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Hepatitis C

Part of Hepatitis

27 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 1132 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 · 1,132 cited
  2. Phase 3 Sofosbuvir/Velpatasvir Fixed Dose Combination for 12 Weeks in Adults With Chronic HCV Infection Completed · 1,129 cited
  3. 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 · 861 cited
  4. 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 · 846 cited
  5. Phase 3 Sofosbuvir/Velpatasvir Fixed-Dose Combination in Adults With Chronic HCV Infection and Child-Pugh Class B Cirrhosis Completed · 804 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 · 671 cited
Show 44 more trials
  1. 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 · 559 cited
  2. 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 · 557 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 · 470 cited
  4. Phase 4 Hepatitis C Treatment in PWIDs: MAT or Syringe Exchange Assisted-therapy vs Standard of Care Completed · 309 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 · 303 cited
  6. Phase 4 Exploring Renal Transplants Using Hepatitis C Infected Donors for HCV-negative Recipients Completed · 302 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 · 279 cited
  8. 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
  9. 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
  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 · 227 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 · 198 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 · 157 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 · 148 cited
  17. Phase 3 Safety and Efficacy of Ledipasvir/Sofosbuvir Fixed-Dose Combination in Adults With Chronic HCV and HBV Coinfection Completed · 117 cited
  18. Phase 3 Efficacy and Safety of Sofosbuvir/Velpatasvir Fixed Dose Combination for 12 Weeks in Participants With Chronic HCV Completed · 115 cited
  19. 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 · 112 cited
  20. Phase 4 Monitoring SOF/VEL in Treatment Naïve, HCV Participants With Active Infection Completed · 111 cited
  21. 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 · 110 cited
  22. 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 · 76 cited
  23. Phase 3 Study of Grazoprevir (MK-5172) and Elbasvir (MK-8742) in Japanese Participants With Chronic Hepatitis C (MK-5172-058) Completed · 76 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 Randomised Study of Interferon-free Treatment for Recently Acquired Hepatitis C in PWID and People With HIV Coinfection. Completed · 53 cited
  27. 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
  28. Phase 4 Kidney Transplants in Hepatitis C Negative Recipients With Hepatitis C Viremic Donors Completed · 51 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 · 51 cited
  30. Phase 3 A Study to Evaluate Ombitasvir/Paritaprevir/Ritonavir and Dasabuvir in Treatment-Naïve Hepatitis C Virus Genotype 1b-Infected Adults 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 · 40 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 · 40 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 · 40 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 · 40 cited
  39. Phase 4 Concentration-Controlled Ribavirin for the Treatment of Patients With Chronic Hepatitis C Virus Infection Completed · 33 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 · 21 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.

