Effect of Different Boosting Agents on Pharmacokinetics of BILR 355 BS Dissolved in Polyethylene Glycol 400 (PEG 400) in Healthy Male Volunteers

An Open Study to Investigate the Effect of Different Boosting Agents on Pharmacokinetics of Single Doses of BILR 355 BS (Dose Steps: 5 and 12.5 mg) Dissolved in 5 mL PEG 400 After Oral Administration in Healthy Male Volunteers

Assessment of the effect of different boosting agents on pharmacokinetics of a single dose of BILR 355 BS dissolved in PEG 400

Inclusion Criteria:

• All participants in the study were to be healthy males, range from 21 to 50 years of age and their body mass index (BMI) be within 18.5 to 29.9 kg/m2 (BMI calculation: weight in kilograms divided by the square of height in meters)
• In accordance with good clinical practice (GCP) and the local legislation all volunteers had to give their written informed consent prior to admission to the study

Exclusion Criteria:

• Any finding of the medical examination (including blood pressure, pulse rate and ECG) 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 or neurological 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 drugs with a long half-life (> 24 hours) within at least one month or less than ten half-lives of the respective drug before enrolment in the study or during the study
• Use of any drugs which might influence the results of the trial up to 7 days prior to enrolment in the study or during the study
• Participation in another trial with an investigational drug (<= two months prior to administration or during the trial)
• Smoker (> 10 cigarettes or > 3 cigars of > 3 pipes/day)
• Inability to refrain from smoking on trial days
• Alcohol abuse (> 60 g/day)
• Drug abuse
• Blood donation (>= 100 mL within four weeks prior to administration or during the trial)
• Any laboratory value outside the clinically accepted reference range
• Excessive physical activities within the last week before the trial or during the trial

Following exclusion criteria are of special interest for this study:

• Erythema, exanthema and comparable skin alterations
• For the boosting agents atazanavir and atazanavir plus ritonavir, subjects with a PQ interval length in the screening ECG of > 200 ms or any higher degree of atrio-ventricular (AV) block were to be excluded