Diuretics: still essential drugs for the management of hypertension

Area of Science:

• Cardiology
• Nephrology
• Pharmacology

Background:

• Current hypertension guidelines often recommend diuretics for specific populations, but these recommendations may be influenced by biased trial data.
• Evidence suggests treatment benefits correlate with blood pressure reduction, challenging claims of pleiotropic effects for newer antihypertensive agents.

Purpose of the Study:

• To re-evaluate the role of diuretics in hypertension management, particularly comparing chlorthalidone with other agents.
• To analyze evidence supporting the superiority of potent, long-acting diuretics like chlorthalidone based on recent trial data.

Main Methods:

• Metaregression analyses to assess the relationship between blood pressure difference and treatment benefits.
• Re-analysis of data from the Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack (ALLHAT) trial.
• Evaluation of findings from the Avoiding Cardiovascular Events in Combination Therapy in Patients Living with Systolic Hypertension (ACCOMPLISH) trial.

Main Results:

• New analyses of the ALLHAT trial indicate chlorthalidone is superior to other agents in preventing end-stage renal disease in diabetics and cardiovascular events in new-onset diabetes.
• Despite evidence, patient adherence to effective therapies has declined in recent trials.
• The ACCOMPLISH trial, using a less potent diuretic (hydrochlorothiazide), has cast doubt on diuretic efficacy, though chlorthalidone's benefits remain evident.

Conclusions:

• Diuretics are essential for managing hypertension.
• Potent, long-acting diuretics such as chlorthalidone should be preferred over less potent agents like hydrochlorothiazide.
• Further research and guideline revisions are needed to reflect the evidence supporting chlorthalidone's efficacy.