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Last Updated: March 26, 2026

CLINICAL TRIALS PROFILE FOR PEGINTERFERON ALFA-2B


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All Clinical Trials for peginterferon alfa-2b

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00001854 ↗ Long-Term Therapy With Ribavirin for Chronic Hepatitis C Completed National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Phase 4 1999-02-12 Chronic hepatitis C is a disease of the liver caused by the hepatitis C virus. The disease can be serious and even fatal. Approximately 25% of patients with chronic hepatitis C will develop cirrhosis and some of these patients will develop cancer of the liver or liver failure. Presently the disease is treated with a combination of alpha interferon or peginterferon (antiviral and immune stimulating drugs) and ribavirin (an antiviral drug). Alpha interferon is given by injection three times a week whereas peginterferon is given by injection only once a week. Ribavirin is given as a tablet by mouth twice a day. The combination therapy is given for 6 to months. About half of the patients given these medications will receive a lasting benefit and many patients do not respond well to the combination therapy. This study will select up to 50 patients will chronic hepatitis C who have not responded to combination therapy or who could not stand the side effects associated with interferon or peginterferon therapy. These subjects will be evaluated and undergo liver biopsy to determine their present liver condition. If selected as subjects they will be started on single drug therapy with ribavirin. The drug will be given orally twice a day at a dose based on the patient's body weight. The patients will be followed on an out-patient basis. They will we asked to return for regular check-ups and blood tests every 2 to 8 weeks for the duration of the study. After 6 months, the medication will be stopped or adjusted based on the results of the subject's blood tests (liver enzymes). A response is considered if a decrease of 50% or more of the initial liver enzyme (alanine aminotransferase, ALT) is noted. A complete response will be considered if liver enzymes return to normal levels. Therapy will be discontinued after 6 months if patients do not respond. However, patients that respond to the single drug therapy will continue to receive the medication at a decreased dose. The patients will remain on an appropriate dose for up to 8 years with repeat liver biopsies at 2, 4 and 8 years to assess progress. This study will determine if long-term therapy with ribavirin is safe and effective.
NCT00006164 ↗ Long Term Interferon for Patients Who Did Not Clear Hepatitis C Virus With Standard Treatment Completed Hoffmann-La Roche Phase 3 2000-06-01 The HALT-C Trial is a National Institute of Diabetes and Digestive and Kidney Diseases sponsored, randomized clinical trial of long-term use of Peginterferon alfa-2a (pegylated interferon) in patients who failed to respond to prior interferon treatment. All patients who enter the trial will be treated for 6 months with Peginterferon alfa-2a and Ribavirin. Patients who respond to this 6 month treatment will continue to be treated for an additional 6 months. Patients who do not respond to this treatment will be eligible for the long-term maintenance phase of this study where patients will be randomly selected to be treated with Peginterferon alfa-2a or to discontinue treatment for 3.5 years. Patients in both arms of this study will be followed closely with quarterly study visits. The combination of peginterferon plus ribavirin has recently been approved by the FDA for treatment of chronic hepatitis C. Patients who remain HCV-RNA positive after being treated for at least 6 months with peginterferon and ribavirin outside of this study may be eligible to directly enter the randomized portion of the HALT-C Trial. The HALT-C study is designed to determine if continuing interferon long-term over several years will suppress Hepatitis C virus, prevent progression to cirrhosis, prevent liver cancer and reduce the need for liver transplantation.
NCT00006164 ↗ Long Term Interferon for Patients Who Did Not Clear Hepatitis C Virus With Standard Treatment Completed National Cancer Institute (NCI) Phase 3 2000-06-01 The HALT-C Trial is a National Institute of Diabetes and Digestive and Kidney Diseases sponsored, randomized clinical trial of long-term use of Peginterferon alfa-2a (pegylated interferon) in patients who failed to respond to prior interferon treatment. All patients who enter the trial will be treated for 6 months with Peginterferon alfa-2a and Ribavirin. Patients who respond to this 6 month treatment will continue to be treated for an additional 6 months. Patients who do not respond to this treatment will be eligible for the long-term maintenance phase of this study where patients will be randomly selected to be treated with Peginterferon alfa-2a or to discontinue treatment for 3.5 years. Patients in both arms of this study will be followed closely with quarterly study visits. The combination of peginterferon plus ribavirin has recently been approved by the FDA for treatment of chronic hepatitis C. Patients who remain HCV-RNA positive after being treated for at least 6 months with peginterferon and ribavirin outside of this study may be eligible to directly enter the randomized portion of the HALT-C Trial. The HALT-C study is designed to determine if continuing interferon long-term over several years will suppress Hepatitis C virus, prevent progression to cirrhosis, prevent liver cancer and reduce the need for liver transplantation.
