Entecavir is a new generation of drugs for the treatment of hepatitis B. Adverse reactions include dizziness, vertigo and other symptoms, which generally do not lead to symptoms of phosphorus deficiency in the body, and it is recommended that entecavir be taken under the guidance of a doctor. Entecavir is a new generation of drugs for the treatment of hepatitis B. It is a guanine nucleotide analog. It reduces the level of hepatitis B virus in the body by inhibiting its replication, and is mainly used for the treatment of chronic hepatitis B with active viral replication and persistent elevation of serum aminotransferase and alanine aminotransferase. Clinical studies have shown that the common adverse effects of taking entecavir are dizziness, vertigo, nausea, etc. The adverse effects are mainly concentrated in the gastrointestinal tract and the nervous system, and for the time being, there is no indication that taking entecavir causes phosphorus deficiency. Entecavir is a new drug for the treatment of hepatitis B. It does not cause symptoms of phosphorus deficiency, and it is recommended that entecavir be taken under the supervision of a doctor.