For people taking entecavir, it is generally recommended that they be retested once every 1 to 2 months. Entecavir is an antiviral drug used to treat hepatitis B. It can inhibit the replication of hepatitis B virus. After treatment with entecavir, it is necessary to insist on review, and it is recommended to review once every 1~2 months, to clarify whether the drug brings obvious adverse reactions, as well as the replication of the virus and other conditions. The adverse reactions of entecavir include: digestive reactions (nausea, vomiting, dyspepsia, etc.), dizziness, headache, thrombocytopenia, elevated alanine aminotransferase and glutamine aminotransferase, and elevated blood glucose. Contraindications are: hypersensitivity to the product, lactating women, women during pregnancy, patients with renal insufficiency, etc. After taking entecavir, you should follow the doctor’s instructions to review, in order to help clarify the late development of the disease in time.