Healthy AdultsPhase 1NCT07636018
A Study to Learn if the Study Medicine Called Fluconazole Changes How the Other Body Processes the Study Medicine PF-07248144
A Phase 1 study testing PF-07248144 and Fluconazole in people with Healthy Adults, run by Pfizer at 1 site in Belgium.
Trial summary
The purpose of the study is to learn how the study medicine called fluconazole changes how the body processes the other study medicine called PF-07248144. The study will also look at the safety, tolerability, and how the medicine is changed and removed from the body after taking PF-07248144 alone compared to when it… Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Healthy Adults
- What is being tested?
- PF-07248144 and Fluconazole
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 12 participants
- Where
- 1 siteBelgium
- Study dates
- 26 Aug 2025to 4 Nov 2025
- Phase
- Phase 1
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Male or female of nonchildbearing potential ≥ 18 years of age, inclusive, at screening who are overtly healthy as determined by medical evaluations 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).
Who cannot join
- 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).
- Use 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.
Trial locations and contacts
1 site in 1 country.
Belgium1 site
Pfizer Clinical Research Unit - Brussels
Brussels, Bruxelles-capitale, Région de, B-1070
About this study
Official title: A PHASE 1, OPEN-LABEL, FIXED SEQUENCE, 2-PERIOD, CROSSOVER STUDY IN HEALTHY PARTICIPANTS TO INVESTIGATE THE EFFECT OF FLUCONAZOLE ON PF-07248144 PHARMACOKINETICS
The purpose of the study is to learn how the study medicine called fluconazole changes how the body processes the other study medicine called PF-07248144. The study will also look at the safety, tolerability, and how the medicine is changed and removed from the body after taking PF-07248144 alone compared to when it is taken with fluconazole.
Fluconazole can change how your body processes some medications so it may change the body's processing of PF-07248144. Multiple blood samples will be collected up to 10 days after each dose of PF-07248144 to determine how much PF-07248144 is in the blood at different times. This will help characterize the pharmacokinetics (pharmacokinetics helps us understand how the drug is changed and eliminated from your body after you take it) of PF-07248144 alone and when taken with fluconazole.
- Conditions
- Healthy Adults
- Being tested
- PF-07248144, Fluconazole
- Keywords
- PF-07248144, Fluconazole, DDI, Drug-Drug Interaction
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
PF-07248144Drug
PF-07248144 administered by mouth as a single dose in Period 1 and Period 2.
FluconazoleDrug
Fluconazole administered by mouth once a day for 13 days in Period 2.
| Study group | Role | What they receive |
|---|---|---|
| PF-07248144 | Experimental | PF-07248144 administered by mouth as a single dose in Period 1 and Period 2. Fluconazole administered by mouth once a day for 13 days in Period 2. Receives: Drug: PF-07248144; Drug: Fluconazole |
What is being measured
The primary outcome is the main question the study is designed to answer.
Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf) of PF-07248144 - Period 1
Measured: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, and 216 hours post-dose
AUCinf of PF-07248144 - Period 2
Measured: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, and 216 hours post-dose
Maximum Observed Plasma Concentration (Cmax) of PF-07248144 - Period 1
Measured: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, and 216 hours post-dose
Cmax of PF-07248144 - Period 2
Measured: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, and 216 hours post-dose
Secondary outcomes (5)
Number of Treatment-Emergent Adverse Events (AE) by Severity
Measured: From Baseline through follow-up, up to 35 days after last dose of study drug in Period 2 (Period 2 is up to 48 days).
Number of Participants With Clinically Significant Clinical Laboratories Abnormalities
Measured: From Baseline through follow-up, up to 35 days after last dose of study drug in Period 2 (Period 2 is up to 48 days).
Number of Participants With Clinically Significant Change From Baseline in Blood Pressure or Heart Rate
Measured: From Baseline up to Period 2 Day 14 (Period 2 is up to 48 days)
Number of Participants With Abnormalities in Physical Examination
Measured: From Baseline up to Period 2 Day 14 (Period 2 is up to 48 days)
Number of Participants With Clinically Significant Change in Electrocardiogram (ECG) Findings
Measured: From Baseline up to Period 2 Day 14 (Period 2 is up to 48 days)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Jun 2026
- Study start26 Aug 2025
- Primary completion8 Oct 2025
- Study completion4 Nov 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Healthy AdultsStudies of the same condition, open and under way.
