<unk>  is an antiretroviral of the protease inhibitor class. It is used against HIV infections as a fixed-dose combination with another protease inhibitor, ritonavir<unk> /ritonavir). It was patented in 1995 and approved for medical use in 2000.
Lopinavir
Saquinavir
Ritonavir
Nelfinavir
Amprenavir
Indinavir
Entecavir
Fosamprenavir