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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Pegylated interferon alpha-2a Clear all
Completed Phase 3 Interventional

A Study of TMC435 in Combination With Peginterferon Alfa-2A and Ribavirin for Hepatitis C Virus Genotype-1 Infected Patients Who Participated in a Control Group of a TMC435 Study

NCT01323244
View directory record Official record
Conditions
Hepatitis C
Interventions
TMC435
Drug
Lead sponsor
Janssen R&D Ireland
Industry
Eligibility
18 Years to 99 Years
Enrollment
142 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
15
States / cities
Bakersfield, California • Los Angeles, California • San Diego, California + 12 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2016 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 2 Interventional Results available

Dose-Ranging Study of Sofosbuvir in Combination With Pegylated Interferon and Ribavirin in Treatment Naïve GT 1 HCV Patients

NCT01054729
View directory record Official record
Conditions
Hepatitis C
Interventions
Sofosbuvir, Placebo, PEG, RBV
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years to 65 Years
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
6
States / cities
San Francisco, California • Gainesville, Florida • Orlando, Florida + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 16, 2014 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Alisporivir Triple Therapy in Chronic Hepatitis C Genotype 1 Treatment-naïve Participants

NCT01318694
View directory record Official record
Conditions
Hepatitis C
Interventions
Alisporivir, Peginterferon alfa-2a, Ribavirin, ALV Placebo
Drug
Lead sponsor
Debiopharm International SA
Industry
Eligibility
18 Years to 70 Years
Enrollment
1,081 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
32
States / cities
Beverly Hills, California • Oakland, California • San Diego, California + 23 more
Source: ClinicalTrials.gov public record
Updated Sep 29, 2016 · Synced Sep 29, 2026, 4:33 AM EDT
Completed No phase listed Observational

Brain Deficits in HIV/HCV Coinfected People Before and After Anti-HCV Therapy

NCT00747539
View directory record Official record
Conditions
HIV, Hepatitis C, Infections
Interventions
Pegylated interferon alfa and ribavirin (PEG-IFN/RBV)
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
330 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2015
U.S. locations
4
States / cities
Lancaster, California • Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 12, 2016 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 1 Interventional

A Study to Assess the Safety and Tolerability of Atezolizumab in Combination With Other Immune-Modulating Therapies in Participants With Locally Advanced or Metastatic Solid Tumors

NCT02174172
View directory record Official record
Conditions
Solid Cancers
Interventions
Atezolizumab, Bevacizumab, Interferon alfa-2b, Ipilimumab, Obinutuzumab, PEG-interferon alfa-2a
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years and older
Enrollment
158 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
8
States / cities
Scottsdale, Arizona • Los Angeles, California • New Haven, Connecticut + 3 more
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Sep 29, 2026, 4:33 AM EDT
Recruiting Phase 3 Interventional

A Phase 3 Study of INCA033989 Versus Best Available Therapy in Participants With Essential Thrombocythemia

NCT07623200
View directory record Official record
Conditions
Essential Thrombocythemia
Interventions
INCA033989, Best Available Treatment
Drug
Lead sponsor
Incyte Corporation
Industry
Eligibility
18 Years and older
Enrollment
426 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
40
States / cities
Gilbert, Arizona • Duarte, California • Greenbrae, California + 32 more
Source: ClinicalTrials.gov public record
Updated Sep 13, 2026 · Synced Sep 29, 2026, 4:33 AM EDT
Withdrawn Phase 2 Interventional

Hepatitis B Immune Globulin (HBIg) to Restore Immune Control in People With Chronic Hepatitis B

NCT03575208
View directory record Official record
Conditions
Chronic Hepatitis B
Interventions
hepatitis B immune globulin (HBIg), Pegylated interferon alfa (pegIFN)
Biological · Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 5, 2022 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 3 Interventional

Hepatitis C Antiviral Resistance in African-Americans

NCT00038974
View directory record Official record
Conditions
Hepatitis C
Interventions
peginterferon alfa-2a, Ribavirin
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 70 Years
Enrollment
401 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2005
U.S. locations
8
States / cities
San Francisco, California • Miami, Florida • Chicago, Illinois + 5 more
Source: ClinicalTrials.gov public record
Updated Aug 2, 2017 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 2 Interventional Results available

