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Diuretics for Hypertension: A Review and Update
George C Roush1, Domenic A Sica2
1Department of Medicine, UCONN School of Medicine, Bridgeport, Connecticut, USA; groush@gcr0.com.
American Journal of Hypertension
|April 7, 2016
Summary
Diuretics are crucial for hypertension management. This review highlights differences in potency and effectiveness among thiazide-related, potassium-sparing, and loop diuretics, emphasizing individualized treatment for better cardiovascular outcomes.
Area of Science:
- Pharmacology
- Cardiovascular Medicine
- Nephrology
Background:
- Diuretics are the second most prescribed antihypertensives, with thiazide-related agents showing significant growth.
- Recent hypertension guidelines emphasize diuretics, especially for salt-sensitive and resistant hypertension.
- Clinical practice often overlooks specific diuretic differences, impacting treatment efficacy.
Purpose of the Study:
- To review and update the clinical features of various diuretic classes used in hypertension management.
- To compare the potency and cardiovascular event reduction efficacy of different diuretics.
- To underscore the importance of differentiating diuretic agents for optimal patient care.
Main Methods:
- Review of clinical features of hydrochlorothiazide, chlorthalidone, indapamide, potassium-sparing agents, and loop diuretics.
- Analysis of comparative potency and efficacy data from randomized trials and network analyses.
- Synthesis of evidence regarding the impact of diuretic combinations on cardiovascular outcomes.
Main Results:
- Hydrochlorothiazide is less potent than chlorthalidone and indapamide in 24-hour and office measurements, respectively.
- Hydrochlorothiazide demonstrated lower efficacy in reducing cardiovascular events compared to enalapril, amlodipine, chlorthalidone, and HCTZ-amiloride.
- Potassium-sparing agents, when combined with thiazides, reduce ventricular ectopy and sudden cardiac death risk.
- Relative potencies of spironolactone, amiloride, and eplerenone vary significantly, with spironolactone and eplerenone showing additional benefits in proteinuria reduction and endothelial function.
Conclusions:
- Significant differences exist in the potency and cardiovascular efficacy among various diuretic agents.
- Individualized selection of diuretics, considering their specific properties, is crucial for effective hypertension management.
- Combining thiazide-type diuretics with potassium-sparing agents offers additional cardiovascular benefits.
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