Study of Vaniprevir Plus PegIntron®/Ribavirin in Japanese Participants With Chronic Hepatitis C Who Relapsed After Treatment (MK-7009-044)

A Phase III Study to Evaluate the Safety, Tolerability, and Efficacy of MK-7009 When Concomitantly Administered With Peginterferon Alfa-2b and Ribavirin in Japanese Patients With Chronic Hepatitis C Infection Who Relapsed After Previous Treatment

The purpose of this study is to evaluate the safety, tolerability, and efficacy of vaniprevir given in combination with pegylated interferon alfa-2b (PegIntron®/peg-IFN) and ribavirin (RBV) in chronic hepatitis C (CHC) Genotype I (GT 1) participants who relapsed after previous therapy with interferon-based therapy. The primary efficacy hypothesis is that the percentage of participants achieving sustained virologic response 24 weeks after completion of all study therapy (SVR24) in at least one of the vaniprevir 300 mg twice daily treatment regimens is greater than 20% (historical data of standard of care treatment).

Inclusion Criteria:

• Japanese participant diagnosed with compensated CHC GT 1
• Absence of ascites, bleeding esophageal varices, hepatic encephalopathy, or other signs or symptoms of advanced liver disease
• Has received and tolerated treatment with IFN-based therapy (IFN α, IFN β, or peg-IFN) with or without use of ribavirin, but failed to respond to the prior treatment (relapse or breakthrough)
• No evidence of cirrhosis

Exclusion Criteria:

• Co-infection with human immunodeficiency virus (HIV)
• Positive hepatitis B surface antigen or other evidence of active hepatitis B infection
• Any other condition that is contraindicated or for which caution is required for treatment with peg-IFN or RBV
• Any condition or pre-study laboratory abnormality, or history of any illness, that, in the opinion of the investigator, might confound the results of the study or pose additional risk in administering the study drugs, peg-IFN and RBV, to the participant