With the linagliptin @ mg/metformin @ mg dose , the adjusted geometric mean ratio of the SPC to the separate tablets for linagliptin was @ % ( @ % confidence interval ( CI ) : @-@ @ ) for AUC@-@ and @ % ( @ % CI : @-@ @ ) for Cmax ; for metformin the ratio was @ % ( @ % CI : @-@ @ ) for AUC@-tz and @ % ( @ % CI : @-@ @ ) for Cmax .