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Study About Whether Atirmociclib/PF-07220060 Proportionally Increases Exposure as Dose Increases in Healthy Participants

A PHASE 1, OPEN-LABEL, TWO-PERIOD, CROSS-OVER STUDY TO EVALUATE DOSE PROPORTIONALITY OF ATIRMOCICLIB (PF-07220060) PHARMACOKINETICS WHEN ADMINISTERED UNDER FED CONDITIONS TO HEALTHY PARTICIPANTS

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07215078
Enrollment
72
Registered
2025-10-10
Start date
2025-10-08
Completion date
2026-08-13
Last updated
2026-08-21

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

Conditions

Healthy Volunteer

Keywords

Dose proportionality on the pharmacokinetics, Dose proportionality on the safety and tolerability, Atirmociclib (PF-07220060)

Brief summary

The purpose of this clinical trial is to learn about the dose proportionality on the PK of the study medicine (called atirmociclib) when administered in the various doses range under the fed condition in healthy participants. This study is seeking participants who are: 1. male and female aged 18 to 65 years are healthy as determined by medical evaluation including medical history, physical examination, and laboratory tests 2. with BMI of 17.5-30.5 kg/m2; and a total body weight \>50 kgs (110 lbs.). All participants (72 total) in this study will receive atirmociclib at Dose (A), Dose (B), Dose (C), and Dose (D) oral dose in 1 of the 12 treatment sequences among 6 cohorts under fed conditions. Atirmociclib will be given by mouth at the study research unit once single dose about 30 minutes after a moderate fat standard calorie meal. Dose proportionality will be evaluated on the pharmacokinetics (PK), safety and tolerability of atirmociclib at Doses (A), (B), (C), and (D) oral dose under the fed condition. Including the 28 days of screening window and the 35 days safety follow-up period, the total study duration for each participant can be up to 71 days, containing 2 periods (6 days for each period), minimum 7-day interval between two periods, and follow-up period 28 to 35 days from administration of the final dose of study intervention. During this time, they will undergo safety laboratory and serial blood PK samplings up to 120 hours after administration of atirmociclib to determine plasma concentrations of atirmociclib. Participants will be discharged from the research unit on Period 2 Day 6 following completion of all assessments.

Interventions

DRUGatirmociclib (PF-07220060)

Open-label, two-period, cross-over study to evaluate dose proportionality of atirmociclib (PF-07220060) pharmacokinetics when administered under fed condition to healthy participants

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Phase 1, open-label, randomized, two-period, cross-over study to evaluate the dose proportionality on the pharmacokinetics, safety, and tolerability

Eligibility

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

Inclusion criteria

Inclusion: * Participants who are overtly healthy as determined by medical evaluation including medical history, physical examination, and laboratory tests. * Body mass Index (BMI) of 17.5-30.5 kg/m2; and a total body weight \>50 kg (110 lb.). Exclusion: * 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 (e.g., gastrectomy, cholecystectomy). * History of human immunodeficiency virus (HIV) infection, hepatitis B, or hepatitis C; positive testing for HIV, hepatitis B surface antigen (HBsAg), or hepatitis C antibody (HCVAb). Hepatitis B vaccination is allowed. * Concomitant use of any medications or substances that are strong inducers or inhibitors of CYP3A4 or UGT2B7 are prohibited within 5 half-lives plus 14 days (up to 28 days) prior to first dose of atirmociclib. * Previous exposure to atirmociclib or participation in studies requiring atirmociclib administration.

Design outcomes

Primary

MeasureTime frameDescription
Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf)1 hour prior to atirmociclib dosing, 0.5, 0.75, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 and 120 hours post-doseDose-normalized plasma AUCinf and Cmax of atirmociclib for each cohort (AUClast if AUCinf cannot be estimated)
Maximum Observed Plasma Concentration (Cmax)1 hour prior to atirmociclib dosing, 0.5, 0.75, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 and 120 hours post-dose

Secondary

MeasureTime frame
Number of Participants With Adverse Events (AEs) by Seriousness and Relationship to TreatmentPeriod 1: Days 1-6; minimum 7-day interval between two doses; Period 2: Day 1-35
Number of Participants With Laboratory AbnormalitiesPeriod 1: Days 1-6; minimum 7-day interval between two doses; Period 2: Day 1-35
Number of Participants With Abnormalities in Physical ExaminationPeriod 1: Days 1-6; minimum 7-day interval between two doses; Period 2: Day 1-35
Number of Participants With Clinically Significant Change in Electrocardiogram (ECG) FindingsPeriod 1: Days 1-6; minimum 7-day interval between two doses; Period 2: Day 1-35
Number of Participants With Concomitant MedicationsPeriod 1: Days 1-6; minimum 7-day interval between two doses; Period 2: Day 1-35

Countries

United States

Contacts

STUDY_DIRECTORPfizer CT.gov Call Center

Pfizer

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 22, 2026