Completed

Randomized, Multicenter, Double-blind, Phase IV Pilot Study Evaluating the Effect of PEGASYS Doses of 180 ug or 270 ug in Combination With Copegus Doses of 1200 mg or 1600 mg on Viral Kinetics, Virological Response, Pharmacokinetics, and Safety in Interferon-naïve Patients With Chronic Hepatitis C Genotype 1 Virus Infection of High Viral Titer and Body Weight Greater Than 85 kg

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What is being tested

ribavirin [Copegus]

+ peginterferon alfa-2a (PEG-IFN alfa-2a) [Pegasys]

Drug
Who is being recruted

Blood-Borne Infections+16

+ Chronic Disease

+ Communicable Diseases

Over 18 Years
See all eligibility criteria
How is the trial designed

Treatment Study

Phase 4
Interventional
Study Start: January 2004
See protocol details

Summary

Principal SponsorHoffmann-La Roche
Last updated: January 14, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: January 1, 2004

Actual date on which the first participant was enrolled.

The effects of treatment with different doses of PEGASYS in combination with different doses of ribavirin will be evaluated in patients with CHC genotype 1 who have a high viral titer, body weight greater than 85kg (187lbs) and no prior treatment with interferon. The anticipated time on study treatment is 3-12 months and the target sample size is 100-500 individuals.

Official TitleRandomized, Multicenter, Double-blind, Phase IV Pilot Study Evaluating the Effect of PEGASYS Doses of 180 ug or 270 ug in Combination With Copegus Doses of 1200 mg or 1600 mg on Viral Kinetics, Virological Response, Pharmacokinetics, and Safety in Interferon-naïve Patients With Chronic Hepatitis C Genotype 1 Virus Infection of High Viral Titer and Body Weight Greater Than 85 kg 
NCT00077649
Principal SponsorHoffmann-La Roche
Last updated: January 14, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

188 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.

Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

Over 18 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Blood-Borne InfectionsChronic DiseaseCommunicable DiseasesDigestive System DiseasesEnterovirus InfectionsHepatitisHepatitis AHepatitis, ChronicHepatitis, Viral, HumanHepatitis CInfectionsLiver DiseasesPathologic ProcessesPicornaviridae InfectionsRNA Virus InfectionsVirus DiseasesFlaviviridae InfectionsHepatitis C, ChronicDisease Attributes

Criteria

Inclusion Criteria: * adult patients \>=18 years of age; * body weight \>85kg (187lbs); * CHC (genotype 1); * liver biopsy (in \<24 calendar months of first dose), with results consistent with CHC infection; * use of 2 forms of contraception during study and 6 months after the study in both men and women. Exclusion Criteria: * women who are pregnant or breastfeeding; * male partners of women who are pregnant; * conditions associated with decompensated liver disease; * other forms of liver disease, including liver cancer; * human immunodeficiency virus infection; * previous treatment with an interferon, ribavirin, viramidine, levovirin or amantadine.

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

4 intervention groups are designated in this study

This study does not include a placebo group 

Treatment Groups

Group I

Active Comparator
Participants received 180 μg of PEG-IFN \[peginterferon\] alfa-2a in 1 mL solution administered \[subcutaneously\] sc, once weekly + 1200 mg of ribavirin (200 mg/tablet) + ribavirin placebo (2 tablets) administered \[orally \] po daily in split doses for 48 weeks

Group II

Experimental
Participants received 270 μg of PEG-IFN alfa-2a in 1-mL solution administered sc once weekly + 1200 mg of ribavirin (200 mg/tablet) + ribavirin placebo (2 tablets) administered po daily in split doses for 48 weeks

Group III

Experimental
Participants received 180 μg of PEG-IFN \[peginterferon\] alfa-2a in 1 mL solution administered \[subcutaneously\] sc, once weekly + 1200 mg of ribavirin (200 mg/tablet) + ribavirin placebo (2 tablets) administered \[orally \] po daily in split doses for 48 weeks

Group IV

Experimental
Participants received 270 μg of PEG-IFN alfa-2a in 1-mL solution administered sc once weekly + 1600 mg of ribavirin (200 mg/tablet) administered po daily in split doses for 48 weeks.

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

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CompletedNo study centers