atazanavir, dosed ↔ 1.03 ↑ 1.12 ↔ 1.03 1 hr after ddI+d4T (0.64, 1.67) (0.67, 1.18) (0.61, 1.73) (fasted) Atazanavir concentrations were greatly decreased when co-administered with didanosine (buffered tablets) and stavudine.