In antiretroviral naïve patients in APV30002, fosamprenavir (1400 mg) given once daily in combination with low dose ritonavir (200 mg) as part of a triple regimen including abacavir (300 mg twice daily) and lamivudine (150 mg twice daily) showed similar efficacy over 48 weeks compared to nelfinavir (1250 mg) given twice daily in combination with abacavir with lamivudine (300 and 150 mg twice daily).