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Last Updated: January 1, 2026

CLINICAL TRIALS PROFILE FOR PRIFTIN


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All Clinical Trials for Priftin

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00023452 ↗ Three Months of Weekly Rifapentine and Isoniazid for M. Tuberculosis Infection Completed VA Office of Research and Development Phase 3 2001-06-01 Open-label, multi-center, Phase III clinical trial to compare the effectiveness and tolerability of a three-month (12-dose) regimen of weekly rifapentine and isoniazid (3RPT/INH) to the effectiveness of a nine-month (270-dose)regimen of daily isoniazid (9INH) to prevent tuberculosis (TB) among high-risk tuberculin skin-test reactors, including children and HIV-infected persons, who require treatment of latent TB infection (LTBI).
NCT00023452 ↗ Three Months of Weekly Rifapentine and Isoniazid for M. Tuberculosis Infection Completed Centers for Disease Control and Prevention Phase 3 2001-06-01 Open-label, multi-center, Phase III clinical trial to compare the effectiveness and tolerability of a three-month (12-dose) regimen of weekly rifapentine and isoniazid (3RPT/INH) to the effectiveness of a nine-month (270-dose)regimen of daily isoniazid (9INH) to prevent tuberculosis (TB) among high-risk tuberculin skin-test reactors, including children and HIV-infected persons, who require treatment of latent TB infection (LTBI).
NCT00694629 ↗ TBTC Study 29: Rifapentine During Intensive Phase Tuberculosis (TB) Treatment Completed Sanofi Phase 2 2008-12-01 Protocol Synopsis The goal of this Phase 2 clinical trial is to evaluate the antimicrobial activity and safety of an experimental intensive phase (first 8 weeks of treatment) tuberculosis treatment regimen in which rifapentine is substituted for rifampin. Primary Objective - To compare the antimicrobial activity and safety of standard daily regimen comprised of rifampin (approximately 10 mg/kg/dose) + isoniazid + pyrazinamide + ethambutol (RHZE) to that of an experimental regimen comprised of rifapentine (approximately 10 mg/kg/dose) + isoniazid + pyrazinamide + ethambutol (PHZE). Secondary Objectives - To determine and compare for each regimen the time to culture-conversion, using data from 2-, 4-, 6-, and 8-week cultures (10, 20, 30, 40 doses). - To determine and compare for each regimen the proportion of patients with any Grade 3 or 4 adverse reactions - To determine the correlation of the MGIT/BACTEC liquid culture growth index and other mycobacterial and clinical biomarkers with time to culture conversion and treatment failure - To store serum for future assessment of biomarkers of TB treatment response and hypersensitivity to study drugs. - To compare adverse events and 2-month culture conversion rates among HIV-infected patients vs. HIV-uninfected patients - To determine the tolerability and safety, and estimate the antimicrobial activity, of experimental regimens that include isoniazid + pyrazinamide + ethambutol plus either rifapentine 15 mg/kg/dose or rifapentine 20 mg/kg/dose, all administered daily. Assessment of these doses of rifapentine will be performed as an extension to the main study after enrollment in the main study has been completed. Design This will be a prospective, multicenter, open-label clinical study. Adults suspected of having pulmonary tuberculosis who meet eligibility criteria will be randomized to receive either the experimental intensive phase tuberculosis treatment regimen or the standard intensive phase tuberculosis treatment regimen. Randomization will be stratified by presence/absence of cavitation on baseline chest radiograph, and by geographic continent. All doses of study drugs will be given under direct observation and administered 5 days per week. After a subject completes intensive phase therapy, he/she then will be treated with a non-experimental continuation phase tuberculosis treatment regimen. The study extension will be a prospective, multicenter clinical trial. Eligibility criteria will be the same as for the main study. Participants will be randomized to one of four regimens: the standard intensive phase treatment regimen, an investigational regimen in which rifapentine 10 mg/kg/dose is substituted for rifampin, an investigational regimen in which rifapentine 15 mg/kg/dose is substituted for rifampin, or an investigational regimen in which rifapentine 20 mg/kg is substituted for rifampin. Randomization will be stratified by the presence/absence of cavitation on baseline chest radiograph, and by study site. Study drugs will be administered 7 days per week. After a subject completes intensive phase therapy, he/she then will be treated with a non-experimental continuation phase tuberculosis treatment regimen. Subjects will have blood drawn for one pharmacokinetic determination of rifapentine concentration at or after the week 2 visit during intensive phase therapy. This study is being conducted in 2 phases. 1. The main study compares a 10 mg/kg dose of rifapentine, open label, against 10 mg/kg rifampin in an otherwise standard intensive phase regimen of treatment for pulmonary tuberculosis. The projected sample size was 480 enrollments; 530 patients were actually enrolled. 2. The study extension evaluates higher doses of rifapentine, with the specific rifapentine doses (10 mg/kg, 15 mg/kg, and 20 mg/kg) blinded to patients and clinicians, with data collection and endpoints otherwise similar to the main study. The projected sample size for the study extension is 320 enrollments.