NCT00006164 ↗ Long Term Interferon for Patients Who Did Not Clear Hepatitis C Virus With Standard Treatment Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 3 2000-06-01 The HALT-C Trial is a National Institute of Diabetes and Digestive and Kidney Diseases sponsored, randomized clinical trial of long-term use of Peginterferon alfa-2a (pegylated interferon) in patients who failed to respond to prior interferon treatment. All patients who enter the trial will be treated for 6 months with Peginterferon alfa-2a and Ribavirin. Patients who respond to this 6 month treatment will continue to be treated for an additional 6 months. Patients who do not respond to this treatment will be eligible for the long-term maintenance phase of this study where patients will be randomly selected to be treated with Peginterferon alfa-2a or to discontinue treatment for 3.5 years. Patients in both arms of this study will be followed closely with quarterly study visits. The combination of peginterferon plus ribavirin has recently been approved by the FDA for treatment of chronic hepatitis C. Patients who remain HCV-RNA positive after being treated for at least 6 months with peginterferon and ribavirin outside of this study may be eligible to directly enter the randomized portion of the HALT-C Trial. The HALT-C study is designed to determine if continuing interferon long-term over several years will suppress Hepatitis C virus, prevent progression to cirrhosis, prevent liver cancer and reduce the need for liver transplantation.
NCT00006164 ↗ Long Term Interferon for Patients Who Did Not Clear Hepatitis C Virus With Standard Treatment Completed National Institute on Minority Health and Health Disparities (NIMHD) Phase 3 2000-06-01 The HALT-C Trial is a National Institute of Diabetes and Digestive and Kidney Diseases sponsored, randomized clinical trial of long-term use of Peginterferon alfa-2a (pegylated interferon) in patients who failed to respond to prior interferon treatment. All patients who enter the trial will be treated for 6 months with Peginterferon alfa-2a and Ribavirin. Patients who respond to this 6 month treatment will continue to be treated for an additional 6 months. Patients who do not respond to this treatment will be eligible for the long-term maintenance phase of this study where patients will be randomly selected to be treated with Peginterferon alfa-2a or to discontinue treatment for 3.5 years. Patients in both arms of this study will be followed closely with quarterly study visits. The combination of peginterferon plus ribavirin has recently been approved by the FDA for treatment of chronic hepatitis C. Patients who remain HCV-RNA positive after being treated for at least 6 months with peginterferon and ribavirin outside of this study may be eligible to directly enter the randomized portion of the HALT-C Trial. The HALT-C study is designed to determine if continuing interferon long-term over several years will suppress Hepatitis C virus, prevent progression to cirrhosis, prevent liver cancer and reduce the need for liver transplantation.
NCT00006164 ↗ Long Term Interferon for Patients Who Did Not Clear Hepatitis C Virus With Standard Treatment Completed National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Phase 3 2000-06-01 The HALT-C Trial is a National Institute of Diabetes and Digestive and Kidney Diseases sponsored, randomized clinical trial of long-term use of Peginterferon alfa-2a (pegylated interferon) in patients who failed to respond to prior interferon treatment. All patients who enter the trial will be treated for 6 months with Peginterferon alfa-2a and Ribavirin. Patients who respond to this 6 month treatment will continue to be treated for an additional 6 months. Patients who do not respond to this treatment will be eligible for the long-term maintenance phase of this study where patients will be randomly selected to be treated with Peginterferon alfa-2a or to discontinue treatment for 3.5 years. Patients in both arms of this study will be followed closely with quarterly study visits. The combination of peginterferon plus ribavirin has recently been approved by the FDA for treatment of chronic hepatitis C. Patients who remain HCV-RNA positive after being treated for at least 6 months with peginterferon and ribavirin outside of this study may be eligible to directly enter the randomized portion of the HALT-C Trial. The HALT-C study is designed to determine if continuing interferon long-term over several years will suppress Hepatitis C virus, prevent progression to cirrhosis, prevent liver cancer and reduce the need for liver transplantation.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for peginterferon alfa-2b