HBeAg positivity and high HBV DNA levels increase postpartum ALT elevation risk in chronic hepatitis B
Primary Care & Family Medicine Meta-analysis
HBeAg positivity and high HBV DNA levels increase postpartum ALT elevation risk in chronic hepatitis B Risk Factors for Liver Inflammation in Mothers with Hepatitis B
This meta-analysis of cohort studies identifies key risk factors for postpartum alanine aminotransferase (ALT) elevation in women with chron…
Specific factors like HBeAg positivity and high viral DNA levels can increase the risk of liver inflammation in women with chronic hepatitis…
HBsAg prevalence 7.0% in dialysis patients, with low HBV-DNA and suboptimal vaccination
Infectious Disease Meta-analysis
HBsAg prevalence 7.0% in dialysis patients, with low HBV-DNA and suboptimal vaccination Hepatitis B infection rates among patients on dialysis
This meta-analysis of 79 articles estimates hepatitis B burden in dialysis patients globally. Pooled HBsAg prevalence was 7.0% (95% CI 6.1-8…
New data shows that about 7% of patients on dialysis have Hepatitis B, highlighting the need for safer procedures and better vaccination rat…
Community health workers support infectious disease management and PrEP navigation in agricultural communities
Neurology Sys. Review
Community health workers support infectious disease management and PrEP navigation in agricultural communities Community health workers help farm workers manage infectious diseases
This mini-review examines the role of community health workers (CHWs) in managing infectious diseases among California agricultural workers.…
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Hepatic macrophage metabolic reprogramming and bidirectional signaling dictate the balance between liver injury and regeneration
Gastroenterology Sys. Review
Hepatic macrophage metabolic reprogramming and bidirectional signaling dictate the balance between liver injury and regeneration New research identifies how liver cells communicate during chronic disease
This systematic review synthesizes the role of hepatic macrophages in metabolic dysfunction-associated steatotic liver disease, alcohol-asso…
New research reveals how specific immune cells in the liver switch between causing inflammation and repairing tissue damage.
Tonsillar metastasis in hepatocellular carcinoma patients may present as undifferentiated carcinoma with specific IHC markers
Oncology Sys. Review
Tonsillar metastasis in hepatocellular carcinoma patients may present as undifferentiated carcinoma with specific IHC markers Lenvatinib and Chemoembolization Treatment Linked to Liver Cancer Metastasis
This case report and literature review describes a single patient with hepatocellular carcinoma and chronic hepatitis B presenting with a to…
A rare case of liver cancer spreading to the tonsils highlights the need for careful monitoring of head and neck symptoms in patients with l…
Global HBsAg prevalence 3.2% in nurses, with 5.6% in Africa and 3.6% in LMICs
Gastroenterology Meta-analysis
Global HBsAg prevalence 3.2% in nurses, with 5.6% in Africa and 3.6% in LMICs Nurses Face Higher Hepatitis B Risk in Poorer Countries
This meta-analysis estimates global hepatitis B surface antigen (HBsAg) prevalence among hospital-based nurses at 3.2% (95% CI 2.3-4.4), wit…
A global analysis finds 3.2% of hospital nurses carry hepatitis B, with rates four times higher in poorer countries.
Peg-interferon add-on to nucleoside analogues achieves HBsAg loss in 8.6% of patients
Infectious Disease Meta-analysis
Peg-interferon add-on to nucleoside analogues achieves HBsAg loss in 8.6% of patients Adding peg-interferon to standard treatment helps some hepatitis B patients
This meta-analysis of 581 patients with chronic hepatitis B evaluates peg-interferon add-on to nucleoside analogue therapy. The analysis fou…
Adding peg-interferon to standard nucleoside therapy can help some patients with chronic hepatitis B achieve a key milestone in their treatm…
TZ84-based hepatitis A vaccine shows higher seroconversion rates and GMCs than HM175-based vaccine
Gastroenterology Meta-analysis
TZ84-based hepatitis A vaccine shows higher seroconversion rates and GMCs than HM175-based vaccine TZ84 vaccine shows stronger long-term protection against hepatitis A
This meta-analysis of 3,282 children and adolescents found that the TZ84-based hepatitis A vaccine is associated with higher seroconversion …
One type of hepatitis A vaccine shows higher antibody levels and longer protection in children compared to another common vaccine type.
HBsAg prevalence 9.98% in Cameroon, higher-risk groups 12.70%
Gastroenterology Meta-analysis
HBsAg prevalence 9.98% in Cameroon, higher-risk groups 12.70% New data reveals high rates of Hepatitis B in Cameroon
This meta-analysis of 100 studies estimates HBsAg prevalence at 9.98% in Cameroon, with lower-risk populations at 8.94% and higher-risk at 1…
Nearly 10 percent of people in Cameroon test positive for Hepatitis B, with higher rates found in certain high-risk groups.
Immune markers correlate with clinical outcomes following nucleos(t)ide analogue withdrawal in chronic hepatitis B
Gastroenterology Sys. Review
Immune markers correlate with clinical outcomes following nucleos(t)ide analogue withdrawal in chronic hepatitis B Immune Markers May Predict Outcomes After Hepatitis B Treatment
This mini review synthesizes immune correlates of outcome after nucleos(t)ide analogue withdrawal in patients with chronic hepatitis B. Bene…
New research identifies specific immune markers that may help predict how patients respond when stopping nucleoside analogue medications for…
Bidirectional virus-metabolism interaction in chronic hepatitis B and metabolic dysfunction-associated fatty liver disease
Allergy & Immunology Sys. Review
Bidirectional virus-metabolism interaction in chronic hepatitis B and metabolic dysfunction-associated fatty liver disease Liver disease and hepatitis B may fuel each other
This systematic review examines the interplay between viral infection and metabolic factors in patients with chronic hepatitis B and metabol…
Hepatitis B and fatty liver disease may worsen each other, raising liver cancer risk. New review explains the link.
Elevated serum M2BPGi is associated with a 4.61 hazard ratio for hepatocellular carcinoma development
Rheumatology Meta-analysis
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.

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