Passage: Entecavir (ETV), sold under the brand name Baraclude, is an antiviral medication used in the treatment of hepatitis B virus (HBV) infection. In those with both HIV/AIDS and HBV antiretroviral medication should also be used. Entecavir is taken by mouth as a tablet or solution.Common side effects include headache, nausea, high blood sugar, and decreased kidney function. Severe side effects include enlargement of the liver, high blood lactate levels, and liver inflammation if the medication is stopped. While there appears to be no harm from use during pregnancy, this use has not been well studied. Entecavir is in the nucleoside reverse transcriptase inhibitors (NRTIs) family of medications. It prevents the hepatitis B virus from multiplying by blocking reverse transcriptase.Entecavir was approved for medical use in 2005. It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system. In the United States as of 2015 it is not available as a generic medication. The wholesale price is about US$392 for a typical month supply as of 2016 in the United States.

Question: What is the name of the drug used to treat HBV infection?
Baraclude