There is no definite time for how long you should take hepatitis B antiviral medication, it depends on when the criteria for stopping the medication have been met. The mechanism of action of most hepatitis B antiviral drugs is to inhibit the growth of the virus, not to kill the virus directly, so they need to be taken for a long time. Patients with good therapeutic effects stop taking the medication in three to five years, while those with poor results may take ten years or even longer, so the length of time to take the medication cannot be determined. If the DNA of hepatitis B virus turns negative, the patient’s liver function is normal, the surface antigen turns negative, and the surface antibody appears, only then can you stop taking the medication under the guidance of the doctor, do not stop taking the medication without authorization, so as not to aggravate the condition.