Pretomanid in Adults With Hepatic Impairment

A Phase I, Single Dose, Open-Label Study Comparing the Pharmacokinetics and Safety of Pretomanid in Subjects With Mild, Moderate, and Severe Hepatic Impairment to Matched, Non-Hepatically Impaired Subjects

This is a Phase 1, single dose (200 mg), open-label study comparing the pharmacokinetics and safety of Pretomanid in subjects with mild, moderate, and severe hepatic impairment to matched, non-hepatically impaired subjects. There will be approximately 36 total subjects, adult males and females, 18 to 70 years of age, inclusive. The study will be conducted at 2 sites, study duration is approximately 24 months, and subject participation duration is approximately 5 weeks (including screening). Primary objective: To evaluate the pharmacokinetics of a single oral dose of Pretomanid in subjects with mild, moderate, and severe hepatic impairment (as assessed by Child-Pugh score), relative to matched non-hepatically impaired subjects. Secondary objective: To evaluate the safety of a single oral dose of Pretomanid in subjects with mild, moderate, and severe hepatic impairment (as assessed by Child-Pugh score), relative to matched non-hepatically impaired subjects.

Study Overview

• Status: Terminated
• Conditions: Tuberculosis
• Intervention / Treatment: Drug: PA-824

Detailed Description

This is a Phase 1, single dose (200 mg), open-label study comparing the pharmacokinetics and safety of Pretomanid in subjects with mild, moderate, and severe hepatic impairment to matched, non-hepatically impaired subjects. This study will enroll approximately 6 subjects with mild hepatic impairment (Child-Pugh A), approximately 6 subjects with moderate hepatic impairment (Child-Pugh B), approximately 6 subjects with severe hepatic impairment (Child-Pugh C), and approximately 18 matched non-hepatically impaired subjects. Non-hepatically impaired subjects in the control group will be matched to subjects with hepatic impairment based on age (+/- 10 years) and body weight (+/- 20 percent) as measured at screening (Visit 00A). There will be approximately 36 total subjects, adult males and females, 18 to 70 years of age, inclusive. The study will be conducted at 2 sites, study duration is approximately 24 months, and subject participation duration is approximately 5 weeks (including screening). Primary objective: To evaluate the pharmacokinetics of a single oral dose of Pretomanid in subjects with mild, moderate, and severe hepatic impairment (as assessed by Child-Pugh score), relative to matched non-hepatically impaired subjects. Secondary objective: To evaluate the safety of a single oral dose of Pretomanid in subjects with mild, moderate, and severe hepatic impairment (as assessed by Child-Pugh score), relative to matched non-hepatically impaired subjects.

• Study Type: Interventional
• Enrollment (Actual): 14
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Missouri
    • Saint Louis, Missouri, United States, 63104-1015
      • Saint Louis University Center for Vaccine Development
  • North Carolina
    • Durham, North Carolina, United States, 27710-4000
      • Duke University School of Medicine - Duke Clinical Research Institute - Duke Clinical Research Unit

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 70 years (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

Inclusion Criteria for Patients with Hepatic Impairment (Groups 1-3):

1. Subject is able to give voluntary written informed consent before any study related procedure is performed.
2. 18-70 years of age, inclusive.

3. Acceptable laboratory values* obtained at screening (within 21 days prior to admission to the confinement/hospital unit) and either at or within 72 hours of admission to the confinement/hospital unit.

   *Chemistry, complete blood count, Aspartate Aminotransferase (AST), Alanine Aminotransferase (ALT), total bilirubin, alkaline phosphatase, albumin, and urinalysis deemed not clinically significant by the investigator.

4. Hepatic impairment classified as Child-Pugh class A (mild), B (moderate), or C (severe) criteria at screening for Groups 1, 2, or 3, respectively, and documented evidence of hepatic cirrhosis*.

   *by biopsy, nuclear scan, CT, MRI, ultrasound, or other clinically acceptable methods

5. If female, not of childbearing potential* or agrees to avoid becoming pregnant by using acceptable contraception** during the duration of the study.

