Relative Bioavailability of BI 10773 Administered Twice Daily Compared BI 10773 Given Once Daily After Multiple Oral Doses in Healthy Male and Female Volunteers

To investigate the influence of different dosage regimen (5 mg twice daily versus 10 mg once daily) on the steady state pharmacokinetics and pharmacodynamics of BI 10773 administered orally


Eligibility Criteria:
Inclusion criteria:

- Healthy males and females according to the following criteria: Based upon a complete medical history, including the physical examination, vital signs (BP, PR), 12-lead ECG, clinical laboratory tests

* Age = 18 and Age = 50 years
* BMI = 18.5 and = 29.9 kg/m2 (Body Mass Index)
* Signed and dated written informed consent prior to admission to the study in accordance with 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
* Surgery of the gastrointestinal tract (except appendectomy)
* Diseases of the central nervous system (such as epilepsy) or psychiatric disorders or neurological disorders 6. 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 within one month or less than 10 half-lives of the respective drug prior to first study drug administration except if a relevant interaction can be ruled out
* Participation in another trial with an investigational drug within two months prior to administration or during the trial
* Smoker (\> 10 cigarettes or \> 3 cigars or \> 3 pipes/day)
* Inability to refrain from smoking on trial days
* Alcohol abuse (average consumption of more than 20 g/day in females and 30 g/day in males)
* Drug abuse
* Blood donation (more than 100 mL within four weeks prior to the start of study)
* 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 TdP (e.g., heart failure, hypokalemia, family history of Long QT Syndrome)

For female subjects:

* Positive pregnancy test, pregnancy or planning to become pregnant during the study or within 1 month after study completion
* No adequate contraception during the study and until 1 month after study completion, i.e. not any of the following: implants, injectables, combined oral contraceptives, IUD A record of all subjects screened, in- or excluded, will be maintained. (intrauterine device), sexual abstinence for at least 1 month prior to enrolment, vasectomised partner (vasectomy performed at least 1 year prior to enrolment), or surgical sterilisation (including hysterectomy). Females, who do not have a vasectomised partner, are not sexually abstinent or surgically sterile will be asked to use an additional barrier method (e.g. condom, diaphragm with spermicide)
* Lactation