This study is being conducted to provide open-label APV to patients in danger of HIV disease progression, as well as those who may benefit beyond the expected outcomes of current anti-retroviral therapies. Despite unapproved status, APV may prove highly efficacious in combatting HIV progression and may help those in need, prior to regulatory approval.~Patients are stratified into one of the following treatment options:~Non-nucleoside reverse transcriptase inhibitor (NNRTI)-naive:~Option 1- APV / ABC / PI / NNRTI / +nucleoside reverse transcriptase inhibitor(s) (NRTI) Option 2- APV / ABC / NNRTI / NRTI(s)~NNRTI-Experienced Patients:~Option 1- APV / ABC / PI / +NRTI(s) Option 2- APV / ABC / +NRTI(s) To assess clinical efficacy, lab values (i.e., hematology, serum chemistry, plasma HIV-1 viral load determination and CD4+ cell count measurements) are collected at pre-entry and every 12 weeks thereafter.
To assess the safety, tolerance, and efficacy of amprenavir (APV) plus abacavir (ABC) in patients who have previously failed antiretroviral treatment containing a protease inhibitor (PI). To provide open-label, pre-approval access to APV for adults and adolescents with HIV-1 infection and limited treatment options.~This study is being conducted to provide open-label APV to patients in danger of HIV disease progression, as well as those who may benefit beyond the expected outcomes of current anti-retroviral therapies. Despite unapproved status, APV may prove highly efficacious in combatting HIV progression and may help those in need, prior to regulatory approval.