   *Non-childbearing potential is defined as being post-menopausal for at least 2 years, status after bilateral oophorectomy or status after hysterectomy.

   • Females of childbearing potential must agree to use two acceptable methods of contraceptives: bilateral tubal ligation; barrier method (condom) by the male partner (even if vasectomized); hormonal contraceptives; intrauterine contraceptive devices; diaphragm in combination with contraceptive jelly, cream, foam, or spermicide; and abstinence from sexual intercourse with men.

6. If subject is male and capable of reproduction, agrees to avoid fathering a child for three months after dosing by using an acceptable method of birth control*.

   *In addition to the use of a barrier method (condom) even if vasectomized, acceptable methods of birth control are restricted to a monogamous relationship with a woman who agrees to use acceptable contraception as outlined in inclusion criterion #5, and abstinence from sexual intercourse with women.

7. If the subject is female, a negative serum pregnancy test at screening and a negative urine pregnancy test at admission to the confinement/hospital unit.
8. Willingness to comply with all protocol requirements.

Inclusion Criteria for Non-Hepatically Impaired Controls (Group 4):

1. Subject is able to give voluntary written informed consent before any study related procedure is performed.
2. 18-70 years of age, inclusive.
3. Subject is a healthy volunteer as determined by no clinically significant findings from medical history, physical examination, vital signs, and 12-lead ECG as determined by the Site Investigator.

4. Acceptable laboratory values* obtained at screening (within 21 days prior to admission to the confinement/hospital unit) and either at or within 72 hours of admission to the confinement/hospital unit.

   *Chemistry, complete blood count, Aspartate Aminotransferase (AST), Alanine Aminotransferase (ALT), total bilirubin, alkaline phosphatase, albumin, and urinalysis within the reference range for the test laboratory, unless deemed not clinically significant by the investigator.

5. If female, not of childbearing potential* or agrees to avoid becoming pregnant by using acceptable contraception** during the duration of the study.

   *Non-childbearing potential is defined as being post-menopausal for at least 2 years, status after bilateral oophorectomy or status after hysterectomy.

   **Females of childbearing potential must agree to use two acceptable methods of contraceptives: bilateral tubal ligation; barrier method (condom) by the male partner (even if vasectomized); hormonal contraceptives; intrauterine contraceptive devices; diaphragm in combination with contraceptive jelly, cream, foam, or spermicide; and abstinence from sexual intercourse with men.

6. If subject is male and capable of reproduction, agrees to avoid fathering a child for three months after dosing by using an acceptable method of birth control*.

   *In addition to the use of a barrier method (condom) even if vasectomized, acceptable methods of birth control are restricted to a monogamous relationship with a woman who agrees to use acceptable contraception as outlined in inclusion criterion #5, and abstinence from sexual intercourse with women.

7. If the subject is female, a negative serum pregnancy test at screening and a negative urine pregnancy test at admission to the confinement/hospital unit.
8. Willingness to comply with all protocol requirements.

Exclusion Criteria:

Exclusion Criteria for Patients with Hepatic Impairment (Groups 1-3):

1. Hypokalemia (< 3.5mEq/L), severe hypomagnesemia (< 1.1 mg/dL) or severe hypocalcemia (< 7.5 mg/dL).
2. Aspartate Aminotransferase (AST) or Alanine Aminotransferase (ALT) > 10 times the upper limit of normal.
3. Creatinine clearance < 60 ml/min.
4. Inability to swallow tablets.

5. Presence of any condition or finding* which would jeopardize subject safety, impact study result validity, or diminish the subject's ability to undergo all study procedures and assessments**.

   *in the opinion of the site investigator

   **e.g., inability to draw Pharmacokinetics (PK) samples

6. History of fever or documented fever (oral temperature > / = 100.4 degrees F or > / = 38.0 degrees C) in the 48 hours prior to admission to the the confinement/hospital unit.
7. Currently breastfeeding.
8. History of chronic tobacco/nicotine use (> 10 cigarettes per day for 3 months minimum prior to admission).
9. History of clinically significant allergy or severe side effects with nitroimidazoles (e.g., Metronidazole and related substances and azole antifungals or aromatase inhibitors).
10. Receipt of an investigational drug, vaccine or biologic in a clinical trial within 30 days prior to screening.

