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Comparison of benazepril-amlodipine and captopril-thiazide combinations in the management of mild-to-moderate hypertension.

Author(s): Malacco E, Piazza S, Carretta R, Di Somma S, Mugellini A, Bertocchi F, Palatini P, Italian Blood Pressure Study Group

Affiliation(s): Third Division of Internal Medicine, Ospedale L. Sacco, University of Milan, Italy.

Publication date & source: 2002-06, Int J Clin Pharmacol Ther., 40(6):263-9.

Publication type: Clinical Trial; Multicenter Study; Randomized Controlled Trial

OBJECTIVE: To compare the efficacy and tolerability of benazepril 10 mg + amlodipine 5 mg combination (BZ+AM) versus captopril 50 mg + hydrochlorothiazide 25 mg (CP+HT) combination. MATERIAL: 405 outpatients with mild-to-moderate arterial hypertension not adequately controlled by a monotherapy with ACE inhibitors or calcium channel blockers or diuretics entered this multicenter, double-blind, randomized, parallel-group study. METHOD: After a 2-week placebo run-in, 397 patients with sitting diastolic (D) blood pressure (BP) > 95 mmHg and/or sitting systolic (S) BP > 160 mmHg were randomized to receive either BZ+AM (201 patients) or CP+HT (196 patients) once daily for 12 weeks. Main outcome measure was sitting DBP and SBP values at the end of active treatment. The response rate was defined as the proportion of patients with either a final sitting DBP < 90 mmHg or decreased by at least 10 mmHg or a sitting SBP < 150 mmHg or decreased by at least 20 mmHg from baseline. RESULTS: The DBP and SBP values obtained with BZ+AM were, respectively, 2.7 and 3.7 mmHg lower than those obtained with CP+HT (both p < 0.001 vs. CP+HT). The response rate in the BZ+AM group (94.8%) was better than that observed in the CP+HT group (86.0%, p = 0.004). The incidence of adverse events was similar with the 2 treatment regimens (17.9% for both). CONCLUSIONS: These data suggest a higher antihypertensive efficacy of the fixed combination BZ 10 mg+AM 5 mg as compared with CP 50 mg+HT 25 mg.

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