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

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: Completed
• Conditions: Healthy
• Intervention / Treatment: Drug: BI 425809; Drug: fluconazole

• Study Type: Interventional
• Enrollment (Actual): 15
• Phase: Phase 1

Contacts and Locations

Study Locations

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

Participation Criteria

Eligibility Criteria

• 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

How is the study designed?

Design Details

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

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

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

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)	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)	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

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-∞)	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

• Sponsor: Boehringer Ingelheim

Publications and helpful links

Helpful Links

• Related Info

Study record dates

Study Major Dates

• Study Start (Actual): October 19, 2021
• Primary Completion (Actual): January 10, 2022
• Study Completion (Actual): January 10, 2022

Study Registration Dates

• First Submitted: October 5, 2021
• First Submitted That Met QC Criteria: October 5, 2021
• First Posted (Actual): October 13, 2021

Study Record Updates

• Last Update Posted (Actual): May 4, 2026
• Last Update Submitted That Met QC Criteria: April 14, 2026
• Last Verified: April 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Heterocyclic Compounds, 1-Ring; Heterocyclic Compounds; Azoles; Triazoles; BI 425809; Fluconazole
• Other Study ID 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