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Moderate versus intensive treatment of hypertension using amlodipine/valsartan and with the addition of hydrochlorothiazide for patients uncontrolled on angiotensin receptor blocker monotherapy: results in racial/ethnic subgroups.

ABSTRACT: Combination therapy may reduce racial/ethnic differences in response to antihypertensives. In this post-hoc analysis, we evaluated treatment response by race/ethnicity among hypertensive adults enrolled in a 12-week, double-blind study in which patients previously uncontrolled (mean sitting systolic blood pressure [MSSBP] ?150 and <200 mm Hg) on angiotensin receptor blocker (ARB) monotherapy (other than valsartan) for 28 days or more (n = 728) were randomized to amlodipine/valsartan 10/320 mg (intensive) or 5/160 mg (moderate). Treatment-naïve patients (in previous 28 days) or those who failed on a non-ARB first underwent a 28-day run-in period with olmesartan 20 mg or 40 mg, respectively. Hydrochlorothiazide (HCTZ) 12.5 mg was added to both arms at week 4; optional up-titration to 25 mg at week 8 (if MSSBP >140 mm Hg). Intensive treatment provided greater BP lowering versus moderate treatment throughout the study, regardless of race/ethnicity (474 white, 198 African American, 165 Hispanic individuals). Least-square mean reductions from baseline to week 4 in MSSBP (primary outcome) ranged from 20.4 to 23.5 mm Hg (intensive) versus 17.5 to 19.0 mm Hg (moderate), across racial/ethnic subgroups. Both regimens were well tolerated. Amlodipine/valsartan/HCTZ combination therapy was efficacious across racial/ethnic subgroups. Maximal efficacy was obtained with intensive treatment.

SUBMITTER: Ofili EO

PROVIDER: S-EPMC3915530 | biostudies-literature | 2011 Jul-Aug

REPOSITORIES: biostudies-literature

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Moderate versus intensive treatment of hypertension using amlodipine/valsartan and with the addition of hydrochlorothiazide for patients uncontrolled on angiotensin receptor blocker monotherapy: results in racial/ethnic subgroups.

Ofili Elizabeth O EO Oparil Suzanne S Giles Thomas T Pitt Bertram B Purkayastha Das D Hilkert Robert R Samuel Rita R Sowers James R JR

Journal of the American Society of Hypertension : JASH 20110408 4

Combination therapy may reduce racial/ethnic differences in response to antihypertensives. In this post-hoc analysis, we evaluated treatment response by race/ethnicity among hypertensive adults enrolled in a 12-week, double-blind study in which patients previously uncontrolled (mean sitting systolic blood pressure [MSSBP] ≥150 and <200 mm Hg) on angiotensin receptor blocker (ARB) monotherapy (other than valsartan) for 28 days or more (n = 728) were randomized to amlodipine/valsartan 10/320 mg (i ...[more]

PMID: 21482217

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Project description:BACKGROUND:To determine whether the effectiveness and safety of fixed-dose combinations (FDCs) of amlodipine orotate/valsartan (AML/VAL) 5/160?mg are noninferior to those of valsartan/hydrochlorothiazide (VAL/HCTZ) 160/12.5?mg in hypertensive patients with inadequate response to valsartan 160?mg monotherapy. METHODS:This 8-week, active-controlled, parallel-group, fixed-dose, multicenter, double-blind randomized controlled, and noninferiority trial was conducted at 17 cardiovascular centers in the Republic of Korea. Eligible patients had mean sitting diastolic blood pressure (msDBP) ?90?mm?Hg despite monotherapy with valsartan 160?mg for 4 weeks. Patients were randomly assigned to treatment with AML/VAL 5/160?mg FDC (AML/VAL) group or VAL/HCTZ 160/12.5?mg FDC (VAL/HCTZ) group once daily for 8 weeks. A total of 238 patients were enrolled (AML/VAL group, n?=?121; VAL/HCTZ group, n?=?117), of whom 228 completed the study. RESULTS:At 8 weeks after randomization, msDBP was significantly decreased in both groups (-9.44?±?0.69?mm?Hg in the AML/VAL group and -7.47?±?0.71?mm?Hg in the VAL/HCTZ group, both P?<?.001 vs baseline). Between group difference was -1.96?±?1.00?mm?Hg, indicating that AML/VAL 5/160?mg FDC was not inferior to VAL/HCTZ 160/12.5?mg FDC at primary efficacy endpoint. Control rate of BP defined as the percentage of patients achieving mean sitting SBP (msSBP) <140?mm?Hg or msDBP <90?mm?Hg (target BP) from baseline to week 8 was significantly higher in the AML/VAL group than that in the VAL/HCTZ group (84.3% [n?=?102] in the AML/VAL group vs 71.3% [n?=?82] in the VAL/HCTZ group, P?=?.016). At 8 weeks after randomization, mean uric acid level was significantly increased in the VAL/HCTZ group compared to that at baseline (0.64?±?0.08?mg/dL; P?<?.001). However, it was slightly decreased from baseline in the AML/VAL group (-0.12?±?0.08?mg/dL; P?=?.085). The intergroup difference was significant (P?<?.001). CONCLUSION:The effectiveness and safety AML/VAL 5/160?mg FDC are noninferior to those of VAL/HCTZ 160/12.5?mg FDC in patients with hypertension inadequately controlled by valsartan 160?mg monotherapy.

