To investigate safety, tolerability, and pharmacokinetics (PK) of single i.v. doses of BI 1744 CL

Inclusion Criteria:

• Healthy male based upon a complete medical history, including the physical examination, regarding vital signs (blood pressure (BP), pulse rate (PR)), 12-lead ECG measurement, and clinical laboratory tests. There is no finding deviating from normal and of clinical relevance. There is no evidence of a clinically relevant concomitant disease.
• 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 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 medication
• 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 medication
• Participation in another trial with an investigational drug within 2 months prior to medication
• 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 (more than 40 g alcohol a day)
• Drug abuse
• Blood donation (more than 100 mL blood within 4 weeks prior to medication 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 ß2-mimetics:

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