Conditions: Hepatitis C
Keywords: Hepatitis C Peginterferon alpha-2a PegIFNalpha-2a RBV Ribavirin Placebo TMC435-TIDP16-C206 TMC435-C206 TMC435 HCV
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 463
Healthy volunteers: no

Brief summary:
The purpose of this study is to determine the efficacy, safety and tolerability of different regimens of TMC435 with standard treatment compared to standard treatment alone in participants with chronic, genotype 1, hepatitis C virus (HCV) infection who has failed previous treatment with pegylated interferon (Peg-INF-alfa-2a) and ribavirin (RBV).

Detailed description:
The study is a randomized (study drug assigned by chance), double-blind (neither physician nor participant knows the name of the assigned drug), placebo-controlled Phase IIb trial with TMC435 in participants with chronic, genotype 1, hepatitis C virus (HCV) infection who have failed standard treatment with pegylated interferon (Peg-INF-alfa-2a) and ribavirin (RBV). The study will compare the efficacy, tolerability and safety of different regimens with TMC435 combined with standard treatment (Peg-INF-alfa-2a and RBV) versus standard treatment alone. The trial will consist of a screening period of maximum 6 weeks, a 48-week treatment period, and a 24-week follow-up period. Participants will be eligible to enroll in the trial if they failed to respond to a prior course of standard treatment or relapsed following standard treatment. Participants will be randomly assigned to receive TMC435 with standard treatment for 12 weeks followed by standard treatment (plus placebo) for 36 weeks, TMC435 (100 mg or 150 mg once a day) with standard treatment for 24 weeks followed by standard treatment (plus placebo) for 24 weeks, TMC435 (100 mg or 150 mg once a day) with standard treatment for 48 weeks, or a placebo with standard treatment for 48 weeks.

Arms:
arm 1: Participants will receive TMC435 100 mg once daily with Peg-IFN-alfa-2a (P) once weekly and ribavirin (R) twice daily for 12 weeks followed by Placebo with PR for 36 weeks. arm 2: Participants willl receive TMC435 100 mg once daily with Peg-IFN-alfa-2a (P) once weekly and ribavirin (R) twice daily for 24 weeks followed by Placebo with PR for 24 weeks. arm 3: Participants will receive TMC435 100 mg once daily with Peg-IFN-alfa-2a (P) once weekly and ribavirin (R) twice daily for 48 weeks. arm 4: Participants will receive TMC435 150 mg once daily with Peg-IFN-alfa-2a (P) once weekly and ribavirin (R) twice daily for 12 weeks followed by Placebo and PR for 36 weeks. arm 5: Participants will receive TMC435 150 mg once daily with Peg-IFN-alfa-2a (P) once weekly and ribavirin (R) twice daily for 24 weeks followed Placebo and PR for 24 weeks. arm 6: Participants will receive TMC435 150 mg once daily with Peg-IFN-alfa-2a (P) once weekly and ribavirin (R) twice daily for 48 weeks. arm 7: Participants will receive Placebo once daily with Peg-IFN-alfa-2a (P) once weekly and ribavirin (R) twice daily for 48 weeks.

Interventions: intervention 1: TMC435 intervention 2: Placebo intervention 3: Peg-IFN-alfa-2a (P) intervention 4: Ribavirin (R)
Intervention descriptions: intervention 1: One TMC435 100-mg capsule or two 75-mg capsules orally (by mouth) once daily for 12, 24, or 48 weeks. intervention 2: One or 2 capsules of placebo identical in appearance to TMC435 taken orally once daily for 24, 36, or 48 weeks. intervention 3: 180 micrograms taken as one 0.5 mL subcutaneous injection once weekly for 48 weeks. intervention 4: 1000 or 1200 mg/day (5 or 6 tablets) taken orally as a twice daily regimen taken for 48 weeks.

Protocol document: