Study to investigate the effect of UGT1A1 inhibition by single and multiple oral doses of BI 201335 on the single and multiple oral dose pharmacokinetics of raltegravir and to investigate safety and tolerability.

Inclusion Criteria:

• Healthy males and females
• Age ranging ≥ 21 and ≤ 50 years
• Body mass index (BMI) ≥ 18.5 and ≤ 29.9 kg/m2
• Willing to complete all study-related activities including genotyping
• Volunteers 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 (Electrocardiogram)) deviating from normal and of clinical relevance

• Gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological or hormonal disorders, clinically relevant electrolyte disturbances

• Diseases of the central nervous system (such as epilepsy) or psychiatric disorders or neurological disorders

• History of photosensitivity or recurrent rash

• History of orthostatic hypotension, fainting spells or blackouts

• Chronic or clinically 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 (> 24:00 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 (with the exception of hormonal contraceptives)

• Use of any drugs which might influence the results of the trial up to 7 days prior to enrolment in the trial or during the trial

• Participation in another trial with an investigational drug (within 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 reference range if indicative of underlying disease or poor health

• Excessive physical activities within the last week before the trial or during the trial

• Hypersensitivity to treatment medication and/or related drugs of these classes

• A marked baseline prolongation of QT/QTc interval (e.g., repeated demonstration of a QTcF, or QTcB interval >450 ms)

• Vulnerable subjects (that is persons kept in detention)

• The subject is not able to understand and comply with protocol requirements, instructions and protocol-stated restrictions

• For Female Subjects:

  • Pregnancy
  • Positive pregnancy test
  • Lactation period
  • No adequate contraception: females participating in the study must be either (1) of non-childbearing potential (e.g. surgically sterilized or postmenopausal with no menstrual bleeding for at least 2 years prior the study), or (2) using one of the following contraceptive methods plus condom during the course of the study and up to one month (i.e. one complete menstrual cycle) after the last administration of the study drug (whichever is longer): implants of levonorgestrel or injectable progestogen, oral contraceptive - combined or progestogen only, intrauterine device (IUD)- any IUD with published data showing that the lowest expected failure rate is less than 1% per year (not all IUDs meet this criteria)

• For Male Subjects:

  • No adequate contraception: (1) surgically sterilized or (2) or use a condom plus another form of contraception (e.g. spermicide, IUD, birth control pills taken by female partner, diaphragm with spermicide). Male subjects must not father a child from administration of the first dose and up to 3 months after the last dose of study medication