First‑Line Treatment Recommendations for Hypertension in African‑American Adults

Preferred Initial Monotherapy

Thiazide or thiazide‑like diuretics are superior to ACE inhibitors or ARBs for lowering blood pressure and reducing cardiovascular events in Black patients (American College of Cardiology). [1][2]3
Calcium‑channel blockers provide blood‑pressure reduction and cardiovascular‑event protection comparable to thiazide diuretics in this population (American College of Cardiology). [1][2]

Chlorthalidone is the preferred thiazide diuretic because outcome trials show greater cardiovascular‑risk reduction, a longer half‑life, and more consistent 24‑hour blood‑pressure control than hydrochlorothiazide (Trends in Cardiovascular Medicine). Recommended dose: 12.5 – 25 mg once daily. [1][2][4][5]
Amlodipine is the preferred calcium‑channel blocker; its efficacy in lowering blood pressure, preventing cardiovascular disease, and reducing stroke is comparable to chlorthalidone (American College of Cardiology). Recommended dose: 5 – 10 mg once daily. 2
Thiazides are more effective than calcium‑channel blockers at preventing heart‑failure events (American College of Cardiology). 2

The majority of Black patients with hypertension require two or more antihypertensive agents to achieve target blood pressure (American College of Cardiology; Circulation). [1][2]3
When a second agent is needed, combine a thiazide diuretic with a calcium‑channel blocker for optimal efficacy (American College of Cardiology). [1][2]
Single‑tablet fixed‑dose combinations of a thiazide plus a calcium‑channel blocker are especially effective in Black patients (American College of Cardiology). [1][2]
The thiazide + calcium‑channel blocker combination lowers blood pressure in Black patients to a degree comparable with other racial groups (American College of Cardiology). [1][2]

ACE inhibitors and ARBs are less effective as monotherapy for blood‑pressure reduction and cardiovascular‑event prevention in Black patients (American College of Cardiology; Circulation). [1][2]3
Black patients have a higher risk of ACE‑inhibitor‑induced angioedema compared with other racial groups (American College of Cardiology). [1][2]
These agents should be reserved for compelling indications (e.g., diabetes with nephropathy, chronic kidney disease, heart failure) or added as part of combination therapy (American College of Cardiology; Circulation). [1][2]3

Do not start ACE‑inhibitor or ARB monotherapy in Black patients without a compelling indication, as they are less effective than thiazides or calcium‑channel blockers (American College of Cardiology; Circulation). [1][2]3
Avoid hydrochlorothiazide doses below 25 mg daily, because lower doses lack proven outcome benefit (American College of Cardiology). [1][2]
Do not combine ACE inhibitors with ARBs, as this combination is not recommended (American College of Cardiology). [1][2]
Do not delay adding a second medication when monotherapy is insufficient, since most Black patients will need combination therapy (American College of Cardiology). [1][2]

The International Society of Hypertension recommends starting with a low-dose ARB plus either a DHP-CCB or a thiazide/thiazide-like diuretic combination for Black patients 6, 7
For African American patients, thiazide diuretics or calcium channel blockers are more effective in lowering blood pressure than ACE inhibitors or ARBs when used as monotherapy 8, 9
ACE inhibitors like benazepril are less effective as monotherapy in African American patients compared to other racial groups 9

The American College of Cardiology suggests that hydrochlorothiazide should be initiated at 12.5-25 mg daily 9
Higher doses of hydrochlorothiazide (25-50 mg) are more effective for blood pressure control in Black patients 9

Black patients have a greater risk of angioedema with ACE inhibitors compared to other racial groups 9
Most African American patients with hypertension will require two or more antihypertensive medications to achieve adequate blood pressure control 9, 10
A single-tablet combination that includes either a diuretic or a CCB may be particularly effective in achieving BP control in Black patients 9
The target blood pressure should be <130/80 mmHg, with a goal of reducing BP by at least 20/10 mmHg 11, 7

The International Society of Hypertension recommends monitoring blood pressure control and aiming to achieve target within 3 months 6, 7
If blood pressure remains uncontrolled on combination therapy, consider adding a diuretic (if not already included) or increasing to full doses 11, 7

For Black patients with comorbid conditions like CKD or heart failure, ACE inhibitors or ARBs may be indicated as part of the regimen despite reduced efficacy as monotherapy 9
Combination therapy with an ACE inhibitor/ARB plus either a calcium channel blocker or thiazide diuretic produces similar BP lowering in Black patients as in other racial groups 10

In Black patients, ACE inhibitors and ARBs achieve less blood‑pressure reduction and provide weaker cardiovascular event protection when used alone compared with thiazide diuretics or calcium‑channel blockers. 12

When blood pressure remains uncontrolled after two agents (typically a thiazide diuretic plus a calcium‑channel blocker), adding an ACE inhibitor or ARB as a third medication completes the guideline‑recommended triple‑therapy regimen. 12

Initiating therapy with an ACE inhibitor or ARB monotherapy in Black patients without a compelling indication (e.g., diabetic nephropathy, proteinuric chronic kidney disease, or heart failure) is discouraged because of its inferior efficacy relative to thiazides or calcium‑channel blockers. 12