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  • Title: Combination therapy with olmesartan medoxomil and hydrochlorothiazide: secondary analysis of the proportion of patients achieving recommended blood pressure goals from a randomized, double-blind, factorial study.
    Author: Chrysant SG, Chavanu KJ, Xu J.
    Journal: Am J Cardiovasc Drugs; 2009; 9(4):241-51. PubMed ID: 19655819.
    Abstract:
    BACKGROUND: The combination of olmesartan medoxomil and hydrochlorothiazide (HCTZ) [olmesartan medoxomil/HCTZ] has previously been shown to produce significantly greater SBP/DBP reductions than monotherapy with either agent alone in a randomized, double-blind, factorial study in patients with stage 2 hypertension. Compared with the evaluation of a single mean BP reduction in a patient population, determining the efficacy of an antihypertensive agent in achieving multiple BP targets provides additional information about the range of BP reductions attainable within this study population. OBJECTIVE: To conduct a secondary analysis of this study to evaluate the proportion of patients achieving combined SBP/DBP targets recommended in current hypertension treatment guidelines as well as individual SBP and DBP targets. METHODS: A total of 502 patients with DBP >or=100 and <or=115 mmHg were randomized to 8 weeks of treatment with placebo, HCTZ 12.5 or 25 mg/day, olmesartan medoxomil 10, 20, or 40 mg/day, or olmesartan medoxomil/HCTZ 10/12.5, 10/25, 20/12.5, 20/25, 40/12.5, or 40/25 mg/day. Mean baseline SBP ranged from 151.9 to 156.6 mmHg and mean baseline DBP ranged from 102.6 to 104.4 mmHg across the twelve treatment arms. The chi-squared test was used to compare the proportion of patients achieving each BP goal in each of the 11 active treatment regimens with that in the placebo group. RESULTS: The proportion of patients achieving an SBP <140 or <130 mmHg, DBP <90, <85, or <80 mmHg and combined SBP/DBP <140/90, <130/85, <130/80, or <120/80 mmHg typically increased with escalating dosages of olmesartan medoxomil and HCTZ when administered alone or in combination, but was always highest in those treated with the combination. As the BP goal became progressively more stringent, the proportion of patients achieving the BP goal decreased in each treatment group, although the trend toward greater reductions in patients treated with combination therapy remained intact. All combined SBP/DBP goals were achieved by a statistically significant proportion of patients (p < 0.05) in the olmesartan medoxomil/HCTZ 20/25, 40/12.5, and 40/25 treatment groups. CONCLUSIONS: A majority of patients with uncomplicated stage 2 hypertension can achieve recommended BP goals when treated with the combination of olmesartan medoxomil and HCTZ.
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