Entaliv 0.5 mg is a prescription medication used in the treatment of chronic hepatitis B virus (HBV) infection in adults. Each Entaliv tablet contains 0.5 mg of the active ingredient entecavir, which works by slowing the growth of the virus in the body. This medication is typically taken once daily on an empty stomach, at least 2 hours before or after a meal, to help maximize its effectiveness.