Following multiple dose oral administration of emtricitabine to 20 HIV infected patients, steady-state Cmax was 1.8 ± 0.7 µg/ ml (mean ± S. D.) (39%CV), steady-state Cmin was 0.09 ± 0.07 µg/ ml (80%) and the AUC was 10.0 ± 3.1 µg• h/ ml (31%) over a 24 hour dosing interval.