If breathing reaches 40 times or more in the advanced stage of lung cancer, it can be treated by taking antispasmodic and asthma medicines, antibiotics, and drainage of fluid under the guidance of doctors, but the details have to be different from person to person, so it is recommended to go to the hospital in time and have targeted diagnosis and treatment. When the breath reaches more than 40 times in late stage of lung cancer, it indicates that dyspnea has already appeared, which can be caused by a variety of reasons, such as tracheal spasm, obstructive pneumonia, pleural effusion compression and so on, and the treatments are different according to the causes of the disease. 1. Tracheal spasm: If it is caused by tracheal spasm, you can take drugs such as aminophylline, but you should pay attention to the guidance of the doctor and take the right amount, so as to avoid nausea, vomiting, rapid heartbeat and other adverse reactions. 2. Obstructive pneumonia: If it is caused by obstructive pneumonia, sensitive antibiotics should be used to control it, such as cephalosporins, streptomycin, tetracycline and so on. 3. Pleural effusion compression: if the patient is caused by a large amount of pleural effusion compressing lung tissue, the effusion can be properly drained and gradually relieved. For those who are breathing more than 40 in the advanced stage of lung cancer, it is recommended to go to hospital for symptomatic treatment in time to reduce the pain of patients, and the medicines should be taken in strict accordance with the doctor’s prescription.