First-Line Antihypertensive Medications and Dosing for Adults
The first-line antihypertensive drugs are thiazide/thiazide-like diuretics (preferably chlorthalidone), ACE inhibitors, ARBs, and calcium channel blockers, with most patients requiring combination therapy from the start. 1
Initial Drug Selection
Four First-Line Drug Classes
The following four drug classes have demonstrated the most effective reduction in blood pressure and cardiovascular events 1:
- Thiazide/thiazide-like diuretics (chlorthalidone, hydrochlorothiazide, indapamide)
- ACE inhibitors (lisinopril, enalapril, ramipril)
- Angiotensin receptor blockers (ARBs) (candesartan, losartan, valsartan)
- Calcium channel blockers (CCBs) (amlodipine, nifedipine)
Preferred Thiazide Diuretic
Chlorthalidone is preferred over hydrochlorothiazide because it was used in landmark cardiovascular outcome trials and demonstrated superiority to amlodipine in preventing heart failure and to lisinopril in preventing stroke. 1, 2
Beta-Blockers: Not First-Line
Beta-blockers are not recommended as first-line therapy for uncomplicated hypertension because they are less effective than thiazide diuretics (30% lower risk) and CCBs (36% lower risk) for stroke prevention. 1 They should be reserved for specific compelling indications such as post-myocardial infarction, heart failure with reduced ejection fraction, or angina. 1
Monotherapy vs. Combination Therapy
Stage 2 Hypertension (BP ≥140/90 mmHg or >20/10 mmHg above target)
Initiate with two-drug combination therapy using agents from different classes, preferably as a single-pill combination. 1 The preferred combinations are:
- RAS blocker (ACE inhibitor or ARB) + CCB
- RAS blocker (ACE inhibitor or ARB) + thiazide diuretic
- CCB + thiazide diuretic
Stage 1 Hypertension (BP 130-139/80-89 mmHg)
Single-drug therapy is reasonable for stage 1 hypertension with a BP goal <130/80 mmHg, followed by dosage titration and sequential addition of other agents as needed. 1
Single-Pill Combinations
Single-pill combinations are strongly recommended because they improve treatment adherence compared to separate agents, though they may contain lower-than-optimal doses of the thiazide component. 1
Race-Specific Considerations
Black Patients
For Black adults with hypertension (without heart failure or CKD), initial therapy should include a thiazide-type diuretic or CCB. 1
ACE inhibitors are notably less effective than CCBs in Black patients for preventing heart failure and stroke. 1 Two or more antihypertensive medications are typically required to achieve BP targets <130/80 mmHg in Black adults. 1
Treatment Escalation Algorithm
If BP Not Controlled on Two Drugs
Escalate to triple therapy with a RAS blocker + CCB + thiazide/thiazide-like diuretic, preferably in a single-pill combination. 1
If BP Still Not Controlled on Triple Therapy
Add spironolactone, another diuretic, alpha-blocker, or beta-blocker, and consider referral to a specialist center. 1
Contraindicated Combination
Never combine an ACE inhibitor with an ARB simultaneously—this combination is not recommended. 1
Blood Pressure Targets
Target BP <130/80 mmHg for most adults, with the 2024 ESC guidelines recommending a systolic BP target of 120-129 mmHg when well tolerated. 1, 3 For adults ≥65 years, target systolic BP <130 mmHg. 1, 3
Common Pitfalls to Avoid
- Do not use beta-blockers as first-line therapy for uncomplicated hypertension—they are less effective for stroke prevention 1
- Do not use alpha-blockers as first-line therapy—they are less effective than thiazide diuretics for CVD prevention 1
- Do not start with monotherapy in patients with BP >20/10 mmHg above target—they require combination therapy from the start 1
- Avoid single-agent ACE inhibitors in Black patients without compelling indications—use thiazide diuretics or CCBs instead 1