In a randomized, double-blind, parallel-group study of middle-aged and elderly patients, we examined the effects of treatment with the angiotensin receptor blocker valsartan (Val) in combination with hydrochlorothiazide (HCTZ) on pulse pressure (PP). After a 2-week washout period, patients entered a 4-week single-blind Val 160 mg once daily run-in period before randomization to one of three treatment groups: Val 160 mg (n = 666), Val 160 mg/HCTZ 12.5 mg (n = 670) or Val 160 mg/HCTZ 25 mg (n = 666), once daily for eight weeks. Sitting PP at baseline was similar in all groups. From baseline to randomization, Val monotherapy reduced PP by 4.7 +/- 10.2 mmHg (mean +/- SD). At the end of the study, overall reductions in PP were 6.7 mmHg for Val 160/HCTZ 12.5 and 7.5 mmHg for Val 160/HCTZ 25. Val monotherapy reduced PP in mild-to-moderate hypertensive patients. Val combined with HCTZ provides an additional dose-related reduction in PP.
