Enfavirtide

It is fusion inhibitor, used in HIV.
It is an antiretroviral drug(for HIV/HTLV-3 virus)
It act by binding to HIV-1 envelope glycoprotein (gp41) & prevent the fusion of viral & cellular membranes.
Entry of virus into cell is blocked.
It is not active against HIV-2.
It is given by s.c. route
It is used as add on drug.