Project description:Ambulatory blood pressure monitoring (ABPM) has greater predictive value than office blood pressure (BP) with respect to hypertension-related target-organ damage and morbidity. ABPM in a subset of 80 patients from the Exforge Target Achievement trial (N=728) was used to compare the efficacy of intensive-treatment and moderate-treatment regimens of amlodipine/valsartan, and to determine whether treatment differences could be better assessed with ABPM than with office or home BP. Home BP was measured on the morning of clinic visits to minimize differences that timing might have on home versus office BP measures.A 12-week randomized, double-blind study in which hypertensive patients earlier uncontrolled (mean sitting systolic BP?150 and <200 mmHg) on angiotensin receptor blocker monotherapy (other than valsartan) after 28 days or more (N=728) were randomized to amlodipine/valsartan treatment [10/320 mg (intensive) or 5/160 mg (moderate)]. Treatment-naive patients (in previous 28 days) or patients who failed on a nonangiotensin receptor blocker agent underwent a 28-day run-in period with a 20-mg or 40-mg dose of olmesartan, respectively.Significantly greater 24-h ABP reductions from baseline to week 4 (primary time point) were observed with intensive versus moderate treatment (least-square mean systolic/diastolic BP reduction of -16.2/-10.1 vs. -9.5/-6.5 mmHg; P=0.0024/P=0.010 for least-square mean difference). Similarly, a significantly greater proportion of patients receiving an intensive treatment achieved ambulatory BP goal (<130/80 mmHg) at week 4 than did those receiving a moderate treatment (P=0.040). Treatment-group differences did not reach statistical significance for these end points when measured by office and home BP.In this first randomized trial evaluating the effects of intensive versus moderate dosing of the combination of amlodipine/valsartan, our data suggest that ABPM was a better method for assessing between-treatment differences than clinic or home BP recordings, although measurement of home BP as a single recording was a limitation of our trial.

Project description:This is a prespecified subgroup analysis in Hispanic and non-Hispanic patients of a study that evaluated blood pressure (BP) control with fixed-dose amlodipine/olmesartan medoxomil (AML/OM)-based therapy in patients whose condition was uncontrolled on prior monotherapy.In this prospective, open-label, dose-titration study, patients with uncontrolled BP after at least 1 month of antihypertensive monotherapy were switched to fixed-dose AML/OM 5/20 mg. Patients were uptitrated to AML/OM 5/40 and 10/40 mg, with uptitration to AML/OM + hydrochlorothiazide 10/40 + 12.5 mg and 10/40 + 25 mg to achieve target BP. The primary efficacy endpoint was the cumulative proportion of patients achieving seated cuff systolic BP (SeSBP) less than 140 mmHg (<130 mmHg in patients with diabetes mellitus) at 12 weeks. Secondary endpoints included SeBP goal rates, ambulatory BP (ABP) target rates, and mean change from baseline in seated cuff BP (SeBP) and ABP at weeks 12 and 20.Mean baseline BP was similar in Hispanics (153.6/92.8 mmHg; n = 105) and non-Hispanics (153.7/91.8 mmHg; n = 894). At 12 weeks, 72.0% of Hispanics and 76.3% of non-Hispanics achieved the primary endpoint. At week 12, goal rates for cumulative SeBP (<140/90 mmHg or <130/80 mmHg in patients with diabetes) were 69.0% and 71.5% in Hispanic and non-Hispanic patients, respectively. Mean change in SeBP in Hispanics ranged from -15.3/-7.3 mmHg for AML/OM 5/20 mg to -23.2/-13.8 mmHg for AML/OM 10/40 mg + hydrochlorothiazide 25 mg, and in non-Hispanics from -14.1/-7.8 mmHg to -25.4/-13.7 mmHg (all p < 0.0001 versus baseline). A majority of patients achieved mean 24 h, daytime, and nighttime ABP targets in both subgroups. Greater proportions of Hispanics achieved ABP targets versus non-Hispanics at week 12; however, this trend was reversed at week 20. Treatment was well tolerated.Switching to a fixed-dose combination of AML/OM ± hydrochlorothiazide provided significant BP lowering and effectively controlled BP in a large proportion of Hispanic and non-Hispanic patients with hypertension uncontrolled on previous monotherapy.

Dataset Information

Moderate versus intensive treatment of hypertension using amlodipine/valsartan and with the addition of hydrochlorothiazide for patients uncontrolled on angiotensin receptor blocker monotherapy: results in racial/ethnic subgroups.

Publications

Moderate versus intensive treatment of hypertension using amlodipine/valsartan and with the addition of hydrochlorothiazide for patients uncontrolled on angiotensin receptor blocker monotherapy: results in racial/ethnic subgroups.

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