A Study to Understand What the Body Does to the Study Medicine Called PF-07799544 When Taken by Healthy Adults

NCT07578636 | Not Yet Recruiting Phase 1 FDA Drug

• 1 other identifier: C4901004
• Study Type: interventional
• Target: 9
• Locations: 0 countries
• Sites: N/A

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-07799544 is taken up into the bloodstream and removed from the body. The study is seeking participants who are: Male Ages 18 to 55 years of age confirmed to be healthy based on medical and physical tests. Weigh more than 50 kilograms (kg) and have a body mass index of 17.5 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-07799544 by mouth. Part two will begin at least 14 days after the dose in part one. In part two, participants will receive one full dose of PF-07799544 by mouth and one small dose of \[14C\] PF-07799544 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-07799544 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 7 weeks, including evaluation at the start and follow-up period.

Conditions

Healthy Male Volunteers

Outcome Measures

Primary Outcomes (2)

• Total recovery (%) of radioactivity in urine, feces and vomitus (if any), expressed as a percent of total oral 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-07799544.

  Period 1 pre-dose to maximum days 15

• Metabolic profiling/identification and determination of relative abundance of [14C]PF-07799544 and the metabolites of PF-07799544 in plasma, urine and feces, if possible.

  To characterize the metabolic profile and identify the circulating and excreted metabolites of PF- 07799544 following administration of a single oral dose of \[14C\]PF-07799544.

  Period 1 pre-dose to maximum days 15

Secondary Outcomes (7)

• The ratio of dose-normalized AUCinf (if data permit, otherwise AUClast) of oral PF-07799544 to IV [14C]PF-07799544.

  Period 2 pre-dose to maximum days 6.

• The ratio of total recovered radioactivity 14C in urine following single dose administration of [14C]PF-07799544 orally in Period 1 and IV microtracer, microdose administration of [14C]PF-07799544 in Period 2.

  Period 1 pre-dose to maximum days 15; Period 2 pre-dose to maximum days 6.

• Number of Participants With Treatment Emergent Adverse Events.

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

• Number of Participants with Treatment Emergent Clinically Significant Laboratory Abnormalities.

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

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

  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-07799544 by mouth in Period 1. After a washout, participants will receive one dose of PF-07799544 by mouth and one intravenous (IV) infusion of \[14C\] PF-07799544 in Period 2

Drug: Oral [14C] PF-07799544; Drug: Oral Unlabeled PF-07799544; Drug: IV [14C] PF-07799544

Interventions

Oral [14C] PF-07799544 DRUG

A single oral dose of \[14C\] PF-07799544 will be administered as an extemporaneous suspension in Period 1.

Cohort 1

Oral Unlabeled PF-07799544 DRUG

A single oral dose of unlabeled PF-07799544 will be administered as extemporaneous solution in Period 2.

Cohort 1

IV [14C] PF-07799544 DRUG

A single IV infusion of \[14C\] PF-07799544 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 - 55 Years
• Gender Eligibility Details: Males only
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Males 18 to 55years 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 17.5-32 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

Related Links

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

Study Officials

• Pfizer CT.gov Call Center

  Pfizer

  STUDY DIRECTOR

Central Study Contacts

Pfizer CT.gov Call Center

CONTACT

1-800-718-1021; ClinicalTrials.gov_Inquiries@pfizer.com

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NON RANDOMIZED
• Masking: NONE
• Masking Details: None (Open-Label)
• Purpose: BASIC SCIENCE
• Intervention Model: CROSSOVER
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Model Details: Crossover Assignment

Study Record Dates

• First Submitted: May 5, 2026
• First Posted: May 11, 2026
• Study Start: May 15, 2026
• Primary Completion (Estimated): September 12, 2026
• Study Completion (Estimated): September 12, 2026
• Last Updated: May 11, 2026

Record last verified: 2026-05

Data Sharing

• IPD Sharing: Will not share