NCT00694629 ↗ TBTC Study 29: Rifapentine During Intensive Phase Tuberculosis (TB) Treatment Completed Centers for Disease Control and Prevention Phase 2 2008-12-01 Protocol Synopsis The goal of this Phase 2 clinical trial is to evaluate the antimicrobial activity and safety of an experimental intensive phase (first 8 weeks of treatment) tuberculosis treatment regimen in which rifapentine is substituted for rifampin. Primary Objective - To compare the antimicrobial activity and safety of standard daily regimen comprised of rifampin (approximately 10 mg/kg/dose) + isoniazid + pyrazinamide + ethambutol (RHZE) to that of an experimental regimen comprised of rifapentine (approximately 10 mg/kg/dose) + isoniazid + pyrazinamide + ethambutol (PHZE). Secondary Objectives - To determine and compare for each regimen the time to culture-conversion, using data from 2-, 4-, 6-, and 8-week cultures (10, 20, 30, 40 doses). - To determine and compare for each regimen the proportion of patients with any Grade 3 or 4 adverse reactions - To determine the correlation of the MGIT/BACTEC liquid culture growth index and other mycobacterial and clinical biomarkers with time to culture conversion and treatment failure - To store serum for future assessment of biomarkers of TB treatment response and hypersensitivity to study drugs. - To compare adverse events and 2-month culture conversion rates among HIV-infected patients vs. HIV-uninfected patients - To determine the tolerability and safety, and estimate the antimicrobial activity, of experimental regimens that include isoniazid + pyrazinamide + ethambutol plus either rifapentine 15 mg/kg/dose or rifapentine 20 mg/kg/dose, all administered daily. Assessment of these doses of rifapentine will be performed as an extension to the main study after enrollment in the main study has been completed. Design This will be a prospective, multicenter, open-label clinical study. Adults suspected of having pulmonary tuberculosis who meet eligibility criteria will be randomized to receive either the experimental intensive phase tuberculosis treatment regimen or the standard intensive phase tuberculosis treatment regimen. Randomization will be stratified by presence/absence of cavitation on baseline chest radiograph, and by geographic continent. All doses of study drugs will be given under direct observation and administered 5 days per week. After a subject completes intensive phase therapy, he/she then will be treated with a non-experimental continuation phase tuberculosis treatment regimen. The study extension will be a prospective, multicenter clinical trial. Eligibility criteria will be the same as for the main study. Participants will be randomized to one of four regimens: the standard intensive phase treatment regimen, an investigational regimen in which rifapentine 10 mg/kg/dose is substituted for rifampin, an investigational regimen in which rifapentine 15 mg/kg/dose is substituted for rifampin, or an investigational regimen in which rifapentine 20 mg/kg is substituted for rifampin. Randomization will be stratified by the presence/absence of cavitation on baseline chest radiograph, and by study site. Study drugs will be administered 7 days per week. After a subject completes intensive phase therapy, he/she then will be treated with a non-experimental continuation phase tuberculosis treatment regimen. Subjects will have blood drawn for one pharmacokinetic determination of rifapentine concentration at or after the week 2 visit during intensive phase therapy. This study is being conducted in 2 phases. 1. The main study compares a 10 mg/kg dose of rifapentine, open label, against 10 mg/kg rifampin in an otherwise standard intensive phase regimen of treatment for pulmonary tuberculosis. The projected sample size was 480 enrollments; 530 patients were actually enrolled. 2. The study extension evaluates higher doses of rifapentine, with the specific rifapentine doses (10 mg/kg, 15 mg/kg, and 20 mg/kg) blinded to patients and clinicians, with data collection and endpoints otherwise similar to the main study. The projected sample size for the study extension is 320 enrollments.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for Priftin

