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ACE inhibitors versus diuretics: ALLHAT versus ANBP2
1School of Biomedical Sciences, The University of Queensland, QLD 4072, Australia. s_doggrell@yahoo.com
Expert Opinion on Pharmacotherapy
|May 13, 2003
Summary
Thiazide-type diuretics are recommended for high-risk hypertension patients. However, for healthy elderly individuals, angiotensin-converting enzyme inhibitors may be preferred over diuretics for better cardiovascular outcomes.
Area of Science:
- Cardiology
- Pharmacology
- Clinical Trials
Background:
- The Antihypertensive and Lipid-Lowering treatment to prevent Heart Attack Trial (ALLHAT) compared chlorthalidone, amlodipine, and lisinopril in hypertensive patients with CHD risk factors.
- The Second Australian National Blood Pressure Study (ANBP2) compared hydrochlorothiazide and enalapril in older hypertensive patients with fewer cardiovascular events.
Discussion:
- Chlorthalidone showed a slightly greater reduction in systolic blood pressure compared to amlodipine and lisinopril in ALLHAT.
- No significant differences in the primary outcome (fatal CHD and nonfatal myocardial infarction) were found between the compared drugs in ALLHAT.
- ANBP2 indicated a similar diastolic blood pressure reduction between diuretics and ACE inhibitors.
- ANBP2 reported an 11% lower risk of cardiovascular events or death in the ACE inhibitor group compared to the diuretic group, predominantly in men.
Key Insights:
- ALLHAT findings support thiazide-type diuretics as a first-line therapy for at-risk hypertensive patients.
- ANBP2 suggests ACE inhibitors may be preferable to diuretics in relatively healthy elderly hypertensive patients.
Outlook:
- Further research may explore long-term outcomes and specific patient subgroups for optimal antihypertensive drug selection.
- Comparative effectiveness of different antihypertensive drug classes remains a critical area for cardiovascular disease prevention.