Tipranavir- resistente vira, som frembringes in vitro ud fra vildtype HIV- 1, viser nedsat følsomhed over for proteasehæmmerne amprenavir, atazanavir, indinavir, lopinavir, nelfinavir og ritonavir, men forbliver følsomme over for saquinavir.
Tipranavir resistant viruses which emerge in vitro from wild-type HIV-1 show decreased susceptibility to the protease inhibitors amprenavir, atazanavir, indinavir, lopinavir, nelfinavir and ritonavir but remain sensitive to saquinavir.