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A long-term, double-blind, comparative study on quality of life during treatment with amlodipine or enalapril in mild or moderate hypertensive patients: a multicentre study.

Author(s): Omvik P, Thaulow E, Herland OB, Eide I, Midha R, Turner RR

Affiliation(s): Medical Department, Haukeland Hospital, Bergen, Norway.

Publication date & source: 1994-05, Br J Clin Pract Suppl., 73:23-30.

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

The efficacy, tolerability and impact on quality of life of amlodipine and enalapril were compared in a multicentre, double-blind, general practice study in 461 mild and moderate hypertensives over a 50-week active treatment period. Amlodipine (5-10 mg, once daily) and enalapril (10-40 mg, once daily) were found to be similarly effective in lowering blood pressure while not adversely affecting quality-of-life parameters. However, 20% of the enalapril group compared with 11% of the amlodipine group required the addition of hydrochlorothiazide for blood pressure control (P < 0.01). Diastolic blood pressure was normalised or reduced by 10 mmHg in 204 (90%) patients on amlodipine and in 190 (85%) patients on enalapril. Side-effects were, in general, mild or of little clinical significance. The major side-effects recorded were class-typical of ACE inhibitors and calcium antagonists, namely cough (enalapril) and oedema (amlodipine), respectively. Tolerability was very good, with only 17 patients (8 amlodipine, 4%; 9 enalapril, 4%) being withdrawn from the study due to side-effects definitely related to treatment. Amlodipine monotherapy produced a slightly beneficial effect on blood lipid concentration, and both drugs reduced the calculated 10-year risk of coronary heart disease. It was concluded that the calcium antagonist amlodipine compared favourably with the ACE inhibitor enalapril in terms of antihypertensive efficacy, tolerability and impact on quality of life.

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