Ved afprøvning for aktivitet mod laboratoriestammer af HBV lå koncentrationen af emtricitabin for 50% hæmning (IC50) inden for området 0, 01- 0, 04 µmol/ l.
19 When tested for activity against laboratory strains of HBV, the 50% inhibitory concentration (IC50) value for emtricitabine was in the range of 0.01 to 0.04 µmol/ l.