- More trials run by PfizerThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Crossover
- Masking
- None (open label)
- Enrolment
- 12 participants (actual)
Sponsor and investigators
- Lead sponsor
- Pfizer
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- Pfizer CT.gov Call Center, Study director, Pfizer
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07636018
- Sponsor's protocol ID
- C4551010
- Other IDs
- 2025-521924-31-00, 2025
- Status last verified
- Jun 2026
- First submitted
- 17 Jul 2025
- Last updated
- 9 Jun 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical\_trials/trial\_data\_and\_results/data\_requests.
Study at a glance
From the registry record, last updated by the sponsor on 9 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A PHASE 1, OPEN-LABEL, FIXED SEQUENCE, 2-PERIOD, CROSSOVER STUDY IN HEALTHY PARTICIPANTS TO INVESTIGATE THE EFFECT OF FLUCONAZOLE ON PF-07248144 PHARMACOKINETICS
- ClinicalTrials.gov ID
- NCT07636018
- Acronym / sponsor ID
- C4551010
- Conditions
- Healthy Adults
- Keywords
- PF-07248144, Fluconazole, DDI, Drug-Drug Interaction
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 12 participants (actual)
- Lead sponsor
- PfizerIndustry (pharma, biotech, devices)
- Study start
- 26 Aug 2025 (actual)
- Primary completion
- 8 Oct 2025 (actual)
- Study completion
- 4 Nov 2025 (actual)
- First posted
- 9 Jun 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of the study is to learn how the study medicine called fluconazole changes how the body processes the other study medicine called PF-07248144. The study will also look at the safety, tolerability, and how the medicine is changed and removed from the body after taking PF-07248144 alone compared to when it is taken with fluconazole.
Fluconazole can change how your body processes some medications so it may change the body's processing of PF-07248144. Multiple blood samples will be collected up to 10 days after each dose of PF-07248144 to determine how much PF-07248144 is in the blood at different times. This will help characterize the pharmacokinetics (pharmacokinetics helps us understand how the drug is changed and eliminated from your body after you take it) of PF-07248144 alone and when taken with fluconazole.
Study design
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Crossover
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| PF-07248144 | Experimental | Drug: PF-07248144, Drug: FluconazolePF-07248144 administered by mouth as a single dose in Period 1 and Period 2. Fluconazole administered by mouth once a day for 13 days in Period 2. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Male or female of nonchildbearing potential ≥ 18 years of age, inclusive, at screening who are overtly healthy as determined by medical evaluations 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).
Key exclusion criteria (2 listed)
- 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).
- Use 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.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| PF-07248144PF-07248144 administered by mouth as a single dose in Period 1 and Period 2. | Drug | PF-07248144 |
| FluconazoleFluconazole administered by mouth once a day for 13 days in Period 2. | Drug | PF-07248144 |
Primary outcome
Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf) of PF-07248144 - Period 1
Time frame: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, and 216 hours post-dose
AUCinf of PF-07248144 - Period 2
Time frame: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, and 216 hours post-dose
Maximum Observed Plasma Concentration (Cmax) of PF-07248144 - Period 1
Time frame: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, and 216 hours post-dose
Cmax of PF-07248144 - Period 2
Time frame: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, and 216 hours post-dose
5 secondary outcomes
Number of Treatment-Emergent Adverse Events (AE) by Severity
Time frame: From Baseline through follow-up, up to 35 days after last dose of study drug in Period 2 (Period 2 is up to 48 days).
Number of Participants With Clinically Significant Clinical Laboratories Abnormalities
Time frame: From Baseline through follow-up, up to 35 days after last dose of study drug in Period 2 (Period 2 is up to 48 days).
Number of Participants With Clinically Significant Change From Baseline in Blood Pressure or Heart Rate
Time frame: From Baseline up to Period 2 Day 14 (Period 2 is up to 48 days)
Number of Participants With Abnormalities in Physical Examination
Time frame: From Baseline up to Period 2 Day 14 (Period 2 is up to 48 days)
Number of Participants With Clinically Significant Change in Electrocardiogram (ECG) Findings
Time frame: From Baseline up to Period 2 Day 14 (Period 2 is up to 48 days)
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 9 Jun 2026.
- To obtain contact information for a study center near you, click here.Link provided by the sponsor.
- Individual participant dataSharing planned: No. Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Pfizer CT.gov Call Center study director
Pfizer
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing PF-07248144 and Fluconazole in people with Healthy Adults, run by Pfizer at 1 site in Belgium.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 9 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Belgium. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf) of PF-07248144 - Period 1 (time frame: Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 36, 48, 72, 120, 168, and 216 hours post-dose). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Jun 2026.