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Antihypertensive profiles with ascending dose combinations of ramipril and felodipine ER.

The aim of the study was to identify the most appropriate dosage combination of ramipril and felodipine ER (an extended release tablet) for mild-to-moderate hypertension. Hypertensive patients (N = 507) with supinediastolic blood pressure (DBP) values between 100-115 mm Hg were included in a randomized, multicenter, double-blind study of 3x4 factorial design with a 2-4 week single-blind, placebo run-in and 6 week active treatment phase. The patients were randomized to 12 groups: placebo, ramipril (2.5, 5, 10 mg), felodipine ER (5, 10 mg), or ramipril-felodipine ER combinations (2.5/5 mg, 2.5/10 mg, 5/5 mg, 5/10 mg, 10/5 mg, 10/10 mg). Although the greatest reductions in blood pressure were observed with ramipril-felodipine ER (10/10 mg), consideration of the antihypertensive efficacy and safety factors suggest that the ramipril-felodipine ER (5/5 mg) combination has the best efficacy/tolerability ratio of the combinations tested. The incidence of adverse events with ramipril-felodipine ER combination therapy was similar to that with felodipine ER monotherapy, but peripheral edema, tachycardia and vasodilatation occurred less frequently with ramipril-felodipine ER (5/5 mg) combination than with felodipine ER monotherapy. The combination of ramipril-felodipine ER (5/5 mg) can be considered to be the most suitable option for hypertensive patients with an inadequate response to either of the monocomponents.