Evaluation of Photosafety of BI 730357 Compared to Placebo and the Known Photosensitizing Agent Ciprofloxacin

Inclusion Criteria: * Healthy male and female subjects according to the assessment of the Investigator, based on a complete medical history, physical examination (including dermatological skin type assessment), vital signs (blood pressure, pulse rate), 12-lead ECG, and clinical laboratory tests * 18 to 55 years old * BMI 18 to 35 kg/m (incl.) * Fitzpatrick skin type I, II, or III: * I Always burns easily, never tans * II Always burns easily, tans minimally * III Burns moderately, tans gradually * No ultraviolet exposure of the test areas 4 weeks prior to baseline photo testing * Normal skin response during preliminary photo testing. * Signed and dated written informed consent in accordance with ICH-GCP and local legislation prior to admission to the trial. * Women of childbearing potential (WOCBP)1 must be ready and able to use highly effective methods of birth control per ICH M3 (R2) that result in a low failure rate of less than 1% per year when used consistently and correctly. A list of contraception methods meeting these criteria is provided in the patient information Exclusion Criteria: * Any finding in the medical examination (including blood pressure, pulse rate or ECG) deviating from normal and judged as clinically relevant by the Investigator. * Any laboratory value outside the reference range that the Investigator considers to be of clinical relevance. * Gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological or hormonal dis…