After multiple dose oral administration of fosamprenavir 700 mg with ritonavir 100 mg twice daily, amprenavir was rapidly absorbed with a geometric mean (95% CI) steady state peak plasma amprenavir concentration (Cmax) of 6.08 (5.38-6.86) µg/ ml occurring approximately 1.5 (0.75-5.0) hours after dosing (tmax).