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A Study to Learn How Different Forms of the Study Medicine Called PF 08049820 Are Taken up Into the Bloodstream in Healthy Adults

A Phase 1, Open-Label, Randomized, 5-Period, 6-Sequence, Crossover Study to Compare the Single-Dose Pharmacokinetics of One Immediate-Release and Two Modified-Release Formulations of PF-08049820 Administered Orally to Healthy Adult Participants Under Fasted and Fed Conditions

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07172321
Enrollment
12
Registered
2025-09-15
Start date
2025-09-05
Completion date
2025-10-29
Last updated
2025-11-17

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

Conditions

Atopic Dermatitis

Keywords

Healthy Volunteer

Brief summary

The purpose of this study is to see how different forms of a medicine called PF-08049820 move through the body when taken by mouth. The scientists want to see: * How well is the medicine absorbed when it's made in different ways (fast vs. slow release) * If eating a high-fat meal changes how the medicine moves through the body The results of this study will help decide which version of the medicine is best for future studies. This study is seeking participants who: * are men and women who can't have children * are 18 years or older * weigh more than 99 pounds (45 kg) * have a healthy body weight (not too low or too high) * are generally healthy with no serious medical problems. People with serious health problems, recent drug use, or who had certain vaccines recently cannot join. * are willing to follow all the study rules Each participant will try 5 different versions of the medicine, one at a time. There will be 3 days between each dose to make sure the medicine is out of the system. The medicine will be tested in different forms: * Immediate-release tablet (works quickly) * Short-release tablet (works slowly) * Long-release tablet (works even slower) Some versions will be taken without food, and others after eating a high-fat meal. After each dose, doctors will take blood samples for up to 72 hours to see how the medicine moves through the body. The whole study will take about 6 to 11 weeks and participants will stay overnight in the clinic for about 17 days.

Interventions

DRUGPF-08049820 MR1

Administered orally

DRUGPF-08049820 MR2

Administered orally

DRUGPF-08049820 IR

Administered orally

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
BASIC_SCIENCE
Masking
NONE

Masking description

Open label study

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Male and female participants of non-childbearing potential ≥18 years of age * BMI of 16-32 kg/m2; and a total body weight \>45 kg (99 lbs) * Participants who are willing and able to comply with all scheduled visits, treatment plan, laboratory tests, and other study procedures.

Exclusion criteria

* 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). * Any condition possibly affecting drug absorption (eg, gastrectomy, cholecystectomy). * History of HIV infection, hepatitis B, or hepatitis C; positive testing for HIV, HBsAg, HBsAb, HBcAb, or HCVAb. A positive HBsAb result and a history of Hepatitis B vaccination is allowed. * Use of certain prescription or nonprescription drugs and dietary (e.g. grapefruit) and herbal supplements within up to 14 days or 5 half-lives, whichever is longer, prior to the first dose of study intervention. * Recent exposure to live or attenuated vaccines within 28 days of the screening visit. * 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). * History of alcohol abuse or repeated binge drinking and/or any other illicit drug use or dependence within 6 months of screening.

Design outcomes

Primary

MeasureTime frame
Pharmacokinetics (PK): Plasma Area Under the Concentration Versus Time Curve (AUC) of PF-08049820 in the fasted statePre-dose until 72 hours post dose
PK: Plasma Maximum Concentration (Cmax) of PF-08049820 in the fasted statePre-dose until 72 hours post dose

Secondary

MeasureTime frame
PK: Plasma Maximum Concentration (Cmax) of PF-08049820 in the fed statePre-dose until 72 hours post dose
Number of Participants With Clinical Laboratory AbnormalitiesBaseline, up to Day 16
Number of Participants with Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)First dose, up to follow up visit (28-35 days post last dose)
Number of Participants With Abnormal 12-lead Electrocardiogram (ECG) FindingsBaseline, up to Day 16
Number of Participants With Vital Signs AbnormalitiesBaseline, up to Day 16
PK: Plasma Area Under the Concentration Versus Time Curve (AUC) of PF-08049820 in the fed statePre-dose until 72 hours post dose

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026