Beta blockers, hypertension, and blacks--is the answer really in?

Area of Science:

• Pharmacology
• Cardiology
• Public Health

Background:

• Previous literature suggested beta blockers are ineffective antihypertensives in Black populations.
• Many of these studies had limitations, including small sample sizes and lack of controls.
• Demographics of the US Black population were not adequately represented in earlier research.

Purpose of the Study:

• To re-evaluate the efficacy of beta blockers as antihypertensives in Black populations.
• To address the question of whether sufficient data exists to deem these drugs ineffective for Black hypertensives.

Main Methods:

• Literature review of existing studies on beta blocker efficacy in hypertensive patients.
• Analysis of findings from the largest US study (Veterans Administration Cooperative Study).
• Examination of more recent studies investigating specific types of beta blockers.

Main Results:

• The largest US study indicated propranolol was effective in at least half of Black patients, though less so than in White patients.
• Diuretics were found to be more effective than propranolol in both racial groups.
• More recent studies demonstrate that beta blockers with alpha-antagonistic properties are effective in Black hypertensives.

Conclusions:

• The efficacy of beta blockers in Black hypertensives requires further investigation.
• Existing data may be insufficient to conclude that beta blockers are ineffective for this demographic.
• Beta blockers with alpha-antagonistic properties show promise for treating hypertension in Black individuals.