Cùng với nhau, chúng là 2 loài duy nhất còn lại của họ Monodontidae (đôi khi còn gọi là họ Cá voi trắng).
Hepsera is used to treat adult patients with chronic (long-term) hepatitis B (a disease of theliver due to infection with the hepatitis B virus).It is used in patients with: compensated liver disease (when the liver is damaged but functions normally), who also show signs that the virus is still multiplying, and have signs of liver damage (raised levels of the liver enzyme alanine aminotransferase [ ALT ] and signs of damage when liver tissue is examined under a microscope); decompensated liver disease (when the liver is damaged and does not function normallyWikiMatrix WikiMatrix