A Study in Healthy Men to Test Whether BI 1815368 Influences the Amount of Metformin in the Body

Investigation of the Effect of BI 1815368 on the Pharmacokinetics of Metformin Following Multiple Oral Administration in Healthy Subjects (an Open-label, Randomised, Two-way Crossover Trial)

The main objective of this trial is to investigate the effect on the exposure of metformin in plasma when administered as an oral multiple dose together with multiple oral doses of BI 1815368 (Test, T) as compared to when metformin is administered as an oral multiple dose alone (Reference, R).

Inclusion criteria:

1. 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
2. Age of 18 to 50 years (inclusive)
3. Body mass index (BMI) of 18.5 to 29.9 kg/m2 (inclusive)
4. Signed and dated written informed consent in accordance with international conference on harmonization-good clinical practice (ICH-GCP) and local legislation prior to admission to the trial

Exclusion criteria:

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