A Study in Healthy Women to Test Whether BI 425809 Influences the Amount of a Contraceptive in the Blood

The Effect of Multiple Doses of BI 425809 on the Pharmacokinetics of Multiple Doses of a Combination of Ethinylestradiol and Levonorgestrel Following Oral Administration in Healthy Premenopausal Female Subjects (an Open-label, Two-period, Fixed Sequence Design Trial With run-in Period)

The main objective of this trial is to investigate the possible effect of multiple oral doses of BI 425809 on the steady state pharmacokinetics of ethinylestradiol (EE) and levonogestrel (LNG) (administered as the combined oral contraceptive Microgynon®).

Study Overview

• Status: Completed
• Conditions: Healthy
• Intervention / Treatment: Drug: Iclepertin; Drug: Microgynon®

• Study Type: Interventional
• Enrollment (Actual): 19
• Phase: Phase 1

Contacts and Locations

Study Locations

• Germany
  • Mannheim, Germany, 68167
    • CRS Clinical Research Services Mannheim GmbH

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 35 years (Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Healthy premenopausal female 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 (12-lead ECG), and clinical laboratory tests without any clinically significant abnormalities.
• Age of 18 to 35 years (inclusive).
• Body mass index (BMI) of 18.5 to 29.9 kg/m2 (inclusive).
• Signed and dated written informed consent in accordance with International Conference on Harmonisation-Good Clinical Practice (ICH-GCP) and local legislation prior to admission to the trial.

• Female subjects who meet any of the following criteria starting from at least 30 days before the first administration of BI 425809 and until 30 days after trial completion:

  • Use of adequate contraception, e.g. non-hormonal intrauterine device plus condom.
  • Sexually abstinent.
  • A vasectomised sexual partner (vasectomy at least 1 year prior to enrolment).
  • Surgically sterilised (including hysterectomy).

Exclusion Criteria:

Subjects will not be allowed to participate, if any of the following general criteria apply:

• Any finding in the medical examination (including BP, PR or 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 millimetre(s) 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.
• 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: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Microgynon® (R), then Microgynon® + Iclepertin (T)	Drug: Iclepertin; Iclepertin; Other Names: BI 425809; Drug: Microgynon®; ethinylestradiol (EE) and levonorgestrel (LNG)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Area Under the Concentration-time Curve of Ethinylestradiol (EE) in Plasma at Steady State Over a Uniform Dosing Interval τ (AUCτ,ss)	This outcome measured the area under the concentration-time curve of ethinylestradiol (EE), an active ingredient of Microgynon®, in plasma at steady state over a uniform dosing interval, following the administration of Microgynon® with and without Iclepertin. Geometric least square mean (adjusted geometric mean) and adjusted geometric standard error were calculated using an analysis of variance (ANOVA) model including effects on the sources of variation: treatment. The effect 'subjects within sequences' will be considered as random, whereas the other effects will be considered as fixed.	From within 10 minutes before and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, 12, and 24 hours after the administration of Microgynon® with and without Iclepertin on day 21.
Area Under the Concentration-time Curve of Levonogestrel (LNG) in Plasma at Steady State Over a Uniform Dosing Interval τ (AUCτ,ss)	This outcome measured the area under the concentration-time curve of levonogestrel (LNG), an active ingredient of Microgynon®, in plasma at steady state over a uniform dosing interval, following the administration of Microgynon® with and without Iclepertin. Geometric least square mean (adjusted geometric mean) and adjusted geometric standard error were calculated using an analysis of variance (ANOVA) model including effects on the sources of variation: treatment. The effect 'subjects within sequences' will be considered as random, whereas the other effects will be considered as fixed.	From within 10 minutes before and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, 12, and 24 hours after the administration of Microgynon® with and without Iclepertin on day 21.
Maximum Measured Concentration of Ethinylestradiol (EE) in Plasma at Steady State Over a Uniform Dosing Interval τ (Cmax,ss)	This outcome measured the maximum measured concentration of ethinylestradiol (EE), an active ingredient of Microgynon®, in plasma at steady state over a uniform dosing interval, following the administration of Microgynon® with and without Iclepertin. Geometric least square mean (adjusted geometric mean) and adjusted geometric standard error were calculated using an analysis of variance (ANOVA) model including effects on the sources of variation: treatment. The effect 'subjects within sequences' will be considered as random, whereas the other effects will be considered as fixed.	From within 10 minutes before and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, 12, and 24 hours after the administration of Microgynon® with and without Iclepertin on day 21.
Maximum Measured Concentration of Levonorgestrel (LNG) in Plasma at Steady State Over a Uniform Dosing Interval τ (Cmax,ss)	This outcome measured the maximum measured concentration of levonorgestrel (LNG), an active ingredient of Microgynon®, in plasma at steady state over a uniform dosing interval, following the administration of Microgynon® with and without Iclepertin. Geometric least square mean (adjusted geometric mean) and adjusted geometric standard error were calculated using an analysis of variance (ANOVA) model including effects on the sources of variation: treatment. The effect 'subjects within sequences' will be considered as random, whereas the other effects will be considered as fixed.	From within 10 minutes before and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, 12, and 24 hours after the administration of Microgynon® with and without Iclepertin on day 21.
Minimum Measured Concentration of Ethinylestradiol (EE) in Plasma at Steady State Over a Uniform Dosing Interval τ (Cmin,ss )	This outcome measured the minimum measured concentration of ethinylestradiol (EE), an active ingredient of Microgynon®, in plasma at steady state over a uniform dosing interval, following the administration of Microgynon® with and without Iclepertin. Geometric least square mean (adjusted geometric mean) and adjusted geometric standard error were calculated using an analysis of variance (ANOVA) model including effects on the sources of variation: treatment. The effect 'subjects within sequences' will be considered as random, whereas the other effects will be considered as fixed.	From within 10 minutes before and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, 12, and 24 hours after the administration of Microgynon® with and without Iclepertin on day 21.
Minimum Measured Concentration of Levonorgestrel (LNG) in Plasma at Steady State Over a Uniform Dosing Interval τ (Cmin,ss )	This outcome measured the minimum measured concentration of Levonorgestrel (LNG), an active ingredient of Microgynon®, in plasma at steady state over a uniform dosing interval, following the administration of Microgynon® with and without Iclepertin. Geometric least square mean (adjusted geometric mean) and adjusted geometric standard error were calculated using an analysis of variance (ANOVA) model including effects on the sources of variation: treatment. The effect 'subjects within sequences' will be considered as random, whereas the other effects will be considered as fixed.	From within 10 minutes before and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, 12, and 24 hours after the administration of Microgynon® with and without Iclepertin on day 21.

