Tenofovir disoproxil fumarate tablets generally need to be taken for a long period of time, patients who need antiviral treatment often need long-term anti-hepatitis B virus treatment, and can not stop taking the drug without authorization, so as to avoid the adverse consequences of viral replication rebound and liver damage. Tenofovir disoproxil fumarate is mainly used for the treatment of chronic hepatitis B. It acts on the reverse transcriptase of hepatitis B virus to terminate the replication of the viral DNA chain, so as to achieve the effect of inhibiting the replication of hepatitis B virus. Patients with hepatitis B who are clinically indicated for antiviral therapy need to take the drug for a long period of time to inhibit viral replication, slow down the progression of the disease, and avoid the occurrence of cirrhosis. Note that this drug should not be taken by patients who are allergic to this drug, and may cause adverse reactions in the digestive tract, or headache, dizziness, increased transaminase levels. Oral administration of this drug is recommended under the guidance of an infectious disease physician or a licensed pharmacist in a regular hospital, and should not be taken on its own.