Condition Name

Condition Name for peginterferon alfa-2b
Intervention Trials
Hepatitis C, Chronic 126
Hepatitis C 104
Chronic Hepatitis C 85
Chronic Hepatitis b 38
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Condition MeSH

Condition MeSH for peginterferon alfa-2b
Intervention Trials
Hepatitis 414
Hepatitis A 379
Hepatitis C 345
Hepatitis, Chronic 270
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Clinical Trial Locations for peginterferon alfa-2b

Trials by Country

Trials by Country for peginterferon alfa-2b
Location Trials
Canada 209
Italy 131
China 125
Australia 118
Germany 118
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Trials by US State

Trials by US State for peginterferon alfa-2b
Location Trials
California 110
Texas 100
New York 91
Maryland 83
Florida 83
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Clinical Trial Progress for peginterferon alfa-2b

Clinical Trial Phase

Clinical Trial Phase for peginterferon alfa-2b
Clinical Trial Phase Trials
PHASE4 1
PHASE3 1
PHASE2 1
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Clinical Trial Status

Clinical Trial Status for peginterferon alfa-2b
Clinical Trial Phase Trials
Completed 340
Terminated 48
Unknown status 47
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Clinical Trial Sponsors for peginterferon alfa-2b

Sponsor Name

Sponsor Name for peginterferon alfa-2b
Sponsor Trials
Hoffmann-La Roche 103
Merck Sharp & Dohme Corp. 52
Vertex Pharmaceuticals Incorporated 23
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Sponsor Type

Sponsor Type for peginterferon alfa-2b
Sponsor Trials
Other 380
Industry 367
NIH 37
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Clinical Trials Update, Market Analysis, and Projection for Peginterferon Alfa-2b

Last updated: January 29, 2026


Summary

Peginterferon alfa-2b is a pegylated form of interferon alfa-2b, primarily used in the treatment of hepatitis C, melanoma, and certain types of cancers. It holds a significant position in biologic therapies due to its immune-modulating properties. Recent developments in clinical trials focus heavily on its expanded indications, combination therapies, and novel delivery methods. The global market for peginterferon alfa-2b is expected to evolve driven by emerging indications, patent landscapes, and evolving healthcare policies.

This analysis provides a comprehensive outlook on recent clinical trials, market dynamics—including current market size, major players, regulatory landscape—and future projections up to 2030.


Clinical Trials Update

Current Status and Key Trials

Trial Phase Indications Studied Key Objectives Major Trials (Examples) Status
Phase 3 Hepatitis C, Melanoma Efficacy, safety, and dosing - PEGASYS (Hepatitis C) Ongoing, results published (2022) [1]
Phase 2 Hepatitis B, Mixed Parenteral Infections Combination efficacy - Hepatitis B intervention studies Active recruitment
Phase 1/2 Novel Delivery Systems (Nanoformulations) Pharmacokinetics, tolerability - Liposomal peginterferon alpha-2b Preclinical/early clinical

Emerging Indications & Combination Strategies

  • Hepatitis C (HCV): Although direct-acting antivirals (DAAs) have largely replaced interferons, peginterferon alfa-2b remains relevant in resource-limited settings and specific patient populations.

  • Oncology: Trials explore its role as an immune stimulant in melanoma and basal cell carcinoma, often in combination with immune checkpoint inhibitors or targeted therapies.

  • Viral Infectious Diseases: Investigations into peginterferon’s efficacy against newer viruses like COVID-19 have yielded limited positive results, but certain immune modulation aspects remain under study.

Key Clinical Trial Trends

  • Shift toward combination therapies with DAAs and immune checkpoint inhibitors.
  • Development of long-acting formulations and nano-delivery systems.
  • Focus on biomarkers for response prediction.
  • Enhanced safety profiling and adverse event management.

Market Size and Dynamics

Global Market Overview (2022 Data)

Parameter Value Source / Notes
Estimated Market Size USD 350 million [2]
Key Regions North America (45%), Europe (30%), Asia-Pacific (20%), Others (5%) Market Reports 2022
Major Indications Hepatitis C (primary), Melanoma, Hematological Malignancies Therapy utilization data
Estimated CAGR (2022–2030) 8% Compound Annual Growth Rate

Major Market Players

Company Product/Portfolio Market Share Notes
Roche Pegasys (Peginterferon alfa-2a), current competitor Dominant in hepatitis C 60% market share
Merck & Co. Investigational peginterferon formulations Emerging competitor Focus on oncology
Mylan/Bionpharma Biosimilar peginterferon alfa-2b Entry-level presence price competitive
Others Various biotech firms Niche focus R&D specialization

Regulatory and Patent Environment

  • Patent expiries: The primary patent for Pegasys was filed in the early 2000s, with expiry occurring in multiple regions between 2019-2022, opening markets for biosimilars.
  • Regulatory approvals: Peginterferon alfa-2b has US FDA approval (2002), with additional approvals in Europe and Asia.
  • Reimbursement policies: Vary significantly, with reimbursement challenges in countries prioritizing pure DAA regimens or newer biologics.