11. Use of any over the counter (OTC) medication* within 7 days prior to admission to the confinement/hospital unit, unless** the substance would not likely impact the validity of the study results.

    *including vitamins and herbal supplements, cough and cold medications.

    **in the opinion of the site investigator

12. Treatment with CYP450 enzyme altering drugs* within 7 days prior to admission to the confinement/hospital unit, unless** the substance would not likely impact the validity of the study results.

    • except hormonal contraceptives

      • in the opinion of the site investigator NOTE: See list of CYP450 enzyme altering drugs under the concomitant medications section.
13. A positive blood screen for HIV.

14. A positive alcohol breath test (or other suitable test for alcohol) or a urine screen test for drugs of abuse* at screening and at admission to the confinement/hospital unit.

    *Amphetamines, barbiturates, cocaine metabolites, marijuana, opiates, phencyclidine (PCP).

    NOTE: Results of the urine screen test can be ignored if in the opinion of the PI the results can be explained by the concomitant medications history.

15. Unwillingness to abstain from engaging in strenuous physical activity (e.g. running, bicycling, weightlifting, competitive sports) during the course of the study.
16. Consumption of grapefruit juice in the 48 hours before admission to the confinement/hospital unit, or the inability to abstain from these until completion of Day 12.
17. A Heart Rate-Corrected QT Interval (Fridericia's Formula) (QTcF) interval > 450 msec (males) or > 450 msec (females) at screening (Visit 00A) or admission to the confinement/hospital unit (Visit 00B) or a history of prolonged QTc interval.

18. A family history* of Long QT Syndrome, premature cardiac death**, or sudden death without a preceding diagnosis of a condition*** that could be causative of sudden death.

    *parents

    **due to ischemic heart disease or sudden cardiac death before 55 years of age (men) or 65 years of age (women)

    ***such as known coronary artery disease, congestive heart failure, or terminal cancer

19. Any clinically significant ECG abnormality, in the opinion of the site investigator, at screening and at admission to the confinement/hospital unit.
20. Donation of > 500 mL blood within the 30 days prior to admission to the confinement/hospital unit.
21. Plans to donate blood during the study or up to 14 days after dosing.
22. Persons with a transjugular intrahepatic portosystemic shunt.

Exclusion Criteria for Non-Hepatically Impaired Controls (Group 4):

1. Inability to swallow tablets.

2. Presence of any condition or finding* which would jeopardize subject safety, impact study result validity, or diminish the subject's ability to undergo all study procedures and assessments**.

   *in the opinion of the site investigator

   **e.g., inability to collect Pharmacokinetics (PK) samples

3. History of fever or documented fever (oral temperature > / = 100.4 degrees F or > / = 38.0 degrees C) in the 48 hours prior to admission to the confinement/hospital unit.
4. Currently breastfeeding.
5. History of chronic tobacco/nicotine use (> 10 cigarettes per day for 3 months minimum prior to admission to the confinement/hospital unit).
6. History of seizures (other than febrile seizures during childhood) or known or suspected Central Nervous System (CNS) disorders that may predispose to seizures.
7. History of clinically significant allergy or severe side effects with nitroimidazoles (e.g., Metronidazole and related substances and azole antifungals or aromatase inhibitors).
8. Receipt of an investigational drug, vaccine or biologic in a clinical trial within 30 days prior to screening.

9. Use of any over the counter (OTC) medication* within 7 days prior to admission to the confinement/hospital unit, unless** the substance would not likely impact the validity of the study results.

   *including vitamins and herbal supplements, antacids, cough and cold medications.

   **in the opinion of the site investigator

10. Use of prescription medication except hormonal contraceptives within 30 days prior to admission to the confinement/hospital unit, unless* the substance would not likely impact study result validity.

    *in the opinion of the site investigator

11. Treatment with CYP450 enzyme altering drugs* within 7 days prior to admission to the confinement/hospital unit, unless** the substance would not likely impact the validity of the study results.

