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

Starting soon · Phase 1

Conditions studied: Healthy Adults

In brief

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.

Key facts

Study ID

NCT07731100

Run by

Pfizer

People needed

12

Starts

2026-07-24

Expected to finish

2026-10-02

Last updated by the study team

2026-07-28

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• 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).

You may not qualify if…

• 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.

Where it is running

• Pfizer Clinical Research Unit - New Haven — New Haven, Connecticut, United States

Full record on ClinicalTrials.gov

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