In the decompensated stage of cirrhosis, if it is caused by hepatitis B virus infection, it is useful to take antitoxic drugs; if not, it is ineffective to take antiviral drugs. In China, hepatitis B virus infection is still the main cause of cirrhosis and liver cancer. When the examination finds that the patient has hepatitis B virus and the clinical manifestation is cirrhosis in the decompensated stage, no matter what the titer of hepatitis B DNA is, antiviral drugs (e.g., entecavir) should be taken in order to prevent further progression of the disease or even liver failure. If cirrhosis is not caused by hepatitis B virus infection, but by alcohol, fatty liver, etc., antiviral drugs are ineffective, and alcohol cessation and low-fat diet are needed. Whether or not you need to take antiviral drugs in the decompensated stage of cirrhosis requires clarification of the cause of cirrhosis, and then the next step in the treatment program. Seek medical attention in time and cooperate with doctors for treatment.