['healthy']
['placebo to bi 1026706', 'pregabalin', 'bi 1026706', 'celecoxib']

        Inclusion criteria:

          1. Healthy males according to the investigator's assessment, as based on the following
             criteria: a complete medical history including a physical examination, vital signs
             (Blood Pressure, Pulse Rate), 12-lead electrocardiogram, and clinical laboratory

          2. Age 18 to 55 years (incl.)

          3. BMI (Body Mass Index) 18.5 to 29.9 kg/m2 (incl.)

          4. Signed and dated written informed consent prior to admission to the study in
             accordance with GCP and local legislation

        Exclusion criteria:

          1. Any finding in the medical examination (including Blood Pressure, Pulse Rate or
             Electrocardiogram) deviating from normal and judged clinically relevant by the
             investigator

          2. Repeated measurement of systolic blood pressure greater than 140 mm Hg or diastolic
             blood pressure greater than 90 mm Hg

          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 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 study
             drug(s)

          7. Diseases of the central nervous system (such as epilepsy), other neurological
             disorders or psychiatric disorders
      