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Prifetrastat

Phase 1

Healthy Adults | Small molecule | Other |Pfizer, Inc.|Last Updated: Jul 28, 2026

Target and mechanism

Target class-Stat (Enzyme)
ModalitySmall molecule

Also known as prifetrastat Reference

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLED
Total Trials1
Total Enrollment12

FDA Designations

No designations recorded

Clinical trial landscape

Prifetrastat · 1 trial · 1 indication

Phase 1 1
NCT07731100A Study to Learn About How Food Affects the Uptake of Study Medicine Prifetrastat Into the Blood in Healthy AdultsHealthy Adults
NOT YET_RECRUITING12 Analytics
PHASE1NOT YET_RECRUITING
A Study to Learn About How Food Affects the Uptake of Study Medicine Prifetrastat Into the Blood in Healthy Adults
Healthy AdultsUnlock trial analytics

Study Endpoints

Primary Endpoints

Area under the concentration-time curve from time zero to extrapolated infinite time (AUCinf) for Prifetrastat
0 (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 Prifetrastat
0 (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 Prifetrastat
0 (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 Endpoints

Number of participants with treatment-emergent adverse events
Up to 28 to 35 days post last study intervention dose
Number of participants with laboratory test abnormalities
Up to 28 to 35 days post last study intervention dose
Number of participants with vital signs values meeting categorical summarization criteria
Up to 28 to 35 days post last study intervention dose
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelCROSSOVER
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
Sequence ABEXPERIMENTALPeriod 1 (Treatment A) : PF-07248144 single dose following an overnight fast Period 2 (Treatment B): PF-07248144 single dose following a high-fat, high-calorie meal Treatments A and B will be separated with a washout of at least 14 days
Sequence BAEXPERIMENTALPeriod 1 (Treatment B): PF-07248144 single dose following a high-fat, high-calorie meal Period 2 (Treatment A): PF-07248144 single dose following an overnight fast Treatments B and A will be separated with a washout of at least 14 days

Interventions

NameTypeDescription
PrifetrastatDRUGParticipants 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
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersYes
Study Sites1

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 ...

Countries:United States
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Recent Changes (Last 90 Days)

LOWJul 28, 2026NCT07731100NEW_TRIAL: changed
LOWJul 28, 2026NCT07731100NEW_TRIAL: changed

Frequently asked questions about Prifetrastat

What is Prifetrastat used for?

Prifetrastat is an investigational small molecule being studied in healthy adults and healthy participants. It is not approved for any disease and is currently in Phase 1 clinical development. The ongoing trials are designed to learn how different forms of the study medicine are taken up into the blood and how food affects its uptake.

What does Prifetrastat target?

Prifetrastat is a small molecule with a target class described as a -stat enzyme inhibitor. The specific molecular target is not disclosed in the available information. It is being studied in healthy participants to understand its pharmacokinetics, or how the drug is absorbed into the blood.

Who makes Prifetrastat?

Prifetrastat is being developed by Pfizer, Inc., which trades on the New York Stock Exchange under the ticker symbol PFE. The company is conducting Phase 1 clinical trials to evaluate how the drug is taken up into the blood in healthy adults.

What phase is Prifetrastat in?

Prifetrastat is in Phase 1 clinical development. It is an investigational drug and has not been approved by regulatory authorities. Two Phase 1 trials are listed, one recruiting and one not yet recruiting, both enrolling healthy adult participants.

What clinical trials is Prifetrastat in?

Prifetrastat is being studied in two Phase 1 trials. NCT07721402 is a study in Belgium enrolling 32 healthy participants to learn how different forms of the medicine are taken up into the blood. NCT07731100 is a study in the United States enrolling 12 healthy adults to evaluate how food affects drug uptake.

Is Prifetrastat the same as prifetrastat in combination with fulvestrant?

Prifetrastat is also known as prifetrastat in combination with fulvestrant and prifetrastat Reference. The available clinical trials, however, study prifetrastat alone in healthy participants and do not include fulvestrant or any combination therapy.