Tipranavir forbliver signifikant, antiviralt (< 4 gange resistens) over for størstedelen af HIV- 1- kliniske isolater, som udviser nedsat følsomhed over for de godkendte proteasehæmmere: amprenavir, atazanavir, indinavir, lopinavir, ritonavir, nelfinavir og saquinavir.
Tipranavir maintains significant antiviral activity (< 4-fold resistance) against the majority of HIV-1 clinical isolates showing post-treatment decreased susceptibility to the currently approved protease inhibitors: amprenavir, atazanavir, indinavir, lopinavir, ritonavir, nelfinavir and saquinavir.