HIV InfectionsPhase 2/3NCT00023348
TBTC Study 23A: Pharmacokinetics of Intermittent Isoniazid and Rifabutin in HIV-TB
A Phase 2/3 study testing Isoniazid and Rifabutin in people with HIV Infections and Tuberculosis, run by Centers for Disease Control and Prevention at 23 sites in 2 countries.
Trial summary
Primary Objectives: 1) To determine the proportion of patients with HIV-related tuberculosis who have abnormal pharmacokinetic parameters for isoniazid and rifabutin. Secondary Objectives: 1. To determine risk factors for abnormal pharmacokinetic parameters for isoniazid and rifabutin. 2. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- HIV Infections, Tuberculosis
- What is being tested?
- Isoniazid and Rifabutin
- How many people
- 150 participants
- Where
- 23 sitesin 2 countries
- Study dates
- Jul 1999to Nov 2002
- Phase
- Phase 2/3
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patient enrolled in TBTC Study 23
- Informed consent
Who cannot join
- 1. Severe anemia (Hct <25%)
Trial locations and contacts
23 sites in 2 countries.
23 sites in 2 countries
United States20 sites
Johns Hopkins University School of Medicine
Baltimore, Maryland, 21287-0003
Boston Medical Center
Boston, Massachusetts, 02118
Carolinas Medical Center
Charlotte, North Carolina, 28203
Chicago VA Medical Center (Lakeside)
Chicago, Illinois, 60611
Denver Department of Public Health and Hospitals
Denver, Colorado, 80204
Duke University Medical Center
Durham, North Carolina, 34222
University of North Texas Health Science Center
Fort Worth, Texas, 76107-2699
Hines VA Medical Center
Hines, Illinois, 60141
Thomas Street Clinic
Houston, Texas, 77009
Central Arkansas Veterans Health System
Little Rock, Arkansas, 72205
LA County/USC Medical Center
Los Angeles, California, 90033
Nashville VA Medical Center
Nashville, Tennessee, 37212-2637
New York University School of Medicine
New York, New York, 10016
Columbia University/Presbyterian Medical Center
New York, New York, 10032
Harlem Hospital Center
New York, New York, 10037
New Jersey Medical School
Newark, New Jersey, 07107-3001
Audi L. Murphy VA Hospital
San Antonio, Texas, 78284
University of California, San Francisco
San Francisco, California, 94110
Seattle King County Health Department
Seattle, Washington, 98104
Washington, D.C. VAMC
Washington D.C., District of Columbia, 20422
Canada3 sites
Montreal Chest Institute McGill University
Montreal, Quebec, H2X 2P4Pq Canada
University of British Columbia
Vancouver, British Columbia, Canada V5Z 4R4
University of Manitoba
Winnipeg, Manitoba, CANADA R3A 1R8
About this study
Official title: TBTC Study 23A: Pharmacokinetics of Intermittent Isoniazid and Rifabutin in USPHS Study 23: Treatment of HIV-Related Tuberculosis Using a Rifabutin-Based Regimen
Primary Objectives:
- To determine the proportion of patients with HIV-related tuberculosis who have abnormal pharmacokinetic parameters for isoniazid and rifabutin.
Secondary Objectives:
- To determine risk factors for abnormal pharmacokinetic parameters for isoniazid and rifabutin.
- To evaluate the correlation between pharmacokinetic parameters of isoniazid and rifabutin and the occurrence of toxicity attributed to antituberculous therapy.
- To evaluate the correlation between pharmacokinetic parameters of isoniazid and rifabutin and the efficacy of TB therapy.
- To define and correlate phenotypic INH acetylator status with the results of genotypic acetylator data obtained in the parent trial.
Read the detailed description
This study will seek to enroll every eligible patient enrolled in TBTC Study 23. Consenting patients will be asked to undergo measurements of isoniazid (if receiving), rifabutin and 25-OH desacetyl rifabutin levels at a time point in the study when steady state rifabutin levels are expected to have been achieved (at least two weeks following the start of rifabutin).
- Conditions
- HIV Infections, Tuberculosis
- Being tested
- Isoniazid, Rifabutin
- Keywords
- Tuberculosis, TB
- Medical subject headings
- HIV Infections, Tuberculosis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
IsoniazidDrug
RifabutinDrug
What is being measured
The primary outcome is the main question the study is designed to answer.
To determine the proportion of patients with HIV-related tuberculosis who have abnormal pharmacokinetics of isoniazid and rifabutin.
Secondary outcomes (4)
1) To determine risk factors for abnormal pharmacokinetics of isoniazid and rifabutin
2) To evaluate the correlation between pharmacokinetic parameters of isoniazid and rifabutin and the occurrence of toxicity attributed to antituberculous therapy.
3) To evaluate the correlation between pharmacokinetic parameters of isoniazid and rifabutin and the efficacy of TB therapy.
4) To define and correlate phenotypic INH acetylator status with the results of genotypic acetylator data obtained in the parent trial.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted10 Sep 2001 (estimated)
- Study startJul 1999
- Study completionNov 2002
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for HIV InfectionsStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2/3
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 150 participants
Sponsor and investigators
- Lead sponsor
- Centers for Disease Control and Prevention
- Sponsor type
- US federal agency
- Collaborators
- US Department of Veterans Affairs
- Investigators
- Marc Weiner, MD, Principal investigator, Audie L. Murphy VA Medical Center, San Antonio TX
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00023348
- Sponsor's protocol ID
- CDC-NCHSTP-2173
- Other IDs
- 23A
- Status last verified
- Sep 2005
- First submitted
- 6 Sep 2001
- Last updated
- 13 Sep 2005
- Results posted
- No
Publications
Weiner M, Benator D, Burman W, Peloquin CA, Khan A, Vernon A, Jones B, Silva-Trigo C, Zhao Z, Hodge T; Tuberculosis Trials Consortium. Association between acquired rifamycin resistance and the pharmacokinetics of rifabutin and isoniazid among patients with HIV and tuberculosis. Clin Infect Dis. 2005 May 15;40(10):1481-91. doi: 10.1086/429321. Epub 2005 Apr 14.
PubMed 15844071
Study at a glance
From the registry record, last updated by the sponsor on 13 Sep 2005. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- TBTC Study 23A: Pharmacokinetics of Intermittent Isoniazid and Rifabutin in USPHS Study 23: Treatment of HIV-Related Tuberculosis Using a Rifabutin-Based Regimen
- ClinicalTrials.gov ID
- NCT00023348
- Acronym / sponsor ID
- CDC-NCHSTP-2173
- Conditions
- HIV Infections, Tuberculosis
- Keywords
- Tuberculosis, TB
- Phase
- Phase 2/3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 150 participants
- Lead sponsor
- Centers for Disease Control and PreventionUS federal agency
- Collaborators
- US Department of Veterans Affairs
- Study start
- Jul 1999
- Study completion
- Nov 2002
- First posted
- 10 Sep 2001 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Primary Objectives:
- To determine the proportion of patients with HIV-related tuberculosis who have abnormal pharmacokinetic parameters for isoniazid and rifabutin.
Secondary Objectives:
- To determine risk factors for abnormal pharmacokinetic parameters for isoniazid and rifabutin.
- To evaluate the correlation between pharmacokinetic parameters of isoniazid and rifabutin and the occurrence of toxicity attributed to antituberculous therapy.
- To evaluate the correlation between pharmacokinetic parameters of isoniazid and rifabutin and the efficacy of TB therapy.
- To define and correlate phenotypic INH acetylator status with the results of genotypic acetylator data obtained in the parent trial.
Detailed description
This study will seek to enroll every eligible patient enrolled in TBTC Study 23. Consenting patients will be asked to undergo measurements of isoniazid (if receiving), rifabutin and 25-OH desacetyl rifabutin levels at a time point in the study when steady state rifabutin levels are expected to have been achieved (at least two weeks following the start of rifabutin).
Study design
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Patient enrolled in TBTC Study 23
- Informed consent
Key exclusion criteria (1 listed)
- 1. Severe anemia (Hct <25%)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Isoniazid | Drug | – |
| Rifabutin | Drug | – |
Primary outcome
To determine the proportion of patients with HIV-related tuberculosis who have abnormal pharmacokinetics of isoniazid and rifabutin.
4 secondary outcomes
1) To determine risk factors for abnormal pharmacokinetics of isoniazid and rifabutin
2) To evaluate the correlation between pharmacokinetic parameters of isoniazid and rifabutin and the occurrence of toxicity attributed to antituberculous therapy.
3) To evaluate the correlation between pharmacokinetic parameters of isoniazid and rifabutin and the efficacy of TB therapy.
4) To define and correlate phenotypic INH acetylator status with the results of genotypic acetylator data obtained in the parent trial.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 13 Sep 2005.
- Results publication: PubMed 15844071Weiner M, Benator D, Burman W, Peloquin CA, Khan A, Vernon A, Jones B, Silva-Trigo C, Zhao Z, Hodge T; Tuberculosis Trials Consortium. Association between acquired rifamycin resistance and the pharmacokinetics of rifabutin and isoniazid among patients with HIV and tuberculosis. Clin Infect Dis. 2005 May 15;40(10):1481-91. doi: 10.1086/429321. Epub 2005 Apr 14.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Marc Weiner, MD principal investigator
Audie L. Murphy VA Medical Center, San Antonio TX
23 sites in 2 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2/3 study testing Isoniazid and Rifabutin in people with HIV Infections and Tuberculosis, run by Centers for Disease Control and Prevention at 23 sites in 2 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 13 Sep 2005. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 23 sites in United States, Canada. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this combined phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
To determine the proportion of patients with HIV-related tuberculosis who have abnormal pharmacokinetics of isoniazid and rifabutin.. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00023348, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 Sep 2005.