with chronic obstructive pulmonary disease (COPD) will have chronic cough and sputum, and the sputum will be white during the stabilization period, which is mainly due to the stimulation of soot and dust, and bronchodilators should be used, such as salbutamol and ipratropium bromide. 2. Bronchitis: If the patient has the phenomenon of coughing up white sputum for a long time, it belongs to chronic bronchitis, which is mainly related to air pollution and smoking. You can use drugs to dissolve phlegm, such as aminobromine hydrochloride, carbocysteine, etc., with antibiotic treatment, such as levofloxacin, moxifloxacin, etc.. 3. Tuberculosis: Tuberculosis infection can also cause the phenomenon of coughing up white sputum, which is caused by tuberculosis mycobacterium infection, you can use isoniazid, rifampicin, levofloxacin and other drugs to treat. The elderly cough white sputum has many factors, it is recommended to go to the hospital in a timely manner, improve the examination, clear the cause of the disease, under the guidance of the doctor for standardized treatment. The above drugs should be used under the guidance of the doctor.