Study to determine the pharmacokinetic properties of 200 mg (2 x 100 mg tablets once daily) and 300 mg (3 x 100 mg tablets once daily) Nevirapine extended release formulations and to estimate relative bioavailability of these formulations as compared to 200 mg VIRAMUNE® tablet as well as to 400 mg Nevirapine extended release tablet

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; values within normal ranges or deviating from normal without clinical relevance as considered by the investigator
• Values of Liver Function Test (LFT) have to be within normal ranges
• Age ≥18 and Age ≤60 years
• Body Mass Index (BMI) ≥18.5 and BMI ≤29.9 kg/m2
• Subjects must agree to minimize the risk of female partners becoming pregnant from the first dosing day until 3 months after the completion of the post study medical examination. Acceptable methods of contraception comprises barrier contraception and a medically accepted contraceptive method for the female partner (intra-uterine device with spermicide, hormonal contraceptive since at least two month)
• 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) deviating from normal and of clinical relevance
• Any evidence of a clinically relevant concomitant disease
• Gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological or hormonal disorders of clinical relevance
• Surgery of the gastrointestinal tract (except appendectomy and herniotomy)
• 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 drug or its excipients)
• Intake of drugs with a long half-life (>24 hours) within at least one month or less than 10 half-lives of the respective drug prior to administration or during the trial
• 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 administration or during the trial
• Participation in another trial with an investigational drug within two months prior to administration or during the trial
• Participation to trial BI 1100.1485 or any other intake of Nevirapine
• Smoker (>10 cigarettes or >3 cigars or >3 pipes/day)
• Inability to refrain from smoking on trial days
• Alcohol abuse (more than 60 g/day)
• Drug abuse
• Blood donation (more than 100 mL within four weeks prior to administration or during the trial)
• Excessive physical activities (within one week prior to administration or during the trial)
• Any laboratory value outside the reference range that is of clinical relevance
• Inability to comply with dietary regimen of trial site
• A marked baseline prolongation of QT/QTc interval (e.g., repeated demonstration of a QTc interval >450 ms)
• A history of additional risk factors for Torsades des Pointes (e.g., heart failure, hypokalemia, family history of Long QT Syndrome)
• History of disease which affects the present situation
• Inability to understand the protocol requirements, instructions and study-related restrictions, the nature, scope, and possible consequences of the study
• Unlikely to comply with the protocol requirements, instructions and study-related restrictions; e.g., uncooperative attitude, inability to return for follow-up visits, and improbability of completing the study
• Subject is the investigator or any sub-investigator, research assistant, pharmacist, study coordinator, other staff or relative thereof directly involved in the conduct of the study
• Vulnerable subjects (e.g. persons kept in detention)