A Study in Healthy Men to Test How Fluconazole Influences the Amount of BI 425809 in the Blood

April 14, 2026 updated by: Boehringer Ingelheim

Effect of Fluconazole on the Pharmacokinetics of a Single Oral Dose of BI 425809 in Healthy Male Subjects (an Open-label, Two-period Fixed-sequence Design Study)

The main objective of this trial is to investigate the effect of fluconazole, under steady state conditions on the pharmacokinetics of BI 425809 (Reference Treatment R: BI 425809 alone; Test Treatment T: BI 425809 given under steady state conditions of fluconazole).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
15

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Germany
      • Biberach, Germany, 88397
        • Humanpharmakologisches Zentrum Biberach

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 55 years (Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Healthy male subjects according to the assessment of the investigator, as based on a complete medical history including a physical examination, vital signs (blood pressure (BP), pulse rate (PR)), 12-lead Electrocardiogram (ECG), and clinical laboratory tests
  • Age of 18 to 55 years (inclusive)
  • Body mass index (BMI) of 18.5 to 29.9 Kilograms/Square Meter (kg/m2) (inclusive)
  • Signed and dated written informed consent prior to admission to the study, in accordance with Good Clinical Practice (GCP) and local legislation

Exclusion Criteria:

  • Any finding in the medical examination (including blood pressure (BP), pulse rate (PR) or Electrocardiogram (ECG)) deviating from normal and assessed as clinically relevant by the investigator
  • Repeated measurement of systolic blood pressure outside the range of 90 to 140 millimetres of mercury (mmHg), diastolic blood pressure outside the range of 50 to 90 mmHg, or pulse rate outside the range of 45 to 90 beats per minute (bpm)
  • Any laboratory value outside the reference range that the investigator considers to be of clinical relevance
  • Any evidence of a concomitant disease assessed as clinically relevant by the investigator
  • Relevant gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological or hormonal disorders
  • Cholecystectomy or other surgery of the gastrointestinal tract that could interfere with the pharmacokinetics of the trial medication (except appendectomy or simple hernia repair)
  • Diseases of the central nervous system (including but not limited to any kind of seizures or stroke), and other relevant neurological or psychiatric disorders
  • History of relevant orthostatic hypotension, fainting spells, or blackouts Further exclusion criteria apply.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: BI 425809 (R)/BI 425809 + fluconazole (T)
Participants were administered on Day 1 of treatment period 1 a single oral dose of 1 film-coated tablet of 10 milligram (mg) BI 425809 with 240 milliliter (mL) of water after an overnight fast of at least 10 hours (h) as reference treatment (R). In treatment period 2 participants were administered 400 mg fluconazole as 2 hard capsules of 200 mg once daily (400 mg in total) for 13 days orally with 240 mL of water, starting from Day -4 up to Day 9 of period 2. On Day 1 of period 2 (1 h after the fluconazole administration) a single oral dose of 1 film-coated tablet of 10 mg BI 425809 was administered with 240 mL of water after an overnight fast of at least 10 h (Test Treatment (T)). There was a washout interval of at least 16 days between the administrations of BI 425809 in the 2 trial periods.
Drug: BI 425809
Single oral dose of BI 425809 as film-coated tablet on Day 1 of period 1. Single oral dose of BI 425809 as film-coated tablet on Day 1 of period 2.
Other Names:
  • Iclepertin
Drug: fluconazole
Fluconazole orally as hard capsules once daily for 13 days (Day -4 up to Day 9) in period 2.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Area Under the Concentration-time Curve of the Analyte in Plasma Over the Time Interval From 0 to 215 h Post Administration of BI 425809 (AUC0-215)
Time Frame: Within 3 hours (h) before and at 0.5h, 1h, 1.5h, 2h, 3h, 4h, 5h, 6h, 8h, 12h, 24h, 47h, 71h, 119h, 167h and 215h after administration of BI 425809 on Day 1 of each period.
Area under the concentration-time curve of the analyte in plasma over the time interval from 0 to 215 h post administration of BI 425809 (AUC0-215) is reported.
Within 3 hours (h) before and at 0.5h, 1h, 1.5h, 2h, 3h, 4h, 5h, 6h, 8h, 12h, 24h, 47h, 71h, 119h, 167h and 215h after administration of BI 425809 on Day 1 of each period.
Maximum Measured Concentration of BI 425809 in Plasma (Cmax)
Time Frame: Within 3 hours (h) before and at 0.5h, 1h, 1.5h, 2h, 3h, 4h, 5h, 6h, 8h, 12h, 24h, 47h, 71h, 119h, 167h and 215h after administration of BI 425809 on Day 1 of each period.
Maximum measured concentration of BI 425809 in plasma (Cmax) is reported.
Within 3 hours (h) before and at 0.5h, 1h, 1.5h, 2h, 3h, 4h, 5h, 6h, 8h, 12h, 24h, 47h, 71h, 119h, 167h and 215h after administration of BI 425809 on Day 1 of each period.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Area Under the Concentration-time Curve of BI 425809 in Plasma Over the Time Interval From 0 Extrapolated to Infinity (AUC0-∞)
Time Frame: Within 3 hours (h) before and at 0.5h, 1h, 1.5h, 2h, 3h, 4h, 5h, 6h, 8h, 12h, 24h, 47h, 71h, 119h, 167h and 215h after administration of BI 425809 on Day 1 of each period.
Area under the concentration-time curve of BI 425809 in plasma over the time interval from 0 extrapolated to infinity (AUC0-∞) is reported.
Within 3 hours (h) before and at 0.5h, 1h, 1.5h, 2h, 3h, 4h, 5h, 6h, 8h, 12h, 24h, 47h, 71h, 119h, 167h and 215h after administration of BI 425809 on Day 1 of each period.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Boehringer Ingelheim

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 19, 2021

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
January 10, 2022

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 10, 2022

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 5, 2021

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 5, 2021

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 13, 2021

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 4, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 14, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
April 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 1346-0017
  • 2021-003389-10 (EudraCT Number)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Clinical studies sponsored by Boehringer Ingelheim, phases I to IV, interventional and non-interventional, are in scope for sharing of the raw clinical study data and clinical study documents, except for the following exclusions:

  1. studies in products where Boehringer Ingelheim is not the license holder;
  2. studies regarding pharmaceutical formulations and associated analytical methods, and studies pertinent to pharmacokinetics using human biomaterials;
  3. studies conducted in a single center or targeting rare diseases (because of limitations with anonymization).

For more details refer to: https://www.clinicalstudies.boehringer-ingelheim.com/msw/datasharing

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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