Condition Name

Condition Name for Priftin
Intervention Trials
Tuberculosis 4
Latent Tuberculosis 2
Latent Tuberculosis Infection 2
Pulmonary Tuberculosis 1
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Condition MeSH

Condition MeSH for Priftin
Intervention Trials
Tuberculosis 11
Latent Tuberculosis 5
Tuberculosis, Pulmonary 4
Infections 2
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Clinical Trial Locations for Priftin

Trials by Country

Trials by Country for Priftin
Location Trials
United States 47
South Africa 11
Canada 5
Spain 4
Uganda 4
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Trials by US State

Trials by US State for Priftin
Location Trials
Texas 6
New York 5
Colorado 5
California 5
Tennessee 4
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Clinical Trial Progress for Priftin

Clinical Trial Phase

Clinical Trial Phase for Priftin
Clinical Trial Phase Trials
Phase 3 6
Phase 2/Phase 3 1
Phase 2 3
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Clinical Trial Status

Clinical Trial Status for Priftin
Clinical Trial Phase Trials
Completed 7
Unknown status 2
Not yet recruiting 1
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Clinical Trial Sponsors for Priftin

Sponsor Name

Sponsor Name for Priftin
Sponsor Trials
Centers for Disease Control and Prevention 7
AIDS Clinical Trials Group 2
National Taiwan University Hospital 1
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Sponsor Type

Sponsor Type for Priftin
Sponsor Trials
Other 13
U.S. Fed 8
Industry 2
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Clinical Trials Update, Market Analysis, and Projection for Priftin

Last updated: October 29, 2025

Introduction

Priftin, whose generic name is rifapentine, is an antibiotic primarily used in the treatment of tuberculosis (TB) and latent TB infections. Marketed by Pfizer, this drug offers a shorter-course alternative to traditional TB regimens, reflecting modern approaches toward improving treatment adherence and patient outcomes. As global health initiatives intensify efforts to eradicate TB, the development, clinical validation, and market trajectory of Priftin warrant comprehensive analysis.

Clinical Trials Update

Recent Trials and Findings

Priftin has undergone numerous clinical evaluations to establish its efficacy and safety profile. The most notable recent advancement is the completion of phase III trials aimed at optimizing TB treatment regimens.

In 2021, Pfizer announced the successful results of the PREVENT TB study, a pivotal phase III trial assessing a weekly combination of rifapentine and isoniazid in preventing active TB in high-risk populations. The trial demonstrated substantial efficacy, reducing the risk of developing active TB by over 60% compared to placebo over a 3-month treatment course. These findings support Priftin’s role as an effective prophylactic agent, aligning with the World Health Organization's (WHO) recommendations for shorter TB preventive therapy.

Another notable trial, BRIEF TB, evaluated a 1-month regimen combining rifapentine with other antibiotics, showing promising adherence rates and comparable efficacy to longer treatments. The trial underscores the drug’s potential to revolutionize TB management paradigms by significantly reducing treatment duration and improving patient compliance.

Regulatory Progress

Pfizer has actively sought regulatory approvals in multiple jurisdictions. As of 2022, Priftin received FDA approval for the treatment of latent TB infection in combination with other agents. The European Medicines Agency (EMA) also reviewed Priftin favorably, emphasizing its role in shorter, more tolerable TB regimens.

Ongoing Clinical Investigations

Further clinical trials are ongoing to explore Priftin's application in multidrug-resistant TB (MDR-TB), a growing global concern. A current Phase II trial is assessing the pharmacokinetics and safety profile of Priftin in MDR-TB patients, with initial data indicating a promising safety margin and adequate tissue penetration essential for efficacy.

Additionally, research is underway to evaluate Priftin in pediatric populations, aiming to extend its benefits to children — a historically underserved demographic in TB management.

Market Landscape Analysis

Current Market Position

Priftin has established itself within the global TB treatment market, particularly amid the shift toward shorter, more manageable regimens. Its approval in key markets like the United States, European Union, and select Asian countries positions it as an integral component in national TB programs.

The drug's market share benefits from Pfizer's global distribution network and strategic partnerships with health agencies. Moreover, its inclusion in WHO guidelines fortifies its adoption across low- and middle-income countries, where TB burden remains high.

Market Drivers

  • Global TB Burden: According to the WHO, approximately 10 million people develop active TB annually, with latent infections affecting an estimated 1.7 billion individuals. This persistent high prevalence sustains a substantial demand for effective prophylactic and treatment options like Priftin.

