Conditions: Hepatitis C
Keywords: Hepatitis C TMC435 HCV Hep C Genotype 1
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 394
Healthy volunteers: no

Brief summary:
The purpose of this study is to investigate the effectiveness and safety of TMC435 compared with placebo in patients who are infected with genotype 1 hepatitis C virus who relapsed after previous interferon-based therapy. Patients will also receive peginterferon alfa-2a and ribavirin as part of their treatment.

Detailed description:
This is a randomized, double-blind (neither physician nor patients knows the name of the assigned drug), placebo-controlled study of TMC435 in patients who are infected with genotype 1 hepatitis C virus who relapsed after previous interferon-based therapy. Patients in this study will also receive two other drugs for their infection called peginterferon alfa-2a and ribavirin. The purpose of the study is to investigate if TMC435 is superior to placebo in reducing hepatitis C virus to an undetectable level 24 weeks after the end of treatment. For the first 12 weeks, patients will take TMC435 or placebo, plus peginterferon alfa-2a and ribavirin. For the next 12 weeks, patients will take peginterferon alfa-2a and ribavirin only. After that, some patients will continue to take peginterferon alfa-2a and ribavirin for up to 24 additional weeks. Other patients will stop taking peginterferon alfa-2a and ribavirin. The study doctor will inform each patient about how to take their study medication and when they should stop taking it. After a patient stops taking study medication, they will continue to come to the doctor's office for study visits until a total of 72 weeks after they enroll in the study. The total duration of the study is 78 weeks (including screening). Patients will be monitored for safety throughout the study. Study assessments at each study visit may include but are not limited to: blood and urine collection for testing, ECG assessments (a measurement of the electrical activity of your heart), patient questionnaires, and physical examinations TMC435 will be taken as an oral capsule of 150 mg once per day. Peginterferon (Pegasys ®) will be given as an injection of 180 µg once each week. Ribavirin (Copegus ®) will be taken as a tablet twice each day and the dose will depend on your body weight.

Arms:
arm 1: TMC435 150 mg capsule once daily for 12 weeks in addition to peginterferon alfa-2a and ribavirin for 24 or 48 weeks arm 2: Placebo 150 mg capsule once daily for 12 weeks in addition to peginterferon alfa-2a and ribavirin for 48 weeks

Interventions: intervention 1: TMC435 intervention 2: Placebo intervention 3: Peginterferon alpha-2a (PegIFN alpha-2a) intervention 4: Ribavirin (RBV)
Intervention descriptions: intervention 1: 150 mg capsule once daily for 12 weeks in addition to peginterferon alfa-2a and ribavirin for 24 or 48 weeks intervention 2: 150 mg capsule once daily for 12 weeks in addition to peginterferon alfa-2a and ribavirin for 48 weeks intervention 3: One subcutaneous (under the skin) injection containing 0.5 mL solution with 180 mcg PegIFN alpha-2a once weekly for up to 48 weeks. intervention 4: 200-mg tablets of RBV (body-weight adjusted dose) taken orally (by mouth) twice daily for up to 48 weeks.

Protocol document: