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Hepatitis C

Part of Hepatitis

21 published articles · Updated continuously

Clinical Trial Landscape

Clinical Trials for Hepatitis C

319 trials tracked for Hepatitis C: 128 in phase 3 or 4 and 55 with published results. The most-cited published study has 1126 citations.

319Trials tracked
128Phase 3 & 4
0Recruiting
55With published results
Phase distribution
Phase 4 32 Phase 3 96 Phase 2 98 Phase 1 29 Other / NA 64
  1. Phase 4 Immunologic Effects of HCV Therapy With HARVONI in HCV Genotype 1 Chronically Mono-infected Active and Former IDUs Completed · 1,126 cited
  2. Phase 3 Sofosbuvir/Velpatasvir Fixed Dose Combination for 12 Weeks in Adults With Chronic HCV Infection Completed · 1,117 cited
  3. Phase 3 Comparison of Sofosbuvir/Velpatasvir Fixed Dose Combination for 12 Weeks With Sofosbuvir and Ribavirin for 12 Weeks in Adults With Chronic Genotype 2 HCV Infection Completed · 853 cited
  4. Phase 3 Comparison of Sofosbuvir/Velpatasvir Fixed Dose Combination for 12 Weeks With Sofosbuvir and Ribavirin for 24 Weeks in Adults With Chronic Genotype 3 HCV Infection Completed · 851 cited
  5. Phase 3 Sofosbuvir/Velpatasvir Fixed-Dose Combination in Adults With Chronic HCV Infection and Child-Pugh Class B Cirrhosis Completed · 809 cited
  6. Phase 3 Safety and Efficacy of Grazoprevir (MK-5172) + Elbasvir (MK-8742) in Participants With Chronic Hepatitis C and Chronic Kidney Disease (MK-5172-052) Completed · 670 cited
Show 44 more trials
  1. Phase 3 Safety and Efficacy of Sofosbuvir/Velpatasvir/Voxilaprevir in Adults With Chronic HCV Infection Who Have Previously Received Treatment With Direct-Acting Antiviral Therapy Completed · 566 cited
  2. Phase 3 Safety and Efficacy of SOF/VEL/VOX FDC for 12 Weeks and SOF/VEL for 12 Weeks in DAA-Experienced Adults With Chronic HCV Infection Who Have Not Received an NS5A Inhibitor Completed · 566 cited
  3. Phase 3 Efficacy and Safety of Ledipasvir/Sofosbuvir Fixed-Dose Combination for 12 Weeks in Subjects With Chronic Genotype 1 or 4 HCV and HIV-1 Co-infection Completed · 469 cited
  4. Phase 4 Hepatitis C Treatment in PWIDs: MAT or Syringe Exchange Assisted-therapy vs Standard of Care Completed · 313 cited
  5. Phase 3 A Multipart, Open-label Study to Evaluate the Safety and Efficacy of ABT-450/r/ABT-267 With and Without ABT-333 Coadministered With and Without Ribavirin in Adult With Genotype 1 or 4 Hepatitis C Virus (HCV) Infection and Human Immunodeficiency Virus, Type 1 Coinfection Completed · 305 cited
  6. Phase 4 Exploring Renal Transplants Using Hepatitis C Infected Donors for HCV-negative Recipients Completed · 296 cited
  7. Phase 3 Ombitasvir/ABT-450/Ritonavir and Dasabuvir With or Without Ribavirin in HCV Genotype 1-Infected Adults With Chronic Kidney Disease Completed · 278 cited
  8. Phase 3 Safety and Efficacy of Sofosbuvir/Velpatasvir/Voxilaprevir and Sofosbuvir/Velpatasvir in Adults With Chronic HCV Infection Who Have Not Previously Received Treatment With Direct-Acting Antiviral Therapy Completed · 239 cited
  9. Phase 3 Safety and Efficacy of SOF/VEL/VOX FDC for 8 Weeks and SOF/VEL for 12 Weeks in Adults Chronic Genotype 3 HCV Infection and Cirrhosis Completed · 239 cited
  10. Phase 3 A Study to Evaluate the Efficacy, Safety, and Pharmacokinetics of Co-Administration of ABT-493 and ABT-530 With and Without RBV in Subjects With Chronic Hepatitis C Virus (HCV) Genotypes 2, 3, 4, 5 or 6 Infection Completed · 231 cited
  11. Phase 3 A Study to Evaluate the Efficacy, Safety, and Pharmacokinetics of ABT-493 and ABT-530 With and Without Ribavirin in Adults With HCV Who Failed a Prior DAA Containing Therapy Completed · 203 cited
  12. Phase 3 Efficacy and Safety Study of Simeprevir in Combination With Sofosbuvir in Participants With Chronic Hepatitis C Virus Infection Without Cirrhosis Completed · 189 cited
  13. Phase 3 A Study to Evaluate the Safety and Efficacy of ABT-493/ABT-530 in Adult Post-Liver or Post-Renal Transplant Recipients With Chronic Hepatitis C Virus (MAGELLAN-2) Completed · 182 cited
  14. Phase 3 Efficacy and Safety of Sofosbuvir/Velpatasvir Fixed Dose Combination for 12 Weeks in Adults With Chronic Hepatitis C Virus (HCV) and Human Immunodeficiency Virus (HIV)-1 Coinfection Completed · 161 cited
  15. Phase 3 Phase 3 Efficacy and Safety Study of Peginterferon Lambda-1a and Ribavirin With Telaprevir Completed · 151 cited
  16. Phase 3 A Study to Evaluate the Efficacy and Safety of Experimental Drugs ABT- 493/ABT-530 in Adults With Chronic Hepatitis C Virus Genotype 1-6 Infection and Human Immunodeficiency Virus -1 Coinfection (EXPEDITION-2) Completed · 147 cited
  17. Phase 3 Efficacy and Safety of Sofosbuvir/Velpatasvir Fixed Dose Combination for 12 Weeks in Participants With Chronic HCV Completed · 120 cited
  18. Phase 3 Safety and Efficacy of Ledipasvir/Sofosbuvir Fixed-Dose Combination in Adults With Chronic HCV and HBV Coinfection Completed · 118 cited
  19. Phase 3 A Study to Evaluate the Efficacy and Safety of ABT-493/ABT-530 in Japanese Adults With Genotype 2 Chronic Hepatitis C Virus Infection Completed · 113 cited
  20. Phase 3 A Study to Evaluate the Efficacy and Safety of ABT-493/ABT-530 in Japanese Adults With Chronic Hepatitis C Virus Infection Completed · 113 cited
  21. Phase 4 Monitoring SOF/VEL in Treatment Naïve, HCV Participants With Active Infection Completed · 109 cited
  22. Phase 3 Study of Grazoprevir (MK-5172) and Elbasvir (MK-8742) in Japanese Participants With Chronic Hepatitis C (MK-5172-058) Completed · 77 cited
  23. Phase 3 Grazoprevir (MK-5172) and Elbasvir (MK-8742) Combination for Chronic Hepatitis C Virus (HCV) Genotypes 1, 4, and 6 (MK-5172-065) Completed · 75 cited
  24. Phase 3 Efficacy and Safety of Glecaprevir (ABT-493)/Pibrentasvir (ABT 530) (GLE/PIB) in Combination With Sofosbuvir and Ribavirin in Participants With Hepatitis C Virus Who Did Not Respond to Treatment in a Previous AbbVie Clinical Study Completed · 74 cited
  25. Phase 3 Efficacy and Safety of Combination Grazoprevir (MK-5172)/Elbasvir (MK-8742) Versus Sofosbuvir + Pegylated Interferon + Ribavirin in Hepatitis C Virus Genotype 1, 4 or 6 Infection (MK-5172-077) Completed · 54 cited
  26. Phase 3 A Randomized, Open-Label Study to Evaluate the Safety and Efficacy of Ombitasvir/ABT-450/Ritonavir Co-administered With Ribavirin (RBV) in Adults With Genotype 4 Chronic Hepatitis C Virus (HCV) Infection and Cirrhosis (AGATE-1) Completed · 53 cited
  27. Phase 3 A Study to Evaluate Ombitasvir/Paritaprevir/Ritonavir and Dasabuvir in Treatment-Naïve Hepatitis C Virus Genotype 1b-Infected Adults Completed · 50 cited
  28. Phase 4 Kidney Transplants in Hepatitis C Negative Recipients With Hepatitis C Viremic Donors Completed · 49 cited
  29. Phase 3 Safety and Efficacy of Ledipasvir/Sofosbuvir Fixed Dose Combination, With or Without Ribavirin, in Egyptian Adults With Chronic Genotype 4 HCV Infection Completed · 49 cited
  30. Phase 3 Randomised Study of Interferon-free Treatment for Recently Acquired Hepatitis C in PWID and People With HIV Coinfection. Completed · 49 cited
  31. Phase 3 Grazoprevir (MK-5172) and Elbasvir (MK-8742) Combination in Treatment-Naïve Hepatitis C Virus Participants (MK-5172-067) Completed · 46 cited
  32. Phase 3 Multi-Center, Randomized, Open-Label Study of G/P +/- RBV for NS5A + SOF Previously Treated GT1 HCV Subjects Completed · 43 cited
  33. Phase 3 Dutch Acute HCV in HIV Study (DAHHS-2): Grazoprevir/Elbasvir for Acute HCV Completed · 43 cited
  34. Phase 4 Interferon Alfa Sensitivity in HIV/HCV Persons Before and After HIV Meds Completed · 42 cited
  35. Phase 3 A Study to Evaluate the Efficacy and Safety of ABT-493/ABT-530 in Subjects With Genotype 1 Infection Completed · 39 cited
  36. Phase 3 A Study Comparing Efficacy and Safety of ABT-493/ABT-530 to Sofosbuvir Dosed With Daclatasvir in Adults With HCV Genotype 3 Infection Completed · 39 cited
  37. Phase 3 A Study to Evaluate the Efficacy and Safety of ABT-493/ABT-530 in Adults With Chronic Hepatitis C Virus Genotype 1, 2, 4, 5 or 6 Infection and Compensated Cirrhosis Completed · 39 cited
  38. Phase 3 The Efficacy and Safety of ABT-493/ABT-530 in Adults With Chronic Hepatitis C Virus Genotype 4, 5, or 6 Infection (ENDURANCE-4) Completed · 39 cited
  39. Phase 4 Concentration-Controlled Ribavirin for the Treatment of Patients With Chronic Hepatitis C Virus Infection Completed · 34 cited
  40. Phase 4 Efficacy and Safety of Sofosbuvir+Ribavirin in Genotype 2 HCV-infected U.S. Veterans With Cirrhosis Completed · 27 cited
  41. Phase 4 Multi-center Study to Transplant Hepatitis-C Infected Kidneys Completed · 20 cited
  42. Phase 3 Study to Evaluate the Efficacy and Safety of ABT-450/Ritonavir/ABT- 267 (ABT-450/r/ABT-267) in Japanese Adults With Genotype 2 Chronic Hepatitis C Virus (HCV) Infection Completed · 15 cited
  43. Phase 3 Study to Investigate the Efficacy and Safety of Sofosbuvir/Velpatasvir Fixed-Dose Combination for 12 Weeks in Adults With Chronic HCV Infection and Compensated Cirrhosis Completed · 15 cited
  44. Phase 3 Efficacy and Safety of Sofosbuvir/Velpatasvir Fixed-Dose Combination in Participants With Chronic Hepatitis C Virus Infection Completed · 15 cited

Showing the 50 most-cited and recently-updated of 319 trials. Browse the full registry →

Trial data sourced from ClinicalTrials.gov. Counts describe the research landscape and are not a treatment recommendation. Informational only — not medical advice.

What the trials found Updated — new results For clinicians

Hepatitis C: what the trials found

Sofosbuvir-based regimens demonstrate high efficacy in treating Hepatitis C. Specifically, sofosbuvir/velpatasvir (SOF/VEL) achieved a 95% SVR12 rate with low rates of serious adverse events (3.5%) and unplanned clinic visits (3.8%) 6. Other trials confirmed the use of sofosbuvir/velpatasvir in various settings, including post-transplant contexts where it showed specific outcomes regarding allograft rejection and graft loss 1, as well as general treatment cohorts [16, 17].

Alternative regimens such as glecaprevir/pibrentasvir demonstrated high viral response rates at 2 and 4 weeks with no Grade 3 or higher treatment-related adverse events reported 20. Additionally, glecaprevir/pibrentasir showed a 12% on-treatment virologic failure rate but 0% post-treatment virologic relapse 11.

The use of Zepatier (elbasvir/grazoprevir) was evaluated across multiple studies; it showed no Grade 3 or higher treatment-related adverse events and stable kidney function at 6 and 12 months [5, 13, 15]. Other combinations including elbasvir/grazoprevir were also utilized in post-transplant settings 14 and as EBR/GZR 21.

Harvoni (ledipasvir/sofosbuvir) was associated with a statistically significant reduction in liver fibrosis 19, and significantly higher rates of ALT normalization compared to other sofosbuvir-based DAA therapies 19. Other interventions included ribavirin 9, antiretroviral therapy (ART) 8, and TDF with a boosted protease inhibitor, the latter of which showed specific changes in PBMC levels and renal biomarkers 18.

Recent results — preliminary, needs further review

  • Mobile Enhanced Prevention Support significantly increased the number of participants who initiated a PrEP regimen compared to those who did not (p=0.0006) 2.
  • Maraviroc showed no significant change in Hepatitis C viral load at 4 weeks or 7 days post-initiation 12.

For the clinician treating this condition

  • Sofosbuvir/velpatasvir is a highly effective treatment with high SVR12 rates and manageable safety profiles [6, 16, 17].
  • Harvoni (ledipasvir/sofosbuvir) is associated with significant improvements in liver fibrosis and ALT normalization 19.
  • Glecaprevir/pibrentasvir shows high early viral response rates and favorable safety profiles [11, 20].
  • Zepatier (elbasvir/grazoprevir) demonstrates a favorable safety profile regarding renal function and severe adverse events [5, 13, 15].

AI synthesis of 12 cited trials, updated Jun 23, 2026. Informational only — not medical advice; trial data sourced from ClinicalTrials.gov. How we use AI.

HCP Mode — summaries include clinical detail, trial data, and statistical outcomes.
Patient Mode — summaries use plain language, avoiding clinical jargon.

Research across Hepatitis

Related studies from across the Hepatitis family.

