Common causes of lethargy and dizziness in advanced stage of liver cancer include hepatic encephalopathy, physical weakness and decline of liver function, etc. Medications and nutritional measures can be taken. 1. Hepatic encephalopathy: Hepatic encephalopathy, also known as hepatic coma, mainly manifests as consciousness disorder, behavioral disorder, lethargy and dizziness, etc. Lactulose can be used to reduce the production and absorption of ammonia in the intestinal tract, and glutamic acid can be used to promote the metabolism of ammonia in the body. 2. Weakness: In advanced stage of liver cancer, the body is generally weak, and there will be extreme fatigue, weakness and malnutrition, which will lead to the symptoms of fatigue, lethargy and blurred vision, so the patient can eat more light diets with high protein to replenish nutrients. 3. Decline in liver function: metabolism and detoxification function of liver in advanced stage of liver cancer will decline, which will easily induce hepatic coma. According to the cause of liver cancer, strengthen nutrition, supportive treatment or anti-hepatic coma and liver-protective treatment can be given. All the above medications and treatments should be carried out under the guidance of doctors. Drowsiness and blurred eyes in advanced stage of liver cancer may also be caused by other reasons, so one should go to the hospital in time to find out the causes and carry out treatment.