Chronic hepatitis C prior treatment non-responder patients In study MV17150, patients who were non-responders to previous therapy with pegylated interferon alfa-2b plus ribavirin were randomized to four different treatments: • Pegasys 360 mcg/ week for 12 weeks, followed by 180 mcg/ week for a further 60 weeks • Pegasys 360 mcg/ week for 12 weeks, followed by 180 mcg/ week for a further 36 weeks • Pegasys 180 mcg/ week for 72 weeks • Pegasys 180 mcg/ week for 48 weeks All patients received ribavirin (1000 or 1200 mg/ day) in combination with Pegasys.