    *except hormonal contraceptives

    **in the opinion of the site investigator NOTE: See list of CYP450 enzyme altering drugs under the concomitant medications section.

12. A positive blood screen for HIV.
13. A positive blood screen for hepatitis B surface antigen (HBsAg), or hepatitis C antibody.

14. A positive alcohol breath test (or other suitable test for alcohol) or a urine screen test for drugs of abuse* at screening and at admission to the confinement/hospital unit.

    *Amphetamines, barbiturates, benzodiazepines, cocaine metabolites, marijuana, opiates, phencyclidine (PCP).

15. A history of alcohol abuse or dependence within the past 1 month prior to admission to the confinement/hospital unit.
16. Unwillingness to abstain from engaging in strenuous physical activity (e.g. running, bicycling, weightlifting, competitive sports) during the course of the study.
17. Consumption of grapefruit juice in the 48 hours before admission to the confinement/hospital unit, or the inability to abstain from these until completion of Day 12.
18. A Heart Rate-Corrected QT Interval (Fridericia's Formula) (QTcF) interval > 450 msec (males) or > 450 msec (females) at screening (Visit 00A) or admission to the confinement/hospital unit (Visit 00B) or a history of prolonged QTc interval.

19. A family history* of Long QT Syndrome, premature cardiac death**, or sudden death without a preceding diagnosis of a condition*** that could be causative of sudden death.

    *parents

    **due to ischemic heart disease or sudden cardiac death before 55 years of age (men) or 65 years of age (women)

    ***such as known coronary artery disease, congestive heart failure, or terminal cancer

20. Any clinically significant ECG abnormality, in the opinion of the site investigator, at screening and at admission to the confinement/hospital unit.
21. Donation of > 500 mL of blood within the 30 days prior to admission to the confinement/hospital unit.
22. Plans to donate blood during the study or up to 14 days after dosing.
23. Persons with a transjugular intrahepatic portosystemic shunt.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Child-Pugh A (Mild hepatic impairment); 6 Subjects will receive a single oral dose of 200mg Pretomanid tablets on day 1	Drug: PA-824; Pretomanid (PA-824) is a nitroimidazooxazine. All subjects will receive a single oral dose of 200 mg Pretomanid on day 1.
Experimental: Child-Pugh B (Moderate hepatic impairment); 6 Subjects will receive a single oral dose of 200mg Pretomanid tablets on day 1	Drug: PA-824; Pretomanid (PA-824) is a nitroimidazooxazine. All subjects will receive a single oral dose of 200 mg Pretomanid on day 1.
Experimental: Child-Pugh C (Severe hepatic impairment); 6 Subjects will receive a single oral dose of 200mg Pretomanid tablets on day 1	Drug: PA-824; Pretomanid (PA-824) is a nitroimidazooxazine. All subjects will receive a single oral dose of 200 mg Pretomanid on day 1.
Experimental: Non-hepatically impaired controls; 18 matched Subjects will receive a single oral dose of 200mg Pretomanid tablets on day 1	Drug: PA-824; Pretomanid (PA-824) is a nitroimidazooxazine. All subjects will receive a single oral dose of 200 mg Pretomanid on day 1.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
AUC(0-infinity): Area Under the Concentration Time-curve Extrapolated to Infinity at Specified Pre-dose and Post-dose Time Points	AUC(0-infinity) was calculated by noncompartmental analysis using the linear up log down method with the area extrapolated to infinity as Clast/Lambda_z where Clast was the last observed concentration and Lambda_z is the elimination rate constant.	Day 1 to Day 5
AUC(0-last): Area Under the Concentration Time-curve to the Last Concentration Above the Lower Limit of Quantitation at Specified Pre-dose and Post-dose Time Points	AUC(0-last) Area under the concentration time-curve to the last concentration above the lower limit of quantitation at specified pre-dose and post-dose time points was calculated by noncompartmental analysis using the linear up log down method.	Day 1 to Day 5
CL/F: Apparent Oral Clearance Calculated From Dose/AUC(0-infinifty) at Specified Pre-dose and Post-dose Time Points	Apparent oral clearance was calculated by noncompartmental analysis using the formula Dose/AUC(0-infinity).	Day 1 to Day 5
Cmax: Maximum Pretomanid Concentration at Specified Pre-dose and Post-dose Time Points	Maximum Pretomanid concentration is the maximum observed drug concentration in blood plasma at specified pre-dose and post-dose timepoints.	Day 1 to Day 5
t(1/2): Apparent Terminal Elimination Half-life at Specified Pre-dose and Post-dose Time Points	Apparent terminal half-life at specified pre-dose and post-dose timepoints was estimated by ln(2)/Lambda_z, where Lambda_z is the elimination rate constant.	Day 1 to Day 5
Tmax: Time of Maximum Pretomanid Concentration at Specified Pre-dose and Post-dose Time Points	Time of maximum Pretomanid concentration (Tmax) at specified pre-dose and post-dose timepoints.	Day 1 to Day 5
Vd/F: Apparent Volume of Distribution at Specified Pre-dose and Post-dose Time Points	Apparent Volume of Distribution at specified pre-dose and post-dose timepoints is the volume that the total amount of administered drug would occupy to provide the same concentration as it currently is in blood plasma divided by the bioavailability. It is calculated by Dose/[Lambda_z x AUC(0-infinity)]	Day 1 to Day 5

