raltegravir

noun

ral·​teg·​ra·​vir ˌral-ˈteg-rə-ˌvir 

: an antiretroviral drug C₂₀H₂₀FKN₆O₅ that inhibits an enzyme necessary for viral replication and is administered orally typically with other antiretroviral drugs in the treatment of HIV infection

Note: Raltegravir is marketed under the trademark Isentress.