Amprenavir inhibits the HIV viral proteinase enzyme which prevents cleavage of the gag-pol polyprotein, resulting in noninfectious, immature viral particles. (en)
Take with or without food, however avoid lipid-rich meals. (en)
Vitamin E increases amprenavir bioavailability. (en)
Avoid alcohol, especially with the oral solution since it contains propylene glycol which competes with alcohol for alcohol dehydrogenase metabolism. (en)
Rapidly absorbed after oral administration in HIV-1-infected patients with a time to peak concentration (T<sub>max</sub>) typically between 1 and 2 hours after a single oral dose. The absolute oral bioavailability of amprenavir in humans has not been established. (en)