Study to investigate safety, tolerability, and pharmacokinetics of single rising peroral doses of BI 1744 CL.

Inclusion Criteria:

• Healthy males according to the following criteria: Based upon a complete medical history, including the physical examination, vital signs (BP, PR), 12-lead ECG, clinical laboratory tests
• Age ≥21 and ≤45 years
• BMI ≥18.5 and <30 kg/m2 (Body Mass Index)
• Signed and dated written informed consent prior to admission to the study in accordance with Good Clinical Practice (GCP) and the local legislation

Exclusion Criteria:

• Any finding of the medical examination (including BP, PR, and ECG measurements) deviating from normal and of clinical relevance
• Evidence of a clinically relevant concomitant disease
• Gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological or hormonal disorders
• Diseases of the central nervous system (such as epilepsy) or psychiatric disorders or neurological disorders
• History of relevant orthostatic hypotension, fainting spells or blackouts
• Chronic or relevant acute infections
• History of relevant allergy/hypersensitivity (including allergy to the drug or its excipients) as judged clinically relevant by the investigator
• Intake of drugs with a long half-life (>24 hours) within at least 1 month or less than 10 half-lives of the respective drug prior to randomisation
• Use of drugs which might reasonably influence the results of the trial based on the knowledge at the time of protocol preparation within 10 days prior to enrolment in the study or during the study
• Participation in another trial with an investigational drug within 30 days prior to randomisation
• Smoker (>10 cigarettes or >3 cigars or >3 pipes/day)
• Inability to refrain from smoking on trial days as judged by the investigator
• Alcohol abuse (regularly more than 40 g alcohol per day)
• Drug abuse
• Blood donation (more than 100 mL blood within 4 weeks prior to randomisation or during the trial)
• Excessive physical activities within 1 week prior to randomisation or during the trial
• Any laboratory value outside the reference range that is of clinical relevance
• Inability to comply with dietary regimen of the study centre

The following exclusion criteria are specific for this study due to the known class side effect profile of β2 mimetic drugs:

• Asthma or history of pulmonary hyperreactivity
• Hyperthyrosis
• Allergic rhinitis in need of treatment
• Clinically relevant cardiac arrhythmia
• Paroxysmal tachycardia (>100 beats per minute)