In the two studies mentioned above, treatment with 10 mg adefovir dipivoxil was associated with significant reductions in serum HBV DNA (3.52 and 3.91 log10 copies/ ml, respectively, versus 0.55 and 1.35 log10 copies/ ml), increased proportion of patients with normalisation of ALT (48 and 72% versus 16 and 29%) or increased proportion of patients with serum HBV DNA below the limits of quantification (< 400 copies/ ml Roche Amplicor Monitor PCR assay) (21 and 51% versus 0%) when compared with placebo.