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Abstract:
(1) The combination of perindopril 4 mg + indapamide 1.25 mg is approved for second-line treatment of hypertension after failure of perindopril alone. (2) The other combination, of a low dose of an angiotensin-converting-enzyme inhibitor (2 mg of perindopril) and a diuretic (0.625 mg of indapamide), is being promoted as first-line treatment of hypertension. (3) The clinical files for both preparations are limited to the strict minimum. (4) A dose-finding study showed that the perindopril 4 mg + indapamide 1.25 mg dose combination offered the best risk-benefit ratio by comparison with combinations containing the same perindopril dose but other indapamide doses. (5) A double-blind trial suggests that the antihypertensive activity of the perindopril 4 mg + indapamide 1.25 mg combination is equivalent to that of the captopril 50 mg + hydrochlorothiazide 25 mg and enalapril 20 mg + hydrochlorothiazide 12.5 mg combinations. The safety profile was the same for the three combinations. (6) The 2-mg perindopril combination has not been compared with perindopril monotherapy at the usual dose of 4 mg, or with indapamide monotherapy at a mean dose of 2.5 mg. (7) The two combinations are costlier than their competitors.