• Yves Lacourcière, Jackson T Wright, Rita Samuel, Dion Zappe, Das Purkayastha, Henry R Black, and EVALUATE study.
• Centre Hospitalier de l'Université Laval, Sainte-Foy, Quebec, Canada. yves.lacourciere@crchul.ulaval.ca
• Blood Press Monit. 2009 Jun 1; 14 (3): 112-20.

BackgroundPrevious studies using the combination of angiotensin-receptor blockers and hydrochlorothiazide (HCTZ) have shown superior ambulatory blood pressure (ABP) reduction in study participants with stage 2 hypertension compared with monotherapy.ObjectiveThis multicenter, double-blind, parallel group, forced-titration study of individuals with stage 2 hypertension, compared the efficacy of valsartan and amlodipine in combination with HCTZ on ABP reduction.MethodsAfter a 2-week washout period, participants (n=482) with mean office sitting systolic BP >or=160 mmHg and ResultsAt week 10, changes from baseline in mean office BP were significantly (P<0.0001) decreased by both valsartan/HCTZ (-34.2/-14.2 mmHg) and amlodipine/HCTZ (-34.1/-14.7 mmHg). Changes from baseline in mean 24-h ABP were significantly (P<0.0001) decreased by both valsartan/HCTZ (-21.1/-12.5 mmHg) and amlodipine/HCTZ (-18.1/-9.9 mmHg). However, treatment with valsartan/HCTZ provided significant additional systolic BP (-3.8 mmHg; P=0.0042) and diastolic BP (-2.7 mmHg; P=0.0002) reduction compared with the amlodipine/HCTZ group. The proportion of individuals reaching the office goal BP (<140/80 mmHg) were similar in the valsartan/HCTZ (55.3%) versus amlodipine/HCTZ (54.9%) group, ABP control rates for the recommended ABP goal (<130/80 mmHg) were greater (P=0.0170) in the valsartan/HCTZ group (54.3%) than the amlodipine/HCTZ group (42.7%). Both treatments were well tolerated.ConclusionOn the basis of ABP monitoring but not office measurements, the fixed-dose combination of valsartan/HCTZ is a significantly more effective treatment regimen than amlodipine/HCTZ, with similar tolerability.

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