A Study to Test How Well Men Tolerate Different Doses of BI 3006337

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 (Temperature, blood pressure (BP), pulse rate (PR)), 12-lead ECG, and clinical laboratory tests
• Age of ≥18 to ≤55 years at screening (SCR)
• BMI of ≥20.0 to <32.0 kg/m2 at SCR
• A minimum absolute body weight (BW) of 70 kilograms (kg) at SCR
• Male subjects who meet any of the following criteria from the administration of trial medication until 30 days after administration of trial medication:

• Use of adequate contraception, e.g. any of the following methods (of female partners) plus condom or sexually abstinence (if lifestyle-related): implants, injectables, vaginal contraceptives, intrauterine device, oral contraception (failure rate <1%). In case of use of oral contraception women should have been stable on the same pill for a minimum of 3 months before taking study treatment.
• Surgically sterilised/vasectomised (including hysterectomy with or without bilateral salpingectomy or bilateral oophorectomy of female partner. In case of salpingectomy or oophorectomy alone, only when the reproductive status of the woman has been confirmed by follow up hormone level assessment).
• Postmenopausal female partner, defined as at least 1 year of spontaneous amenorrhea.
• Signed and dated written informed consent prior to admission to the study, in accordance with Good Clinical Practice (GCP) and local legislation

Exclusion criteria

• Female gender
• Any finding in the medical examination (including BP, PR or ECG) deviating from normal and assessed as clinically relevant by the investigator
• 3 times repeated measurement of systolic BP outside the range of 90 to 150 mmHg, diastolic BP outside the range of 50 to 90 mmHg, or PR outside the range of 40 to 100 bpm. In case of documented white coat hypertension the decision for eligibility is left to the investigator.
• Any laboratory value outside the reference range that the investigator considers to be of clinical relevance, in particular, hepatic parameters Alanine Transaminase (ALT) (1.25xupper limit of normal (ULN)), Aspartate Transaminase (AST) (1.25xULN) and Total Bilirubin (T-BIL) (1.5xULN) or renal parameters (creatinine 1.25xULN) exceeding the Upper Limit of Normal (ULN) as specified: after 2 times repeated measurements
• Any evidence of a concomitant disease assessed as clinically relevant by the investigator
• Clinically relevant gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological or hormonal disorders
• 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
• Chronic or relevant acute infections, including positive tests for Hepatitis (Hep) B antigen/ Hep C antibodies, Human immunodeficiency virus (HIV)-1/2 antibodies and Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2)
• Further exclusion criteria apply