The objective of the current study is to investigate the bioavailability of BI 10773 and of warfarin after concomitant multiple oral administration of BI 10773 and a single oral dose of warfarin in comparison to BI 10773 and warfarin given alone, and to investigate the pharmacodynamics of a single oral dose of warfarin with and without concomitant multiple oral administration of BI 10773.