A Study in Healthy Men to Test How Zongertinib (BI 1810631) is Taken up and Processed by the Body

A Phase I, Open-label Trial in Two Parallel Parts to Investigate Mass Balance, Metabolism, and Basic Pharmacokinetics of BI 1810631 (C-14) Administered as Oral Solution (Part A) and to Investigate Absolute Bioavailability of BI 1810631 Administered as Film-coated Tablet Together With an Intravenous Microtracer Dose of BI 1810631 (C-14) (Part B) in Healthy Male Volunteers

Part A - the primary objective is to assess the mass balance and total recovery of [14C]-radioactivity in urine and faeces after oral single dose administration of BI 1810631 (C-14) (test treatment T1) in healthy male subjects.

Part A - the secondary objective is to assess concentrations of BI 1810631 and [14C]-radioactivity in plasma.

Part B - the primary objective is to investigate the absolute bioavailability of BI 1810631 administered as film-coated tablet (test treatment T2, not radio-labelled) compared with BI 1810631 (C-14) (reference treatment R) administered as intravenous microtracer.

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 55 years (inclusive)
3. Body mass index (BMI) of 18.0 to 30.0 kg/m2 (inclusive)
4. Signed and dated written informed consent in accordance with International Council for Harmonisation-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 145 millimetre of mercury (mmHg), diastolic blood pressure outside the range of 45 to 90 mmHg, or pulse rate outside the range of 40 to 100 beats per minute (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