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CLINICAL TRIAL
COMPARATIVE STUDY
JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL
A multicenter, randomized double-blind study of valsartan/hydrochlorothiazide combination versus amlodipine in patients with mild to moderate hypertension.
Journal of Hypertension 2001 September
OBJECTIVE: To compare the antihypertensive efficacy and tolerability of a once-daily fixed valsartan/hydrochlorothiazide (HCTZ) combination and amlodipine in subjects with mild-to-moderate hypertension.
SUBJECTS AND SETTING: In this multicentre, double-blind, randomized, comparative trial, 690 patients with sitting systolic blood pressure (BP) > or = 160 mmHg and sitting diastolic BP > or = 95 mmHg at the end of a 2-week placebo wash-out period were randomized to valsartan-based treatment (n = 342) or amlodipine (n = 348).
METHODS: The patients received valsartan 80 mg o.d. or amlodipine 5 mg o.d for 4 weeks; in the case of an unsatisfactory blood pressure response, the treatments could be respectively changed to the fixed combination of valsartan 80 mg + HCTZ 12.5 mg o.d. or amlodipine 10 mg o.d. for a further 8 weeks.
RESULTS: Both treatment approaches decreased systolic blood pressure and diastolic blood pressure to the same extent. The rate of responders to treatment at the end of fourth week (before up-titration) was 57.4% among the valsartan-treated patients and 61.9% among the amlodipine-treated patients (ns). At the end of the study, the rate of responders was not significantly different between the two groups (74.9 versus 72.1%). Valsartan-based treatment had a slightly lower incidence of adverse events (1.5 versus 5.5%; P = 0.006).
CONCLUSIONS: The results of this trial demonstrate that the valsartan/hydrochlorothiazide combination and amlodipine are equally effective in lowering BP, and that the combination is better tolerated.
SUBJECTS AND SETTING: In this multicentre, double-blind, randomized, comparative trial, 690 patients with sitting systolic blood pressure (BP) > or = 160 mmHg and sitting diastolic BP > or = 95 mmHg at the end of a 2-week placebo wash-out period were randomized to valsartan-based treatment (n = 342) or amlodipine (n = 348).
METHODS: The patients received valsartan 80 mg o.d. or amlodipine 5 mg o.d for 4 weeks; in the case of an unsatisfactory blood pressure response, the treatments could be respectively changed to the fixed combination of valsartan 80 mg + HCTZ 12.5 mg o.d. or amlodipine 10 mg o.d. for a further 8 weeks.
RESULTS: Both treatment approaches decreased systolic blood pressure and diastolic blood pressure to the same extent. The rate of responders to treatment at the end of fourth week (before up-titration) was 57.4% among the valsartan-treated patients and 61.9% among the amlodipine-treated patients (ns). At the end of the study, the rate of responders was not significantly different between the two groups (74.9 versus 72.1%). Valsartan-based treatment had a slightly lower incidence of adverse events (1.5 versus 5.5%; P = 0.006).
CONCLUSIONS: The results of this trial demonstrate that the valsartan/hydrochlorothiazide combination and amlodipine are equally effective in lowering BP, and that the combination is better tolerated.
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