Peginterferon a-2b was used in eight patients (67%), while peginterferon a-2a was used in four patients (33%). Consensus interferon (Infergen, 9 lg q.d.) was given in a single case. Dosage regimes varied from 100 to 180 lg/week, depending on type of peginterferon, and from 400 to 1,200 mg/day for ribavirin. In two cases Amantadine was added to the treatment regimen.