Recent Updates
Recently added Catalysts

prifetrastat Reference

Phase 1

Healthy Participant | Small molecule | Other |Pfizer, Inc.|Last Updated: Jul 23, 2026

Target and mechanism

Target class-Stat (Enzyme)
ModalitySmall molecule

Also known as Prifetrastat

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

RandomizedACTIVE_CONTROLLED
Total Trials1
Total Enrollment32

FDA Designations

No designations recorded

Clinical trial landscape

prifetrastat Reference · 1 trial · 1 indication

Phase 1 1
NCT07721402A Study to Learn About How Different Forms of Study Medicine Prifetrastat Are Taken Up Into the Blood in Healthy AdultsHealthy Participant
RECRUITING32 Analytics
PHASE1RECRUITING
A Study to Learn About How Different Forms of Study Medicine Prifetrastat Are Taken Up Into the Blood in Healthy Adults
Healthy ParticipantUnlock trial analytics

Study Endpoints

Primary Endpoints

Area under the Plasma Concentration-Time profile from time 0 to extrapolated infinite time (AUCinf) of Reference treatment of prifetrastat (AUClast If data does not permit AUCinf)
Pre-dose, 0, 0.5, 1, 1.5, 2, 3, 4 ,6 , 8, 12, 24, 36, 48, 72, 96, 144 hours post dose in period 1 and period 2

AUCinf was area under the plasma concentration time-curve from zero (pre-dose) extrapolated out to infinite time (If data permits).

Maximum Observed Plasma Concentration (Cmax) profile of Reference prifetrastat treatment
Pre-dose, 0, 0.5, 1, 1.5, 2, 3, 4 ,6 , 8, 12, 24, 36, 48, 72, 96, 144 hours post dose in period 1 and period 2

Cmax was the maximum observed plasma concentration directly observed from data.

Area under the Plasma Concentration-Time profile from time 0 to extrapolated infinite time (AUCinf) of Test 1 treatment of prifetrastat (AUClast If data does not permit AUCinf)
Pre-dose, 0, 0.5, 1, 1.5, 2, 3, 4 ,6 , 8, 12, 24, 36, 48, 72, 96, 144 hours post dose in period 1 and period 2

AUCinf was area under the plasma concentration time-curve from zero (pre-dose) extrapolated out to infinite time (If data permits).

Maximum Observed Plasma Concentration (Cmax) profile of Test 1 prifetrastat treatment
Pre-dose, 0, 0.5, 1, 1.5, 2, 3, 4 ,6 , 8, 12, 24, 36, 48, 72, 96, 144 hours post dose in period 1 and period 2

Cmax was the maximum observed plasma concentration directly observed from data.

Area under the Plasma Concentration-Time profile from time 0 to extrapolated infinite time (AUCinf) of Test 2 treatment of prifetrastat (AUClast If data does not permit AUCinf)
Pre-dose, 0, 0.5, 1, 1.5, 2, 3, 4 ,6 , 8, 12, 24, 36, 48, 72, 96, 144 hours post dose in period 1 and period 2

AUCinf was area under the plasma concentration time-curve from zero (pre-dose) extrapolated out to infinite time (If data permits).

Maximum Observed Plasma Concentration (Cmax) profile of Test 2 prifetrastat treatment
Pre-dose, 0, 0.5, 1, 1.5, 2, 3, 4 ,6 , 8, 12, 24, 36, 48, 72, 96, 144 hours post dose in period 1 and period 2

Cmax was the maximum observed plasma concentration directly observed from data.

Secondary Endpoints

Number of Participants With Treatment Emergent Adverse Events (TEAEs)
Up to Day 35 after the last dose of study intervention in Period 2
Number of Participants with Clinically Significant Abnormalities in Laboratory Parameters
Up to Day 35 after the last dose of study intervention in Period 2
Number of Participants With Clinically Significant Abnormalities in Vital Signs
Up to Day 35 after the last dose of study intervention in Period 2
Unlock Study Endpoints

Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelCROSSOVER
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
Arm 1 prifetrastatACTIVE_COMPARATORCrossover
Arm 2 prifetrastatACTIVE_COMPARATORCrossover

Interventions

NameTypeDescription
prifetrastat ReferenceDRUGReference Treatment
prifetrastat Test 1DRUGTest 1 Treatment
prifetrastat Test 2DRUGTest 2 Treatment
Unlock Study Design Details

Eligibility Criteria

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

Inclusion * Females of non-childbearing 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. * BMI of 18-32 kilogram per meter square(Kg/m\^2);...

Countries:Belgium
Unlock Eligibility Criteria

Recent Changes (Last 90 Days)

LOWJul 24, 2026NCT07721402NEW_TRIAL: changed
LOWJul 24, 2026NCT07721402NEW_TRIAL: changed

Frequently asked questions about prifetrastat Reference

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.