Dataset from KALETRA Or LEXIVA With Ritonavir Combined With EPIVIR And Abacavir In Naive Subjects Over 48 Weeks

This study will compare the ability of fosamprenavir 700 mg with ritonavir 100 mg twice a day or lopinavir 400 mg with ritonavir 100 mg twice a day both combined with a fixed dose combination tablet of abacavir 600 mg and lamivudine 300 mg once a day to suppress virus levels of HIV to less than 400 copies/mL of blood. In addition we will study the safety and tolerability of these compounds over the 48 week study period in patients naive to anti-HIV therapy.