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A Study to Learn How Different Amounts of the Study Medicine Called PF-07999415 Are Tolerated and Act in the Body in Healthy Adults

A PHASE 1, RANDOMIZED, DOUBLE BLIND, SPONSOR-OPEN, PLACEBOCONTROLLED, SINGLE DOSE ESCALATION STUDY TO EVALUATE THE SAFETY, TOLERABILITY, AND PHARMACOKINETICS OF SUBCUTANEOUS ADMINISTRATION OF PF-07999415 IN HEALTHY ADULT PARTICIPANTS

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06965465
Enrollment
32
Registered
2025-05-11
Start date
2025-06-20
Completion date
2026-08-21
Last updated
2026-07-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy

Brief summary

The purpose of this clinical study is to learn about the safety and effects of the study medicine (called PF-07999415) in healthy adult participants. This study is seeking volunteers aged 18 to 65 years old who do not have any major health issues. Some participants in this study will receive a single dose of PF-07999415 as a shot in the thigh, abdomen, or arm at the study clinic. Afterward, participants will stay in a hospital-like setting for 2 weeks, where they will be monitored for reactions to the study medicine. The study team will compare the experiences of people receiving PF-07999415 to those of the people who do not. This will help the study team decide if PF-07999415 is safe. Participants will take part in this study for 3 to 7 months. During this time, participants will stay at the healthcare facility for 2 weeks and then come back for study visits every 2-4 weeks until completing the study.

Interventions

BIOLOGICALPF-07999415

Participants will receive single doses of PF-07999415.

DRUGPlacebo

Participants will receive matching placebo.

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Caregiver, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes

Inclusion criteria

* Male and female participants of non-childbearing potential aged 18 to 65 years, inclusive, at screening who are overtly healthy as determined by medical evaluation including medical history, physical examination, laboratory tests, and cardiac monitoring. * Body Mass Index (BMI) of 18-33 kg/m2 and a total body weight \>50 kg (110 lb).

Exclusion criteria

* Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, dermatological, gastrointestinal, cardiovascular, hepatic, psychiatric, neurological, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at the time of dosing). * Any medical or psychiatric condition including recent (within the past year) or active suicidal ideation/behavior or laboratory abnormality or other conditions that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study. * Previous administration of an investigational product (drug or vaccine) within 30 days (or as determined by the local requirement) 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.

Design outcomes

Primary

MeasureTime frame
Number of participants with treatment emergent adverse events.First dose (Day 1) to up to final follow-up visit (Day 120)

Secondary

MeasureTime frame
Area under the concentration-time profile from time 0 to the time of the last quantifiable concentration (AUClast) for PF-07999415First dose (Day 1) to up to final follow-up visit (Day 120)
Maximum observed concentration (Cmax) for PF-07999415First dose (Day 1) to up to final follow-up visit (Day 120)
Time to maximum observed concentration (Tmax) for PF-07999415First dose (Day 1) to up to final follow-up visit (Day 120)

Countries

Belgium

Contacts

STUDY_DIRECTORPfizer CT.gov Call Center

Pfizer

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 24, 2026