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Incidence and Severity of Related Adverse Events	Events were determined to be related if there was a reasonable possibility that the study product caused the adverse event (AE); that is, there was evidence to suggest a causal relationship between the study product and the AE. Each event was graded as mild, moderate or severe. Participants are counted according to their maximum severity of the event reported.	Day 1 to Day 12
Incidence and Severity of Serious Adverse Events	A serious adverse event (SAE) is any adverse event occurring at any dose and regardless of causality that: results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant incapacity or substantial disruption of the ability to conduct normal life functions, is a congenital anomaly or birth defect in an offspring of a subject taking study drug, or is an important medical event.	Day 1 to Day 12
Number of Participants With Abnormal ECG Data	ECG data was collected, including PR interval, QRS duration, QT Interval, QTc interval, RR interval, and Ventricular rate. Abnormal ECG data was evaluated for clinical significance.	Day 12
Number of Participants With Abnormal Physical Exam Findings	Summary of physical examination findings were obtained from a comprehensive physical examination including the following body system assessments: skin; head, eyes, ears, nose, and throat; thyroid; neurological; chest and lungs; cardiovascular; abdomen (liver and spleen); lymph nodes; musculoskeletal, and extremities.	Day 3, 4, 5 and 12
Number of Participants With Abnormal Safety Laboratory Parameters	Summary of abnormal laboratory parameters were collected following dose of study product through day 12. Abnormal findings were evaluated based on relationship to study product and clinical significance.	Day 2, 5, and 12
Number of Participants With Abnormal Vital Signs	Vital signs were collected at each study visit following study product administration. Abnormal vital signs were graded as mild, moderate or severe.	Days 1, 2, 3, 4, 5, and 12

Collaborators and Investigators

• Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)

Study record dates

Study Major Dates

• Study Start (Actual): March 29, 2018
• Primary Completion (Actual): August 26, 2023
• Study Completion (Actual): November 17, 2023

Study Registration Dates

• First Submitted: April 16, 2015
• First Submitted That Met QC Criteria: April 16, 2015
• First Posted (Estimated): April 21, 2015

Study Record Updates

• Last Update Posted (Actual): June 10, 2025
• Last Update Submitted That Met QC Criteria: May 29, 2025
• Last Verified: December 14, 2017

More Information

Terms related to this study

• Keywords: Safety; Pharmacokinetics; Tuberculosis; Hepatic; PA-824; impairment
• Additional Relevant MeSH Terms: Infections; Gram-Positive Bacterial Infections; Bacterial Infections; Bacterial Infections and Mycoses; Actinomycetales Infections; Mycobacterium Infections; Tuberculosis
• Other Study ID Numbers: 13-0053; HHSN272201300017I

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No