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rifapentine

Phase 2

Pulmonary Tuberculosis | Small molecule | Infectious Disease |Sanofi|Last Updated: May 5, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment865

FDA Designations

No designations recorded

Clinical trial landscape

rifapentine · 3 trials · 3 indications

Phase 2 1Phase 1 2
NCT00694629TBTC Study 29: Rifapentine During Intensive Phase Tuberculosis (TB) TreatmentPulmonary Tuberculosis
COMPLETED865 Analytics
PHASE2COMPLETED
TBTC Study 29: Rifapentine During Intensive Phase Tuberculosis (TB) Treatment
Pulmonary TuberculosisUnlock trial analytics

Study Endpoints

Primary Endpoints

The proportion of patients, by regimen, having negative sputum cultures at completion of eight weeks (40 doses) of treatment
completion of eight weeks (40 doses) of treatment
The proportion of patients, by regimen, who permanently discontinue the assigned study treatment for any reason during the first eight weeks
during the first eight weeks of treatment
Rifapentine exposure among participants by median area under the curve (AUC)
12 weeks

Target AUC is no more than 25% lower than, and no more than 75% higher than, the target AUC of 522 mcg\*h/L. Data to be used for dose adjustments throughout the study and to create dosing algorithm for pediatric subgroups.

To determine PK parameters Cmax, Cmin and AUC0-24 for efavirenz (EFZ), emtricitabine (EMT) and tenofovir (TDF)
Day-2, Day 1 and Day 21 for cohorts 1 and 3, and on Day -2 ,Day 1 and Day 16 for cohort 2

Secondary Endpoints

time to culture-conversion
2-, 4-, 6-, and 8-week cultures (10, 20, 30, 40 doses)
proportion of patients with any Grade 3 or 4 adverse reactions
8 weeks
correlation of the MGIT/BACTEC liquid culture growth index and other mycobacterial and clinical biomarkers with time to culture conversion and treatment failure
duration of TB treatment
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
1ACTIVE_COMPARATORrifampin, isoniazid, pyrazinamide, ethambutol
2EXPERIMENTALrifapentine 10 mg/kg, isoniazid, pyrazinamide, ethambutol
3EXPERIMENTALrifapentine 15 mg/kg, isoniazid, pyrazinamide, ethambutol
4EXPERIMENTALrifapentine 20 mg/kg, isoniazid, pyrazinamide, ethambutol
Single Arm Rifapentine and IsoniazidEXPERIMENTALSingle arm, open label and exposure-controlled. Intervention is rifapentine given in a new fixed dose combination once-weekly, in combination with isoniazid for 12 weeks, in HIV-infected and HIV-uninfected children aged 0-12 years in whom LTBI treatment is indicated. The protocol allows for parallel enrolment of children into cohorts 1 and 2, simultaneously, using a predetermined modeled initial dose for each cohort, separately. Similarly, cohorts 3 and 4 will be enrolled in parallel, using modeled doses for each cohort, based on data from cohorts 1 and 2 and historical data from TBTC trials.
cohort 1EXPERIMENTALPeriod 1 (15 days) : ATRIPLA™ Period 2 (21 days) : ATRIPLA™ + oral rifapentine (regimen 1).
cohort 2EXPERIMENTALPeriod 1 (15 days) : ATRIPLA™ Period 2 (21 days) : ATRIPLA™ + oral rifapentine (regimen 2).
cohort 3 (optional)EXPERIMENTALPeriod 1 (15 days) : ATRIPLA™ Period 2 (21 days) : ATRIPLA™ + oral rifapentine (regimen 3).

Interventions

NameTypeDescription
rifampinDRUGtablet, 10 mg/kg, daily, 8 weeks
rifapentineDRUGtablet, 10 mg/kg, daily, 8 weeks
IsoniazidDRUGIsoniazid. 25mg/kg
rifapentine (M000473)DRUGPharmaceutical form:tablet Route of administration: oral
EFZ EMT TDFDRUGPharmaceutical form:tablet Route of administration: oral
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites29

Inclusion Criteria: 1. Suspected pulmonary tuberculosis with acid-fast bacilli in a stained smear of expectorated or induced sputum. 2. Willingness to have HIV testing performed, if HIV serostatus is not known or if the last documented negative HIV test was more than 3 months prior to enrollment. 3...

Countries:United StatesBrazilCanadaSouth AfricaSpainUganda
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Frequently asked questions about rifapentine

What is Rifapentine used for?

Rifapentine is a small molecule antibiotic used for Tuberculosis, including latent tuberculosis, pulmonary tuberculosis, and tuberculosis. It is being developed by Sanofi for the treatment of these infectious disease indications.

What does Rifapentine target?

Rifapentine targets the bacterial RNA polymerase, inhibiting mycobacterial protein synthesis. It is used against Mycobacterium tuberculosis, the bacterium that causes tuberculosis.

Who makes Rifapentine?

Rifapentine is developed by Sanofi, a global pharmaceutical company. Sanofi is conducting clinical trials to evaluate the drug's safety and efficacy in treating tuberculosis.

What phase is Rifapentine in?

Rifapentine is in Phase 1 clinical development. It is an investigational drug and has not yet been approved by regulatory authorities. Clinical trials are ongoing to assess its use in tuberculosis.

What clinical trials is Rifapentine in?

Rifapentine has been studied in clinical trials including NCT00694629, a Phase 2 study in pulmonary tuberculosis, and NCT01690403 and NCT03730181, both Phase 1 studies in tuberculosis and latent tuberculosis, respectively.

Is Rifapentine the same as Priftin?

Rifapentine is also known by the brand name Priftin. It is an antibiotic used to treat tuberculosis, and Priftin is the marketed name for the same drug.