A Study to Understand What the Body Does to the Study Medicine Called PF-07248144 When Taken by Healthy Adults

NCT07423286 | Completed Phase 1 FDA Drug

• 1 other identifier: C4551003
• Study Type: interventional
• Target: 8
• Locations: 1 country
• Sites: 2

Brief Summary

For this study, the study medicine has been specially prepared to contain radiolabeled carbon \[14C\]. \[14C\] is a naturally occurring radioactive form of the element carbon. Adding a low dose of radiation to the study medicine does not change how the medicine works but helps to see how the medicine appears in the blood, urine, and stool after it is given. This type of study is called a radiolabeled study. The purpose of this radiolabeled study is to learn how a certain amount of \[14C\] PF-07248144 is taken up into the bloodstream and removed from the body. The study is seeking participants who are:

• females who cannot have children, or males
• 18 years of age or older
• confirmed to be healthy based on medical and physical tests.
• weigh more than 50 kilograms (kg) and have a body mass index of 18 to 32 kg per meter squared. The study consists of two parts. In part one, all participants will receive one full dose of \[14C\]PF-07248144 by mouth. Part two will begin at least 28 days after the dose in part one. In part two, participants will receive one full dose of PF-07248144 by mouth and one small dose of \[14C\] PF-07248144 by intravenous (IV) infusion. IV infusion will be directly injected into the veins. To understand how the medicine is processed in the body, samples of blood, urine, feces, and vomit (if any) will be collected after each dose is given. This will help understand:
• How much PF-07248144 is taken up into the bloodstream when taken by mouth compared to the dose given by IV
• How the body removes it from the blood steam. Participants will take part in the study for about 15 weeks, including evaluation at the start and follow-up period.

Conditions

Healthy Adult Participants

Outcome Measures

Primary Outcomes (2)

• Total recovery of radioactivity in urine, feces and vomitus (if any) expressed as a percent of total radioactive dose administered.

  To characterize the extent of excretion of total radioactivity in urine, feces, and vomitus (if any) following administration of a single oral dose of \[14C\]PF-07248144.

  Period 1 pre-dose to maximum Days 22

• Metabolic profiling/identification and determination of relative abundance of [14C]PF-07248144 and the metabolites of [14C]PF-07248144 in plasma, urine, and feces.

  To characterize the metabolic profile and identify circulating and excreted metabolites following administration of a single oral dose of \[14C\]PF-07248144.

  Period 1 pre-dose to maximum Days 22

Secondary Outcomes (7)

• The ratio of dose-normalized plasma AUCinf (if data permit, otherwise AUClast) of oral unlabeled PF-07248144 and IV microtracer of [14C]PF-07248144 in Period 2 only.

  Period 2 pre-dose to maximum Days 10

• The ratio of total urinary radioactivity following oral administration of [14C]PF-07248144 in Period 1 and IV microtracer, microdose administration of [14C]PF-07248144 in Period 2.

  Period 1 pre-dose to maximum Days 22; Period 2 pre-dose to maximum Days 10

• Number of Participants With Treatment Emergent Adverse Events

  Baseline and through 28 to 35 days post last study intervention dose

• Number of Participants with Treatment Emergent Clinically Significant Laboratory Abnormalities

  From Baseline up to 28 to 35 days post last study intervention dose

• Number of Participants With Treatment Emergent Clinically Significant Abnormal Vital Signs

  From Baseline up to 28 to 35 days post last study intervention dose

Study Arms (1)

Cohort 1

EXPERIMENTAL

Participants will receive one dose of \[14C\] PF-07248144 by mouth in Period 1. After a washout, participants will receive one dose of PF-07248144 by mouth and one intravenous (IV) infusion of \[14C\] PF-07248144 in Period 2

Drug: Oral [14C] PF-07248144; Drug: Oral unlabeled PF-07248144; Drug: IV [14C] PF-07248144

Interventions

Oral [14C] PF-07248144 DRUG

A single oral dose of \[14C\] PF-07248144 will be administered as an extemporaneous suspension in Period 1

Cohort 1

Oral unlabeled PF-07248144 DRUG

A single oral dose of unlabeled PF-07248144 will be administered as tablets in Period 2

Cohort 1

IV [14C] PF-07248144 DRUG

A single IV infusion of \[14C\] PF-07248144 will be administered at the approximate Tmax after administration of the unlabeled oral dose of PF-07248144 in Period 2

Cohort 1

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Female of nonchildbearing potential or male ≥18 years of age, inclusive, at screening who are overtly healthy as determined by medical evaluation including medical history, physical examination, laboratory tests, vital signs, and 12-lead ECGs.
• BMI of 18-32 kg/m2; and a total body weight \>50 kg (110 lb).

You may not qualify if:

• Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurological, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at the time of dosing.
• Previous administration of an investigational product (drug or vaccine) within 30 days or 5 half-lives preceding the first dose of study intervention used in this study (whichever is longer). Participation in studies of other investigational products (drug or vaccine) at any time during participation in this study.
• Total 14C radioactivity measured in plasma should not exceed 2.5 × standard biological carbon ratio.

Sponsors & Collaborators

• Pfizer: lead

Study Sites (2)

Fortrea Clinical Research Unit - Madison

Madison, Wisconsin, 53704, United States

Location

Fortrea Clinical Research Unit Inc.

Madison, Wisconsin, 53704, United States

Location

Related Links

• To obtain contact information for a study center near you, click here.

Study Officials

• Pfizer CT.gov Call Center

  Pfizer

  STUDY DIRECTOR

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NA
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: CROSSOVER
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 20, 2025
• First Posted: February 20, 2026
• Study Start: October 13, 2025
• Primary Completion: December 28, 2025
• Study Completion: January 16, 2026
• Last Updated: February 20, 2026

Record last verified: 2026-02

Data Sharing

• IPD Sharing: Will not share

Locations

US (2)