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A Study to Learn About How Food Affects the Uptake of Study Medicine Prifetrastat Into the Blood in Healthy Adults

A PHASE 1, RANDOMIZED, OPEN-LABEL, 2-PERIOD, 2-SEQUENCE, SINGLE-DOSE, CROSSOVER STUDY IN HEALTHY PARTICIPANTS TO EVALUATE THE EFFECT OF FOOD ON THE RELATIVE BIOAVAILABILITY OF PRIFETRASTAT

Status
Not yet recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07731100
Enrollment
12
Registered
2026-07-28
Start date
2026-07-24
Completion date
2026-10-02
Last updated
2026-07-28

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

Conditions

Healthy Adults

Keywords

Prifetrastat, Food Effect, PF-07248144

Brief summary

The purpose of the study is to assess the effect of food (high-fat, high-calorie meal) on the total and peak drug exposure of the planned to be marketed tablet formulation of prifetrastat. This study is seeking participants who are: \- Healthy males and females of nonchildbearing potential ≥18 years of age at screening The participants will receive study medicine prifetrastat as a single tablet by mouth at study clinic under fed or fasted condition. After at least 14 days, they will receive another single tablet of prifetrastat by mouth under fasted or fed condition. The sequence of conditions (fed or fasted first) will be randomized. The results of this study will enable data-driven guidance regarding food intake for participants enrolled in clinical studies of prifetrastat as well as patients receiving prifetrastat post-marketing. Participants will remain in clinic for about 21 days and have one follow up contact.

Interventions

DRUGPrifetrastat

Participants will receive Prifetrastat as a single dose, oral tablet on Day 1 of Period 1 and Day 1 of Period 2 with a washout period between two doses

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
BASIC_SCIENCE
Masking
NONE

Eligibility

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

Inclusion criteria

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

Exclusion criteria

* Use of prescription or nonprescription drugs and dietary and herbal supplements within 14 days or 5 half-lives (whichever is longer) prior to the first dose of study intervention * Any prior use of epigenetic modifying agents. * Current use or anticipated need for food or drugs that are known moderate or strong inducers or inhibitors of CYP2C9 or CYP3A4, including their administration within 14 days plus 5 half-lives of the inducers or 14 days or 5 half lives (whichever is longer) for the inhibitors of CYP2C9 or CYP3A4, prior to first dose of study intervention, during the treatment period, and within 6 days after the last dose of prifetrastat. * Proton pump inhibitors must be discontinued at least 14 days prior to the first dose of study medication and throughout treatment period.

Design outcomes

Primary

MeasureTime frame
Area under the concentration-time curve from time zero to extrapolated infinite time (AUCinf) for Prifetrastat0 (pre-dose), 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 96, 120, and 144 hours post-dose
Area under the concentration-time curve from time zero to time of last measurable concentration (AUClast) for Prifetrastat0 (pre-dose), 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 96, 120, and 144 hours post-dose
Maximum observed plasma concentration (Cmax) for Prifetrastat0 (pre-dose), 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 96, 120, and 144 hours post-dose

Secondary

MeasureTime frame
Number of participants with treatment-emergent adverse eventsUp to 28 to 35 days post last study intervention dose
Number of participants with laboratory test abnormalitiesUp to 28 to 35 days post last study intervention dose
Number of participants with vital signs values meeting categorical summarization criteriaUp to 28 to 35 days post last study intervention dose
Number of participants with clinically significant physical examination abnormalitiesUp to 28 to 35 days post last study intervention dose
Number of participants with treatment emergent clinically significant abnormal electrocardiogram (ECG) measurementsUp to 28 to 35 days post last study intervention dose

Countries

United States

Contacts

CONTACTPfizer CT.gov Call Center
ClinicalTrials.gov_Inquiries@pfizer.com1-800-718-1021
STUDY_DIRECTORPfizer CT.gov Call Center

Pfizer

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 29, 2026