ENTEHEP 1MG TABLET is used to treat chronic hepatitis B virus (HBV) infection. Hepatitis B is a severe liver infection caused by the hepatitis B virus (HBV). It is highly contagious (spreads from one person to another) and spreads through intimate contact with the infected person, direct contact with infected blood, being pricked with a contaminated needle, using a razor or any other personal items with leftovers of infected fluid or even transfer from mother to baby during birth.