CClinicalTrials.gg
CompletedNCT00023335Updated Sep 5, 2005

TBTC Study 22: Efficacy of Once-Weekly Rifapentine and Isoniazid in Treatment of Tuberculosis

A Phase 3 interventional study of Rifapentine and Isoniazid in Pulmonary Tuberculosis, sponsored by Centers for Disease Control and Prevention. Completed at 23 sites in 2 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2005-09-05.

Sponsored by Centers for Disease Control and Prevention · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
1,000
Allocation
Randomized
Ages
18 Years and older
Sex
All
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Study summary

Primary Objective: To compare, at the completion of the follow-up phase, the clinical and bacteriologic relapse rates associated with the two study regimens.

Secondary Objectives:

To compare the clinical and bacteriologic failure rates of the two study regimens at the completion of the study phase therapy.

To compare the clinical and bacteriologic response rates for the two study regimens among patients who began study phase therapy with signs and symptoms of tuberculosis or cultures positive for M. tuberculosis.

To compare the toxicity associated with the two study regimens by comparing discontinuation rates due to adverse events and occurrence rates of signs and symptoms associated with adverse events during study phase therapy.

To compare mortality rates of the two study regimens. To compare the rates of completion of therapy within 22 weeks for the two study regimens.

To compare the rate of development of drug-resistant tuberculosis in the two study regimens among study patients classified as treatment failures or relapses.

To compare all of the above performance characteristics for the two study regimens in a small subset of HIV seropositive patients.

To compare attitudes and beliefs about participation in this study between patients who complete study therapy and those who fail to complete study therapy.

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Conditions studied

  • Pulmonary Tuberculosis
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In context

Tuberculosis

1,417 studies on the registry are indexed under Tuberculosis; 208 are open to participants now.

This study's enrollment of 1,000 is above the median of 150 across 952 interventional studies indexed under Tuberculosis.

Browse Tuberculosis studies →

Lead sponsor

Centers for Disease Control and Prevention is the lead sponsor of 273 studies on the registry; 2 are open to participants now.

Of its 11 completed or terminated interventional studies of FDA-regulated products, 8 (73%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

  • Culture-positive, drug-susceptible pulmonary tuberculosis
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Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
1,000 participants

Interventions

  • DrugRifapentine
  • DrugIsoniazid
06

Study locations

23 sites
  • Central Arkansas Veterans Health System
    Little Rock, Arkansas 72205, United States
  • LA County/USC Medical Center
    Los Angeles, California 90033, United States
  • University of California, San Francisco
    San Francisco, California 94110, United States
  • Denver Department of Public Health and Hospitals
    Denver, Colorado 80204, United States
  • Washington, D.C. VAMC
    Washington, District of Columbia 20422, United States
  • Chicago VA Medical Center (Lakeside)
    Chicago, Illinois 60611, United States
  • Hines VA Medical Center
    Hines, Illinois 60141, United States
  • Johns Hopkins University School of Medicine
    Baltimore, Maryland 21287-0003, United States
  • Boston Medical Center
    Boston, Massachusetts 02118, United States
  • New Jersey Medical School
    Newark, New Jersey 07107-3001, United States
  • New York University School of Medicine
    New York, New York 10016, United States
  • Columbia University/Presbyterian Medical Center
    New York, New York 10032, United States
  • Harlem Hospital Center
    New York, New York 10037, United States
  • Carolinas Medical Center
    Charlotte, North Carolina 28203, United States
  • Duke University Medical Center
    Durham, North Carolina 34222, United States
  • Nashville VA Medical Center
    Nashville, Tennessee 37212-2637, United States
  • University of North Texas Health Science Center
    Fort Worth, Texas 76107-2699, United States
  • Thomas Street Clinic
    Houston, Texas 77009, United States
  • Audi L. Murphy VA Hospital
    San Antonio, Texas 78284, United States
  • Seattle King County Health Department
    Seattle, Washington 98104, United States
  • University of British Columbia
    Vancouver, British Columbia Canada V5Z 4R4, Canada
  • University of Manitoba
    Winnipeg, Manitoba CANADA R3A 1R8, Canada
  • Montreal Chest Institute McGill University
    Montreal, Quebec H2X 2P4Pq Canada, Canada
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References and documents

Publications

  • Weiner M, Burman W, Vernon A, Benator D, Peloquin CA, Khan A, Weis S, King B, Shah N, Hodge T; Tuberculosis Trials Consortium. Low isoniazid concentrations and outcome of tuberculosis treatment with once-weekly isoniazid and rifapentine. Am J Respir Crit Care Med. 2003 May 15;167(10):1341-7. doi: 10.1164/rccm.200208-951OC. Epub 2003 Jan 16. PubMed 12531776 ↗
  • Benator D, Bhattacharya M, Bozeman L, Burman W, Cantazaro A, Chaisson R, Gordin F, Horsburgh CR, Horton J, Khan A, Lahart C, Metchock B, Pachucki C, Stanton L, Vernon A, Villarino ME, Wang YC, Weiner M, Weis S; Tuberculosis Trials Consortium. Rifapentine and isoniazid once a week versus rifampicin and isoniazid twice a week for treatment of drug-susceptible pulmonary tuberculosis in HIV-negative patients: a randomised clinical trial. Lancet. 2002 Aug 17;360(9332):528-34. doi: 10.1016/s0140-6736(02)09742-8. PubMed 12241657 ↗
  • Vernon A, Burman W, Benator D, Khan A, Bozeman L. Acquired rifamycin monoresistance in patients with HIV-related tuberculosis treated with once-weekly rifapentine and isoniazid. Tuberculosis Trials Consortium. Lancet. 1999 May 29;353(9167):1843-7. doi: 10.1016/s0140-6736(98)11467-8. PubMed 10359410 ↗
  • Yamshchikov AV, Kurbatova EV, Kumari M, Blumberg HM, Ziegler TR, Ray SM, Tangpricha V. Vitamin D status and antimicrobial peptide cathelicidin (LL-37) concentrations in patients with active pulmonary tuberculosis. Am J Clin Nutr. 2010 Sep;92(3):603-11. doi: 10.3945/ajcn.2010.29411. Epub 2010 Jul 7. PubMed 20610636 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 5, 2005, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00023335
Lead sponsor
Centers for Disease Control and Prevention
Collaborators
US Department of Veterans Affairs
First posted
Sep 10, 2001
Start date
Apr 1995
Completion
Mar 2001
Last update
Sep 5, 2005
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Sep 2005. You cannot join it, but the record below documents what was studied.

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