0.5mg Entecavir Tablets are an antiviral drug. It inhibits DNA replication, reverse transcription and transcription in the process of viral replication. Entecavir reduces the number of hepatitis B virus in the bloodstream by inhibiting its ability to multiply and thus infect other cells. The typical dose is 0.5 mg to 1 mg once a day on an empty stomach. Children aged 2 and older: The dose is based on the child's weight, but will never be more than 1 mg a day. The 0.5mg Entecavir Tablets are very effective and can be used in the treatment of various ailments.