adefovir

noun

adef·​o·​vir ə-ˈde-fə-ˌvir 

variants or adefovir dipivoxil

-ˌdī-pə-ˈväk-səl 

: an antiviral drug that is taken orally in the form of its diester C₂₀H₃₂N₅O₈P in the treatment of hepatitis B

Adefovir is very effective in lamivudine-resistant HBV infection.

—Jules L. Dienstag, The New England Journal of Medicine

Current treatment options for chronic hepatitis include interferon, given by injection, and two drugs administered orally, lamivudine and adefovir dipivoxil.

—The Baltimore (Maryland) Sun

Note: Adefovir is a nucleotide analog acting against hepatitis B virus by inhibiting reverse transcriptase. It is marketed under the trademark Hepsera.