Smoking is not recommended after taking entecavir. Entecavir is a medication for the treatment of hepatitis B. It is used to treat hepatitis B by inhibiting the replication of the hepatitis B virus. It is mainly used to treat hepatitis B by inhibiting the replication of hepatitis B virus, reducing the number of hepatitis B virus and decreasing the damage of hepatitis B virus to the liver. As a large amount of nicotine and other harmful substances enter the body after smoking, they are mainly metabolized through the liver, and also easily damage the liver cells. Hepatitis B virus will attack liver cells, so it is not recommended for hepatitis B patients to smoke after taking drugs such as entecavir for treatment, otherwise it may aggravate liver damage, worsen the condition of hepatitis B, and affect the treatment effect. Long-term smoking may induce hepatitis and gradually develop into cirrhosis. One should quit smoking in time for systematic treatment in order to effectively treat hepatitis B. Hepatitis B patients should go to the hospital and take medication and treatment under the guidance of the doctor and with the specific conditions of the individual.