Pegylated Interferon to Treat Chronic Hepatitis D

NCT00023322
View directory record Official record
Conditions
Hepatitis D
Interventions
Peginterferon Alpha-2a
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2012
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 9, 2013 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 3 Interventional Results available

Sofosbuvir With Peginterferon Alfa 2a and Ribavirin for 12 Weeks in Treatment-Naive Subjects With Chronic Genotype 1, 4, 5, or 6 HCV Infection

NCT01641640
View directory record Official record
Conditions
Chronic Hepatitis C
Interventions
Sofosbuvir, RBV, PEG
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years and older
Enrollment
328 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
55
States / cities
Birmingham, Alabama • Coronado, California • Los Angeles, California + 43 more
Source: ClinicalTrials.gov public record
Updated May 7, 2014 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 2 Interventional Results available

Safety, Tolerability, and Antiviral Activity of ACH-0141625 or Placebo in Combination With Peginterferon and Ribavirin in Hepatitis C Virus (HCV) Positive Participants

NCT01180790
View directory record Official record
Conditions
Hepatitis C
Interventions
ACH-0141625 (Sovaprevir), Placebo, Pegylated Interferon alpha-2a, Ribavirin
Drug
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
15
States / cities
Los Angeles, California • San Francisco, California • Bradenton, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Aug 29, 2023 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 2 Interventional

A Study of Hepatitis C Virus (HCV) Polymerase Inhibitor Pro-Drug in Combination With PEGASYS With or Without COPEGUS in Patients With Chronic Hepatitis C (CHC) Genotype 1 Infection.

NCT00377182
View directory record Official record
Conditions
Hepatitis C, Chronic
Interventions
Copegus, PEGASYS, RO5024048 1500mg, RO5024048 3000mg
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years to 65 Years
Enrollment
107 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
17
States / cities
La Jolla, California • Long Beach, California • Sacramento, California + 13 more
Source: ClinicalTrials.gov public record
Updated Nov 1, 2016 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 3 Interventional

Thymosin Plus PEG-Interferon in Non-Cirrhotic Hepatitis C Patients Who Did Not Respond to Interferon or Interferon Plus Ribavirin

NCT00040027
View directory record Official record
Conditions
Hepatitis C, Hepatitis C, Chronic
Interventions
thymalfasin (thymosin alpha 1) + PEGinterferon alfa-2a, placebo + PEGinterferon alfa-2a
Drug
Lead sponsor
SciClone Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2002
U.S. locations
46
States / cities
Mobile, Alabama • Scottsdale, Arizona • Berkeley, California + 36 more
Source: ClinicalTrials.gov public record
Updated Jan 14, 2008 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 3 Interventional Results available

PEDS-C: Pegylated Interferon +/- Ribavirin for Children With Hepatitis C

NCT00100659
View directory record Official record
Conditions
Chronic Hepatitis C
Interventions
Pegylated Interferon/ribavirin
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
5 Years to 18 Years
Enrollment
114 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
11
States / cities
San Francisco, California • Denver, Colorado • Washington D.C., District of Columbia + 8 more
Source: ClinicalTrials.gov public record
Updated Oct 23, 2018 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Not applicable Interventional

Directly Observed Hepatitis C Treatment in Methadone Clinics

NCT01442311
View directory record Official record
Conditions
Hepatitis C, Medication Adherence
Interventions
enhanced DOT (both pegylated interferon alfa-2a and ribavirin), standard DOT (PEG-DOT control arm)
Other
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2013
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jun 25, 2015 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 2 Interventional Results available

A Dose Ranging Study Of PF-00868554 In Combination With PEGASYS And COPEGUS In Patients With Chronic Hepatitis C Genotype 1 Infection

NCT00720434
View directory record Official record
Conditions
Hepatitis C
Interventions
PF-00868554, Placebo
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 65 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
9
States / cities
La Jolla, California • San Francisco, California • Orlando, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2013 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 2 Interventional Results available

Study of Daclatasvir (BMS-790052) Add-on to Standard of Care in Treatment- naïve Patients

