Lung cancer pleural fluid (fluid that stays in the thoracic cavity) belongs to the categories of branching drink and hanging drink in traditional Chinese medicine, which are generally not treated with wuling capsule. Wu Ling Capsule is composed of Zea mays, Poria, Poria, Poria, Cinnamon, Atractylodes Macrocephala (fried). It has the efficacy of warming yang and transforming qi (warming the body’s yang qi), inducing dampness and promoting the flow of water. It is used for edema caused by Yang not transforming qi (the body’s qi is blocked), water-dampness internal stagnation (water-dampness stays in the body), with symptoms such as dysuria (unruly urination), edema and abdominal distension, vomiting and diarrhea, and thirst for water. The adverse reactions and contraindications of Wuling Capsule are not clear, drug interactions may occur if used concurrently with other drugs, please consult your physician or pharmacist for details. Patients with pleural fluid of lung cancer are advised to seek medical treatment promptly. If you need to use Wu Ling Capsules, it must be used under the guidance of professional doctors.