Collaborators and Investigators

• Sponsor: Boehringer Ingelheim

Publications and helpful links

General Publications

• Madari S, Balavarca Y, Shatillo Y, Reuteman-Fowler C, Desch M. The Effect of Multiple Oral Doses of a Glycine Transporter 1 Inhibitor, Iclepertin (BI 425809), on the Steady-state Pharmacokinetics of a Combined Oral Contraceptive Containing Ethinylestradiol and Levonorgestrel: a Phase I Clinical Trial in Healthy Females. Clin Drug Investig. 2025 Oct;45(10):767-779. doi: 10.1007/s40261-025-01472-5. Epub 2025 Sep 4.

Helpful Links

• Related Info

Study record dates

Study Major Dates

• Study Start (Actual): November 24, 2022
• Primary Completion (Actual): October 4, 2023
• Study Completion (Actual): October 4, 2023

Study Registration Dates

• First Submitted: November 7, 2022
• First Submitted That Met QC Criteria: November 7, 2022
• First Posted (Actual): November 14, 2022

Study Record Updates

• Last Update Posted (Actual): May 6, 2026
• Last Update Submitted That Met QC Criteria: April 16, 2026
• Last Verified: April 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Physiological Effects of Drugs; Contraceptive Agents, Hormonal; Contraceptive Agents; Reproductive Control Agents; Contraceptives, Oral, Combined; Contraceptives, Oral; Contraceptive Agents, Female; Contraceptives, Oral, Synthetic; Contraceptives, Oral, Hormonal; Nootropic Agents; Contraceptives, Postcoital, Synthetic; Contraceptives, Postcoital; Contraceptives, Postcoital, Hormonal; BI 425809; ethinyl estradiol, levonorgestrel drug combination
• Other Study ID Numbers: 1346-0036; 2022-500050-42-00 (Registry Identifier: CTIS)

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. Exceptions might apply, e.g. studies in products where Boehringer Ingelheim is not the license holder; studies regarding pharmaceutical formulations and associated analytical methods, and studies pertinent to pharmacokinetics using human biomaterials; studies conducted in a single center or targeting rare diseases (in case of low number of patients and therefore limitations with anonymization).

For more details refer to:

https://www.mystudywindow.com/msw/datatransparency

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No