NCT01125189
View directory record Official record
Conditions
Hepatitis C Virus
Interventions
Daclatasvir, Placebo, peg-interferon alfa-2a, ribavirin
Drug
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years to 70 Years
Enrollment
558 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
33
States / cities
Montgomery, Alabama • La Jolla, California • Los Angeles, California + 26 more
Source: ClinicalTrials.gov public record
Updated Oct 22, 2015 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 1Phase 2 Interventional

Interferon Alfa in Treating Patients With Advanced Kidney Cancer

NCT00003542
View directory record Official record
Conditions
Kidney Cancer
Interventions
pegylated interferon alfa
Biological
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2004
U.S. locations
2
States / cities
Los Angeles, California • New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 24, 2013 · Synced Sep 29, 2026, 4:33 AM EDT
Not listed Phase 2 Interventional

Efficacy and Safety Study of PEG-rIL-29 Plus Ribavirin to Treat Chronic Hepatitis C Virus Infection

NCT01001754
View directory record Official record
Conditions
Hepatitis C, Chronic
Interventions
PEG-rIL-29, Peginterferon alfa-2a, Ribavirin
Drug
Lead sponsor
ZymoGenetics
Industry
Eligibility
18 Years to 70 Years
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
29
States / cities
Beverly Hills, California • Coronado, California • La Jolla, California + 26 more
Source: ClinicalTrials.gov public record
Updated Dec 4, 2011 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 3 Interventional Results available

VX-950-C211 - A Dosing Regimen Study (Twice Daily Versus Every 8 Hours) of Telaprevir in Treatment-naïve Participants With Genotype 1 Chronic Hepatitis C Virus Infection

NCT01241760
View directory record Official record
Conditions
Genotype 1 Chronic Hepatitis C, Treatment Naive
Interventions
Ribavirin, Telaprevir, Pegylated interferon alfa-2a
Drug
Lead sponsor
Janssen Infectious Diseases BVBA
Industry
Eligibility
18 Years to 70 Years
Enrollment
744 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
37
States / cities
La Jolla, California • Los Angeles, California • San Diego, California + 34 more
Source: ClinicalTrials.gov public record
Updated Jun 3, 2014 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 2 Interventional

Study to Determine the Effectiveness of Antiviral Combination Therapy to Treat Hepatitis C Virus (HCV) Infected Patients Who Have Previously Failed Standard of Care

NCT01012895
View directory record Official record
Conditions
Chronic Hepatitis C
Interventions
BMS-790052, BMS-650032, Pegylated-interferon alfa-2a, Ribavirin
Drug
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years to 70 Years
Enrollment
215 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
10
States / cities
Anaheim, California • Coronado, California • San Jose, California + 7 more
Source: ClinicalTrials.gov public record
Updated Oct 8, 2015 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 3 Interventional Results available

A Phase 3 Study of Telaprevir in Combination With Pegasys® and Copegus® in Treatment-Naive Subjects With Genotype 1 Hepatitis C Virus (HCV)

NCT00627926
View directory record Official record
Conditions
Hepatitis C
Interventions
Pegylated Interferon Alfa 2a, Telaprevir, Ribavirin, Placebo
Biological · Drug · Other
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years to 70 Years
Enrollment
1,095 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
65
States / cities
Birmingham, Alabama • Phoenix, Arizona • Fresno, California + 48 more
Source: ClinicalTrials.gov public record
Updated Aug 7, 2014 · Synced Sep 29, 2026, 4:33 AM EDT
Recruiting Phase 2 Interventional

VIR-2218 and Peginterferon Alfa-2a for Chronic Hepatitis B

NCT06092333
View directory record Official record
Conditions
Chronic Hepatitis B
Interventions
VIR-2218 and peginterferon alfa-2a
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 17, 2026 · Synced Sep 29, 2026, 4:33 AM EDT
Completed Phase 1Phase 2 Interventional

Pharmacokinetics of Multiple Ascending Doses of VCH-222 in Subjects With Chronic Hepatitis C Infection

NCT00911963
View directory record Official record
Conditions
Hepatitis C
Interventions
VCH-222 or matching placebo, peginterferon alfa-2a, ribavirin
Drug · Biological
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years to 65 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
4
States / cities
Marietta, Georgia • Detroit, Michigan • Dallas, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 9, 2014 · Synced Sep 29, 2026, 4:33 AM EDT