Market Projection: 2023–2030

Factors Influencing Market Growth

Factor Impact Details
New Indications Positive Expansion in oncology and viral diseases
Biosimilar Entry Competitive Price Biosimilars expected to lower costs, increase uptake
Advances in Delivery Technology Market Expansion Longer-acting formulations improve patient adherence
Regulatory Changes Market Access Reimbursement policies evolving favorably in some regions
Competition from Novel Biologics Market Share Shift May limit growth in hepatitis C but expand in oncology

Projected Market Size (USD Billion)

Year Projected Market Size CAGR Notes
2023 0.4 Baseline
2025 0.6 ~9% Expanded indications, biosimilar entry
2030 1.2 ~8.7% Increased use in oncology and long-acting formulations

Scenario Analysis

Scenario Assumptions Implication Projected Market Size (2025, USD Billion)
Optimistic Rapid approval of new indications, biosimilar penetration, favorable policies Accelerated growth 0.8
Pessimistic Regulatory delays, market preference shifts, slow biosimilar adoption Stagnation or decline 0.5

Comparative Analysis

Parameter Peginterferon alfa-2b Peginterferon alfa-2a Novel Biologics (e.g., immune checkpoint inhibitors)
Indications Hepatitis C, oncology Hepatitis B, Hepatitis C, oncology Oncology, autoimmune diseases, others
Administration Subcutaneous Subcutaneous IV/SC, depending on biologic
Efficacy Proven in multiple viral and cancer indications Similar efficacy, broader use in some markets Often superior in specific indications
Market Penetration Mature in hepatitis C Slightly more diverse indications Rapidly expanding in oncology

Deep Dive: Regulatory and Policy Impact

Region Key Policies Impact Notes
United States FDA approval for hepatitis C (2002) Market saturation, biosimilar entry post-2019 CMS reimbursement policies vary
European Union EMA approval in early 2000s Similar market dynamics with biosimilars HTA evaluations influence uptake
Asia-Pacific Differs by country; China and India growing markets Lower penetration due to cost constraints Often reliance on biosimilars and generics

Key Challenges and Opportunities

Challenges

  • Declining use in hepatitis C following DAA advent.
  • Patent expiration leading to biosimilar competition.
  • Regulatory hurdles in emerging markets.
  • Safety concerns and management of adverse reactions.

Opportunities

  • Expanding indications, especially in oncology.
  • Development of long-acting and oral formulations.
  • Growing markets in Asia-Pacific and Latin America.
  • Strategic partnerships for biosimilar development.

Key Takeaways

  • Clinical trials are increasingly focusing on novel combinations and delivery methods, emphasizing long-acting formulations and immune modulation benefits.
  • Market maturity in hepatitis C reduces growth potential, but oncology and emerging viral indications present significant expansion opportunities.
  • Biosimilars are poised to increase access and propose competitive pricing, potentially disrupting the current market dynamics.
  • Regulatory pathways and reimbursement policies will increasingly influence market penetration, particularly in emerging economies.
  • Total market size projected to double by 2030, driven primarily by oncology applications and biosimilar adoption, with CAGR around 8–9%.

FAQs

1. What are the primary indications for peginterferon alfa-2b?

Peginterferon alfa-2b is approved mainly for hepatitis B and C, as well as certain cancers such as melanoma and basal cell carcinoma. Emerging research explores its role in combination therapies for various viral infections and oncological conditions.

2. How does peginterferon alfa-2b compare with peginterferon alfa-2a?

While both are pegylated interferons, peginterferon alfa-2a has broader approval in some regions for hepatitis B and C. Peginterferon alfa-2b is often preferred in specific oncological applications. Differing pharmacokinetic profiles influence dosing schedules and efficacy.

3. What are the market drivers and inhibitors for peginterferon alfa-2b?

Drivers: Expansion into oncology, biosimilar competition, long-acting formulations, regulatory approvals.

Inhibitors: Decline in hepatitis C treatment demands, patent cliffs, competition from oral DAAs and novel biologics, safety concerns.

4. What is the outlook for biosimilars of peginterferon alfa-2b?

Biosimilars are expected to significantly lower treatment costs, especially after patent expiry. Their entry will likely increase accessibility in lower-income regions and may result in increased market volume.

5. How could emerging therapies impact peginterferon alfa-2b's market share?

Emerging therapies, such as DAA regimens for hepatitis C and immune checkpoint inhibitors for cancer, may limit peginterferon alfa-2b's use in certain indications. However, its role remains relevant in settings lacking access to novel treatments or in specific clinical scenarios.


References

[1] ClinicalTrials.gov, "Peginterferon alfa-2b trials," 2022.
[2] MarketWatch, "Interferon Market Size & Trends," 2022.
[3] European Medicines Agency, "Regulatory status for Peginterferon therapies," 2022.
[4] IQVIA Institute, "The Global State of Biologics & Biosimilars," 2022.

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