39 In a double-blind controlled clinical trial (n=687 patients evaluated for efficacy) in non-responders to the 80 mg/ 12.5 mg combination, an incremental blood pressure lowering effect of the 80 mg/ 25 mg combination compared to continued treatment with the 80 mg/ 12.5 mg combination of 2.7/ 1.6 mm Hg (SBP/ DBP) was demonstrated (difference in adjusted mean changes from baseline).