Drug-drug Interaction Between Digoxin, Furosemide, Metformin, and Rosuvastatin

Inclusion criteria: 1. Healthy male subjects according to the investigator´s assessment, based on a complete medical history including a physical examination, vital signs (Blood Pressure, Pulse Rate), 12-lead Electrocardiogram, and clinical laboratory tests 2. Age of 18 to 50 years (incl.) 3. Body Mass Index of 18.5 to 29.9 kg/m2 (incl.) 4. Signed and dated written informed consent prior to admission to the study in accordance with Good Clinical Practice (GCP) and local legislation Exclusion criteria: 1. Any finding in the medical examination (including Blood Pressure, Pulse Rate, or Electrocardiogram) is deviating from normal and judged 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 50 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 judged as clinically relevant by the investigator 5. Gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological, or hormonal disorders 6. Surgery of the gastrointestinal tract that could interfere with kinetics of the trial medication (except appendectomy and 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