Elevated serum M2BPGi is associated with a 4.61 hazard ratio for hepatocellular carcinoma development
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Elevated serum M2BPGi is associated with a 4.61 hazard ratio for hepatocellular carcinoma development Elevated M2BPGi Levels Linked to Higher Risk of Liver Cancer
This systematic review and meta-analysis of 12,161 participants found that elevated serum M2BPGi is significantly associated with an increas…
A large review of over 12,000 patients found that high levels of a specific protein may signal an increased risk for liver cancer.
Dolutegravir and lamivudine achieved 78% HIV-1 RNA suppression in patients with isolated reactive anti-HBc
Infectious Disease RCT
Dolutegravir and lamivudine achieved 78% HIV-1 RNA suppression in patients with isolated reactive anti-HBc Trial shows dolutegravir and lamivudine are safe for patients with HIV
This pooled analysis of Phase 3/3b trials evaluated dolutegravir/lamivudine (DTG/3TC) in adults with HIV-1 and isolated reactive hepatitis B…
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Susceptibility-guided combination therapy improves neurological status and reduces abscess size in a patient with nocardiosis
Hematology Meta-analysis
Susceptibility-guided combination therapy improves neurological status and reduces abscess size in a patient with nocardiosis Case report: Brain infection in autoimmune hepatitis patient
This case report describes the management of disseminated nocardiosis in a 55-year-old man with autoimmune hepatitis. The patient showed gra…
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JAK inhibitors are associated with higher hepatitis B virus reactivation rates than IL-12/23 or IL-17 inhibitors
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JAK inhibitors are associated with higher hepatitis B virus reactivation rates than IL-12/23 or IL-17 inhibitors Specific Immune Inhibitors Show Varying Risks for Hepatitis B Reactivation
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New analysis shows that certain immune inhibitors like JAK inhibitors may carry a higher risk of hepatitis B reactivation than other drug cl…
HBeAg seroclearance in HBeAg-positive chronic hepatitis B correlates with disease remission and reduced hepatocellular carcinoma risk
Infectious Disease Sys. Review
HBeAg seroclearance in HBeAg-positive chronic hepatitis B correlates with disease remission and reduced hepatocellular carcinoma risk Clearing HBeAg helps manage chronic hepatitis B and liver risk
This systematic review examines the clinical significance and optimization strategies of HBeAg seroclearance in patients with HBeAg-positive…
Achieving HBeAg seroclearance in patients with chronic hepatitis B can lead to disease remission and a lower risk of developing liver cancer…
Autoimmune hepatitis pathogenesis shifts from single molecule to immune-metabolic network analysis
Drug Pipeline Sys. Review
Autoimmune hepatitis pathogenesis shifts from single molecule to immune-metabolic network analysis New Research Maps Complex Networks in Autoimmune Hepatitis
This systematic review reframes autoimmune hepatitis (AIH) pathogenesis from a single-molecule perspective to a systematic regulatory networ…
Researchers are moving beyond single-molecule views to map complex immune and metabolic networks that drive autoimmune hepatitis.
Evaluating the Impact of Digital Health Interventions on Chronic Disease Self-Care Outcomes
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Digital tools show promise for heart failure monitoring but lack consistent evidence for improving medication adherence or general diabetes …
New data shows that while digital tools like apps can help heart failure patients monitor their health, they may not improve medication habi…
PEG-IFN plus novel agents may boost functional cure in chronic hepatitis B
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PEG-IFN plus novel agents may boost functional cure in chronic hepatitis B Combination therapies may improve functional cure rates for chronic hepatitis B
This narrative review examines combining pegylated interferon-α with novel immunotherapies (antigen-reduction strategies, therapeutic vaccin…
A review suggests combining pegylated interferon with new immunotherapies could help achieve functional cure in chronic hepatitis B patients…
Review of antiviral and immunotherapeutic strategies for chronic hepatitis B
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Review of antiviral and immunotherapeutic strategies for chronic hepatitis B New antiviral strategies show promise for chronic hepatitis B infection
This narrative review synthesizes evidence on antiviral and immunotherapeutic strategies for chronic hepatitis B. The authors highlight func…
A review of new treatments suggests combination therapies may offer future value for managing chronic hepatitis B, cirrhosis, and liver canc…
Meta-analysis identifies genetic variants linked to HBV susceptibility and HCC risk
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Meta-analysis identifies genetic variants linked to HBV susceptibility and HCC risk Genetic Keys Unlock Why Some Get Liver Cancer From Hepatitis B
This meta-analysis of East Asian cohorts examined genetic variants associated with hepatitis B virus infection and hepatocellular carcinoma …
New research shows specific gene changes help explain why some people get Hepatitis B while others stay healthy.
Systematic review and meta-analysis of biopsy-guided versus clinically guided withdrawal in autoimmune hepatitis
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Systematic review and meta-analysis of biopsy-guided versus clinically guided withdrawal in autoimmune hepatitis Biopsy-guided withdrawal shows no benefit over clinical guidance for autoimmune hepatitis
This systematic review and meta-analysis evaluated relapse rates after treatment withdrawal in patients with autoimmune hepatitis.
A meta-analysis of 518 patients found that biopsy-guided withdrawal did not lower relapse rates compared to clinically guided withdrawal in …
HEV 239 vaccine induces durable humoral and cellular immunity in Bangladeshi women
Gastroenterology RCT
HEV 239 vaccine induces durable humoral and cellular immunity in Bangladeshi women Hepatitis E vaccine shows durable immunity in women
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A hepatitis E vaccine kept women protected for up to 3 years, with stronger immune memory than a comparison group.

Questions about Hepatitis C

How should healthcare workers follow up after an acute Hepatitis C Virus infection?

Healthcare workers with acute HCV should undergo baseline and serial HCV RNA testing, with follow-up for at least 6 months to confirm clearance or initiate treatment.

Full answer →
Why is the CDC recommending universal screening for Hepatitis C for pregnant women?

The CDC recommends universal Hepatitis C screening for all pregnant women because infection rates have doubled in the US since 2009, many cases go undiagnosed, and screening is now considered cost-effective.

Full answer →
Does taking ribavirin for Hepatitis C cause more genetic mutations in the virus?

Yes, ribavirin increases genetic mutations in HCV, as shown by a randomized trial that found higher mutational load and specific nucleotide changes in the virus.

Full answer →
How has the rate of Hepatitis C changed among younger adults in the US?

Hepatitis C rates have increased dramatically among younger US adults, driven by the opioid epidemic and injection drug use.

Full answer →

All Hepatitis C Articles