<unk>  is a protease inhibitor, co-administered with ritonavir that is FDA approved for the treatment of HIV-1 infected patients who are treatment-experienced and infected with HIV-1 strains resistant to more than one protease inhibitor. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include diarrhea, nausea, pyrexia, vomiting, fatigue, headache, and abdominal pain.
Tipranavir
Saquinavir
Abacavir
Entecavir
Fosamprenavir
Telaprevir
Darunavir
Enfuvirtide