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Effects of a low dose of indapamide, a diuretic, given daily or every-other-day on blood pressure and metabolic parameters.

Author(s): Inaba M, Noguchi Y, Yamamoto T, Imai T, Hatano M, Yagi S, Katayama S

Affiliation(s): Fourth Department of Medicine, Saitama Medical School, 38 Morohongo, Moroyama-cho, Iruma-gun, Saitama 350-0495, Japan.

Publication date & source: 2004-03, Hypertens Res., 27(3):141-5.

Publication type: Clinical Trial; Randomized Controlled Trial

To investigate the effects of the diuretic, indapamide, on blood pressure (BP) and metabolic parameters, thirty hypertensive patients were treated with 1 mg of indapamide either every day or every other day. BP, fasting plasma glucose, lipids, serum potassium and uric acid were determined at baseline and after 3 months of a stable regimen of the drug. At the termination of the study, 48-h ambulatory blood pressure monitoring (ABPM) was performed. Three patients received only indapamide, while other patients were treated in combination with additional antihypertensive medications. Patients treated with daily indapamide showed a BP reduction from 162 +/- 2.9/85 +/- 2.4 mmHg to 134 +/- 2.4/71 +/-2.6 mmHg (p < 0.001). The BP reduction was similar in those patients receiving the drug every other day (137 +/- 3.4/71 +/- 3.6 mmHg). While plasma lipids and serum potassium did not differ significantly with the intervention, uric acid increased significantly with daily treatment and normalized with every-other-day treatment. Glycosylated hemoglobin A1c (HbA1c) was not altered (5.6 +/- 0.1% vs. 5.4 +/- 0.2%), and did not differ between patients with and without diabetes mellitus. ABPM revealed an average 24-h BP of 134 +/- 3.3/75 +/- 1.7 mmHg on days in which patients received the medication and 139 +/- 4.9/78 +/- 2.6 mmHg on the intervening day without indapamide (no significant difference). These results suggest that a low dose of indapamide given every day or every other day is effective in lowering BP and does not result in metabolic derangements.

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