1. Patients with lung cancer should avoid drinking alcohol, at least during chemotherapy and targeted therapy. Because alcohol will increase the burden of liver and kidney function, affect the metabolism and discharge of therapeutic drugs, and also affect the efficacy of drug therapy. 2. Lung cancer patients should avoid drinking tea, at least during chemotherapy and targeted therapy. Excessive intake of these two substances will affect the secretion of digestive juices and thus the absorption of energy, which is obviously not beneficial to lung cancer patients who need to consume sufficient energy and preserve their physical strength.