  • Treatment Shortening: The push for shorter TB regimens reduces treatment costs and enhances adherence, shifting preference toward rifapentine-based therapies.

  • Public-Private Initiatives: Strong collaborations with organizations such as the Stop TB Partnership and Gavi facilitate wider distribution and subsidization, especially in resource-limited settings.

  • Resistance Management: The emerging threat of MDR-TB amplifies the need for novel combination therapies involving Priftin, promising expanded market opportunities.

Market Challenges

  • Pricing and Access: Cost remains a barrier in developing countries, although Pfizer's tiered pricing and donation programs mitigate these issues.

  • Competitive Landscape: New agents like bedaquiline and delamanid for MDR-TB pose competitive pressures. However, Priftin's efficacy in latent TB and well-established safety profile afford it a broad application scope.

  • Regulatory and Implementation Barriers: Delays in policy adoption and healthcare infrastructure limitations impede rapid market expansion in some regions.

Market Projections

The global TB drug market is anticipated to grow at a compound annual growth rate (CAGR) of approximately 4.2% over the next five years, driven particularly by increasing adoption of rifapentine-based regimens. By 2030, the market size could reach USD 1.2 billion, with Priftin capturing an estimated 30-40% share owing to its proven efficacy, safety, and WHO endorsements ([2]).

Emerging markets, especially in Africa, Southeast Asia, and Latin America, are expected to experience the highest growth rates, leveraging public health campaigns and international funding initiatives. The expansion into MDR-TB treatment protocols further widens its market horizon.

Future Market Outlook and Projections

Growth Opportunities

  • Expansion into MDR-TB and Pediatric Markets: As trials confirm safety and efficacy, Priftin’s use in resistant strains and children could significantly boost sales.

  • Combination Therapies: Integration into simplified, all-oral regimens streamlines TB management, appealing to healthcare providers and patients.

  • Global Health Initiatives: Increased funding and policy shifts toward shorter, patient-friendly treatments will underpin sustained demand.

Risks and Uncertainties

  • Regulatory Hurdles: Variations in approval timelines across countries may delay market entry or expansion.

  • Emergence of Resistance: Potential development of rifapentine resistance could diminish long-term utility.

  • Competitive Drugs: New TB pharmaceuticals in advanced stages may erode market share if they demonstrate superior efficacy or safety.

Key Takeaways

  • Clinical Validation: Recent trial data affirm Priftin’s efficacy in preventing and treating TB, notably as a shorter regimen alternative, underpinning its growing clinical value.

  • Expanding Markets: Global TB prevalence, coupled with treatment adherence challenges, positions Priftin favorably, especially in resource-limited settings seeking cost-effective, shorter therapy options.

  • Regulatory and Strategic Movements: Approval in major markets and ongoing trials in MDR-TB and pediatric populations suggest significant growth potential.

  • Market Outlook: The TB drug market is poised for steady expansion, with Priftin poised to command a substantial share driven by clinical validation and international health policies favoring shorter regimens.

  • Risks to Monitor: Regulatory delays, resistance evolution, and competitive advancements could influence market trajectory.

FAQs

1. What are the primary clinical benefits of Priftin over traditional TB therapies?
Priftin enables shorter treatment courses, typically 3-4 months, compared to the traditional 6-9 months, improving adherence, reducing default rates, and mitigating side effects associated with prolonged therapy.

2. Is Priftin effective against multidrug-resistant TB?
Current evidence suggests potential in MDR-TB regimens, but more extensive clinical trials are underway. Its role in resistant strains remains subject to further validation.

3. What are the main challenges in expanding Priftin’s global market?
Challenges include high manufacturing costs, regulatory approval delays in certain regions, pricing barriers, and the emergence of competing therapies.

4. How does Priftin fit within WHO's TB treatment guidelines?
The WHO endorses rifapentine-based regimens, including Priftin, for latent TB infection and preventive therapy, supporting widespread adoption where approved.

5. What future developments could influence Priftin’s market?
Advancements include expanding its indications, development of combination therapies, and integration into national TB control programs, driven by ongoing clinical research and health policy shifts.


Sources

[1] WHO. (2022). Global tuberculosis report 2022. World Health Organization.
[2] MarketsandMarkets. (2022). TB Treatment Market by Type, Application, and Region – Global Forecast to 2030.

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