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

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

24

Phase

  • 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 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

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
Intervention / Treatment
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

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

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

Pfizer

Investigators

  • 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)

November 17, 2026

Primary Completion (Estimated)

May 21, 2028

Study Completion (Estimated)

May 27, 2028

Study Registration Dates

First Submitted

November 5, 2026

First Submitted That Met QC Criteria

November 5, 2026

First Posted (Actual)

November 12, 2026

Study Record Updates

Last Update Posted (Actual)

November 12, 2026

Last Update Submitted That Met QC Criteria

November 5, 2026

Last Verified

November 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID 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.

Subscribe