A Study to Learn About the Study Medicine Called Prifetrastat in People With Renal Impairment

November 5, 2026 updated by: Pfizer

A PHASE 1, OPEN-LABEL, SINGLE-DOSE, PARALLEL-GROUP STUDY TO EVALUATE THE PHARMACOKINETICS AND SAFETY OF PRIFETRASTAT IN PARTICIPANTS WITH MODERATE AND SEVERE RENAL IMPAIRMENT RELATIVE TO PARTICIPANTS WITH NORMAL RENAL FUNCTION.

The primary purpose of this study is to understand how the body processes the study medicine, called prifetrastat, in people with renal impairment compared to healthy people with normal kidney function. Renal impairment means that a person has worse kidney function than normal. The study will also look at the safety and tolerability of prifetrastat in people with renal impairment compared to healthy people with normal kidney function.

This study is seeking participants who:

  • Have moderate or severe renal impairment or
  • Healthy people with normal kidney function

All participants in this study will receive a single dose of prifetrastat. The study medicine will be given by mouth at the study clinic. We will compare experiences of people with renal impairment and healthy people with normal kidney function.

Participants will take part in this study for about 2 months. During this time, they will stay at the study clinic for 8 to 16 days.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
24

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • United States
    • Florida
      • Miami Lakes, Florida, United States, 33016
        • Floridian Clinical Research
      • Tampa, Florida, United States, 33603
        • Genesis Clinical Research, LLC
    • Minnesota
      • Saint Paul, Minnesota, United States, 55114
        • Nucleus Network Minneapolis

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 90 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria

  • Female of nonchildbearing potential or males, 18 to 90 years of age at screening.
  • Body mass index (BMI) of 16-40 kg/m2; and a total body weight >50 kg (110 lb).
  • Stable renal function that matches the classification of either moderate renal impairment, severe renal impairment, or normal renal function.

Exclusion Criteria

  • Any condition possibly affecting drug absorption
  • Acute renal disease
  • Renal allograft recipient
  • Renal transplant recipient
  • Urinary incontinence without catheterization
  • Current use of any prohibited concomitant medication(s)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

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

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Moderate Renal Impairment (Cohort 1)

Prifetrastat administered by mouth as a single dose in participants with moderate renal impairment (eGFR = 30-59 mL/min).
Drug: Prifetrastat

Prifetrastat administered by mouth as a single dose.

Other Names:
  • PF-07248144
Experimental: Severe Renal Impairment (Cohort 2)

Prifetrastat administered by mouth as a single dose in participants with severe renal impairment (eGFR < 30 mL/min).
Drug: Prifetrastat

Prifetrastat administered by mouth as a single dose.

Other Names:
  • PF-07248144
Active Comparator: Normal Renal Function (Cohort 3)

Prifetrastat administered by mouth as a single dose in participants with normal renal function (eGFR ≥ 90 mL/min).
Drug: Prifetrastat

Prifetrastat administered by mouth as a single dose.

Other Names:
  • PF-07248144

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf) of Prifetrastat
Time Frame: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, 216, 264, 312, and 360 hours post-dose
Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, 216, 264, 312, and 360 hours post-dose
Maximum Observed Plasma Concentration (Cmax) of Prifetrastat
Time Frame: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, 216, 264, 312, and 360 hours post-dose
Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, 216, 264, 312, and 360 hours post-dose

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Number of Treatment-Emergent Adverse Events (AE) by Severity
Time Frame: From Baseline through follow-up, up to 35 days after last dose of study drug
From Baseline through follow-up, up to 35 days after last dose of study drug
Number of Participants With Clinically Significant Clinical Laboratories Abnormalities
Time Frame: From Baseline through follow-up, up to 35 days after last dose of study drug
From Baseline through follow-up, up to 35 days after last dose of study drug
Number of Participants With Clinically Significant Change From Baseline in Blood Pressure or Heart Rate
Time Frame: From Baseline up to Day 16
From Baseline up to Day 16
Number of Participants With Abnormalities in Physical Examination
Time Frame: From Baseline up to Day 16
From Baseline up to Day 16
Number of Participants With Clinically Significant Change in Electrocardiogram (ECG) Findings
Time Frame: From Baseline up to Day 16
From Baseline up to Day 16

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Pfizer

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Pfizer CT.gov Call Center, Pfizer

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 17, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
May 21, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 27, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 5, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 5, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 12, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 12, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 5, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • C4551013

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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