Conditions: Chronic Hepatitis C
Allocation: NON_RANDOMIZED | Intervention model: PARALLEL
Enrollment: 273
Healthy volunteers: no

Brief summary:
This study will evaluate the antiviral efficacy, safety, and tolerability of combination therapy with oral regimens for the treatment of chronic hepatitis C virus (HCV) infection.

Detailed description:

Arms:
arm 1: Participants who previously received ledipasvir/sofosbuvir (LDV/SOF) fixed-dose combination (FDC) plus ribavirin (RBV) for ≥ 12 weeks without achieving sustained virologic response at 12 weeks following treatment (SVR12) will receive LDV/SOF+RBV for 24 weeks. arm 2: Participants who previously received a sofosbuvir-based regimen without achieving SVR12 were initially enrolled to receive LDV/SOF+RBV for 12 weeks (excluding participants who previously received LDV/SOF+RBV for ≥ 12 weeks). Participants who did not achieve sustained virologic response at 12 weeks were then moved to Cohort 1 Group 1. arm 3: Participants with genotype 2 (GT2) HCV infection will receive LDV/SOF FDC for 12 weeks. arm 4: Participants with GT2 HCV infection will receive LDV/SOF FDC for 8 weeks. arm 5: Participants with genotypes 1 (GT1), 2 (GT2), or 4 (GT4) HCV infection and extrahepatic manifestations of chronic HCV infection will receive LDV/SOF FDC for 12 weeks. arm 6: Participants with genotype 3 (GT3) HCV infection and extrahepatic manifestations of chronic HCV infection will receive LDV/SOF FDC plus RBV for 12 weeks. arm 7: Treatment-naive participants with GT1 HCV infection without cirrhosis will receive VOX only on Day 1 followed by sofosbuvir/velpatasvir (SOF/VEL) + voxilaprevir (VOX) for 6 weeks. arm 8: Treatment-naive participants with GT1 HCV infection without cirrhosis will receive SOF/VEL+VOX for 4 weeks. arm 9: Treatment-naive participants with GT1 HCV infection with cirrhosis will receive SOF/VEL+VOX for 6 weeks. arm 10: Treatment-naive participants with GT3 HCV infection with cirrhosis will receive SOF/VEL+VOX for 6 weeks. arm 11: Treatment-experienced participants with GT1 HCV infection with cirrhosis who were previously treated with pegylated interferon (Peg-IFN)+RBV will receive SOF/VEL+VOX for 6 weeks. arm 12: Treatment-experienced participants with GT3 HCV infection with cirrhosis who were previously treated with Peg-IFN+RBV will receive SOF/VEL+VOX for 6 weeks. arm 13: Treatment-experienced participants with GT1 HCV infection with or without cirrhosis who were previously treated with non-structural protein (NS3/4A) protease inhibitor (PI) will receive SOF/VEL+VOX for 6 weeks. arm 14: Treatment-experienced participants with GT1 HCV infection with or without cirrhosis who were previously treated with direct-acting antivirals (DAA) will receive SOF/VEL+VOX for 6 weeks. arm 15: Treatment-experienced participants with GT3 HCV infection with or without cirrhosis who were previously treated with DAA will receive SOF/VEL+VOX for 8 weeks.

Interventions: intervention 1: LDV/SOF intervention 2: RBV intervention 3: SOF/VEL intervention 4: VOX
Intervention descriptions: intervention 1: 90/400 mg FDC tablet administered orally once daily intervention 2: Tablets administered orally in a divided daily dose according to package insert weight-based dosing recommendations (\< 75 kg = 1000 mg and ≥ 75 kg = 1200 mg) intervention 3: 400/100 mg FDC tablet administered orally once daily intervention 4: 100 mg tablet administered orally once daily with food

Protocol document: