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Isoniazid

Phase 3

Tuberculosis | Small molecule | Infectious Disease |United Therapeutics Corporation|Last Updated: Jun 1, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment860

FDA Designations

No designations recorded

Clinical trial landscape

Isoniazid · 1 trial · 4 indications

Phase 3 1
NCT06253715Shortened Regimen for Drug-susceptible TB in ChildrenTuberculosis
RECRUITING860 Analytics
PHASE3RECRUITING
Shortened Regimen for Drug-susceptible TB in Children
TuberculosisUnlock trial analytics

Study Endpoints

Primary Endpoints

TB disease-free survival at 48-weeks
Measured from study entry through week 48

Non-inferiority will be assessed by comparing the upper bound of a 95%, 2-sided confidence interval for the difference between the proportion of participants who are classified as having an unsuccessful outcome on the control regimen (HRZ(E)) and the intervention regimen (HPZM) to the predefined non-inferiority margin of 6% at 48 weeks.

Proportion of participants with grade 3 or higher adverse events over 28 weeks
Measured from study entry through Week 28

The proportion of participants with a Grade 3 or higher adverse event and the corresponding 95% confidence intervals will be generated. An exact test for equality of proportions will be used to compare safety outcomes between the arms.

Secondary Endpoints

TB disease-free survival at 48-weeks
Measured from study entry through Week 48
TB disease-free survival at 72-weeks
Measured from study entry through Week 72
Adherence to treatment regimens
Measured from study entry through Week 48
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Regimen 1: Isoniazid (H), Rifampin (R), Pyrazinamide (Z), Ethambutol (E)ACTIVE_COMPARATOR8 weeks of daily HRZ(E) followed by either 16 or 24 weeks of daily HR, per local standard of care
Regimen 2: Isoniazid (H), Rifapentine (P), Pyrazinamide (Z), Moxifloxacin (M)EXPERIMENTAL8 weeks of daily HPZM

Interventions

NameTypeDescription
IsoniazidDRUGOnce daily weight-based dose
RifampinDRUGOnce daily weight-based dose
PyrazinamideDRUGOnce daily weight-based dose
EthambutolDRUGOnce daily weight-based dose
RifapentineDRUGOnce daily weight-based dose
MoxifloxacinDRUGOnce daily weight-based dose
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Eligibility Criteria

Age Range0 Days to 9 Years
SexALL
Healthy VolunteersNo
Study Sites9

Inclusion Criteria: * Parent or guardian is willing and able to provide written informed consent for potential participant's study participation; in addition, when applicable per Ethics Committee/Institutional Review Board (EC/IRB) policies and procedures, potential participant is willing and able ...

Countries:IndiaIndonesiaMozambiqueSouth AfricaUgandaZambiaZimbabwe
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Competitive Landscape -Tuberculosis 7 trials

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Frequently asked questions about Isoniazid

What is Isoniazid used for?

Isoniazid is used for the treatment of tuberculosis, including pulmonary and lymph node tuberculosis caused by Mycobacterium tuberculosis. It is being studied as part of a shortened regimen for drug-susceptible TB in children.

Who makes Isoniazid?

Isoniazid is being developed by United Therapeutics Corporation, a company traded on the NASDAQ under the ticker symbol UTHR.

What phase is Isoniazid in?

Isoniazid is in Phase 3 clinical development. It is an investigational drug and has not been approved by the FDA for the studied indication.

What clinical trials is Isoniazid in?

Isoniazid is being evaluated in a Phase 3 trial with the identifier NCT06253715, titled 'Shortened Regimen for Drug-susceptible TB in Children'. The trial is recruiting and aims to enroll 860 participants across countries including India, Indonesia, Mozambique, South Africa, Uganda, Zambia, and Zimbabwe.

Is Isoniazid a small molecule?

Yes, Isoniazid is a small molecule therapeutic. It is being studied in an active-controlled, randomized Phase 3 trial that uses a biomarker-selected approach for patient enrollment.