How to discharge pleural effusion of lung adenocarcinoma needs to choose the treatment method according to the condition. If the pleural effusion is too much, pleural drainage can be used, and a small amount of chemotherapy, radiotherapy and other treatment methods are feasible. 1. If the pleural fluid is too much, it will cause respiratory difficulty, and in serious cases, it may be life-threatening, which often requires repeated thoracocentesis to draw out the fluid, or closed thoracic drainage can also be used. 2. Treatment of primary disease: primary lung adenocarcinoma can be treated by chemotherapy and surgery. Usually, malignant pleural fluid is already in advanced stage and cannot be treated by surgery, so it is feasible to infuse chemotherapy drugs such as cisplatin into the thoracic cavity. It is recommended to go to the hospital in time and standardize the treatment under the doctor’s guidance to avoid delaying the condition of lung adenocarcinoma with pleural effusion. Please strictly follow the doctor’s instruction for drug treatment and do not use drugs by yourself.