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Clin Exp Hypertens. 2009 Nov;31(8):648-56. doi: 10.3109/10641960903407017.

Comparison of effects of low dose of spironolactone and a thiazide diuretic in patients with hypertension treated with an angiotensin-converting enzyme inhibitor or an angiotensin type 1 receptor blocker.

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  • 1Miyashita Naika Clinic, 1-6-7 Gofuku-cho, Shizuoka, Japan. miyashita_0810@ivory.plala.or.jp


This study was performed to investigate the additional anti-hypertensive effects and safety of low-dose thiazide diuretic, trichlormethiazide (TCTZ), and a mineralocorticoid receptor blocker, spironolactone (SPI), as add-on therapy in 64 patients whose blood pressure (BP) at office were over 140/90 mmHg, while receiving anti-hypertensive medication including an angiotensin-converting enzyme inhibitor or angiotensin II type I receptor antagonist. After 6 months, we observed a decrease of office and home BP. Moreover, urinary albumin excretion (UAE) was reduced in SPI-treated group, but not in the TCTZ-treated group. No significant change in serum potassium, lipids, glucose, or uric acid was observed. In conclusion, low-dose thiazide diuretic or SPI provided a significant additional anti-hypertensive effect in patients in whom hypertension was not controlled by medication, and SPI-reduced UAE.

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