Dose Extension Study of BIIX 1 XX in Healthy Young Male Volunteers

Inclusion Criteria: * Healthy males, based on a complete medical examination * Age range from 21 to 50 years * Participant must be within +/- 20 % of their normal weight (Broca-Index) * Participant must provide written informed consent Exclusion Criteria: * Any finding of the medical examination (including blood pressure, pulse rate and electrocardiogram) or laboratory tests deviating from normal and of clinical relevance * Gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological or hormonal disorders * Diseases of the central nervous system (such as epilepsy) or psychiatric disorders * History of orthostatic hypotension, fainting spells or blackouts * Chronic or relevant acute infections * History of allergy/hypersensitivity (including drug allergy) which is deemed relevant to the trial as judged by the investigator * Intake of a drug with a long half-life (≥ 24 hours) within at least one month or less than then half-lives of the respective drug before enrolment in the study * Use of any drugs which might influence the results of the trial within seven days prior to administration or during the trial * Participation in another trial with an investigational drug within two months prior to start of the study * Smoker (\> 10 cigarettes or 3 cigars or 3 pipes/day) * Inability to refrain from smoking on study days * Alcohol abuse * Drug abuse * Blood donation (\> 100 ml) within four weeks prior to administration * Other disease or abnormality of clinical relevance * Excessive physical activities within two weeks prior to administration or during the trial