Hypertension Treatment Guidelines
For most adults with confirmed hypertension (BP ≥140/90 mmHg), initiate combination pharmacologic therapy with an ACE inhibitor or ARB plus a calcium channel blocker or thiazide-like diuretic, preferably as a single-pill combination, alongside lifestyle modifications targeting a BP goal of <130/80 mmHg. 1, 2
Diagnosis and Confirmation
Hypertension is diagnosed when office BP ≥140/90 mmHg confirmed on 2-3 separate visits 1. However, office readings should be confirmed with:
- Home BP monitoring: ≥135/85 mmHg indicates hypertension 1
- 24-hour ambulatory monitoring: ≥130/80 mmHg confirms diagnosis 1
Use validated automated upper arm cuff devices with appropriate cuff size. Measure BP in both arms at first visit; use the arm with higher readings for subsequent measurements 1.
Blood Pressure Classification
- Normal: <130/85 mmHg
- Elevated/High-normal: 130-139/85-89 mmHg
- Grade 1 Hypertension: 140-159/90-99 mmHg
- Grade 2 Hypertension: ≥160/100 mmHg 1, 3
Lifestyle Modifications (Essential for All Patients)
Implement these interventions immediately for all patients with elevated BP or hypertension 1, 3, 4:
- Dietary sodium restriction: <1500 mg/day (or reduce by ≥1000 mg/day)
- Increase dietary potassium: 3500-5000 mg/day
- DASH diet: Rich in fruits, vegetables, whole grains, low-fat dairy; reduced saturated fat 5, 4
- Weight loss: Target ideal body weight or minimum 1 kg reduction if overweight 4
- Physical activity: 90-150 minutes/week of aerobic exercise or dynamic resistance training 4
- Alcohol moderation: ≤2 drinks/day (men), ≤1 drink/day (women) 4
- Smoking cessation 1
When to Initiate Pharmacologic Therapy
Immediate Drug Treatment Required:
Grade 2 Hypertension (≥160/100 mmHg): Start medications immediately regardless of risk 1
Grade 1 Hypertension (140-159/90-99 mmHg) with high-risk features: Start medications immediately if patient has 1:
- Cardiovascular disease (CVD)
- Chronic kidney disease (CKD)
- Diabetes mellitus
- Target organ damage
- Age 50-80 years
Delayed Drug Treatment (After 3-6 Months Lifestyle Trial):
Grade 1 Hypertension in low-moderate risk patients: If BP remains ≥140/90 mmHg after 3-6 months of lifestyle modifications 1
Elevated BP (130-139/80-89 mmHg): Consider medications after 3-6 months if BP remains elevated AND patient has ≥7.5% 10-year CVD risk 3
First-Line Pharmacologic Therapy
Non-Black Patients:
Step 1: Low-dose ACE inhibitor or ARB
Step 2: Add dihydropyridine calcium channel blocker (DHP-CCB)
Step 3: Increase to full doses
Step 4: Add thiazide/thiazide-like diuretic
Step 5: Add spironolactone (or if contraindicated: amiloride, doxazosin, eplerenone, clonidine, or beta-blocker) 1
Black Patients:
Step 1: Low-dose ARB + DHP-CCB OR DHP-CCB + thiazide/thiazide-like diuretic
Step 2: Increase to full doses
Step 3: Add diuretic or ARB/ACE inhibitor
Step 4: Add spironolactone (or alternatives as above) 1
Key Prescribing Principles:
- Prefer single-pill combinations to improve adherence 1, 2
- Start with 2-drug combination for most patients with confirmed hypertension (BP ≥140/90 mmHg) 2
- Consider monotherapy only for: low-risk Grade 1 hypertension, patients >80 years, or frail elderly 1
- Once-daily dosing preferred for adherence 1
- Do NOT combine two RAS blockers (ACE inhibitor + ARB) 2
Blood Pressure Targets
Primary target: <130/80 mmHg for most adults 1, 3
Alternative target: 120-129 mmHg systolic if well-tolerated 2
Elderly/frail patients: Individualize based on frailty; may target <140/90 mmHg 1
Patients with diabetes or CKD: <130/80 mmHg 6, 1
Achieve target within 3 months of initiating therapy 1
Special Populations
Diabetes:
- ACE inhibitor or ARB preferred, especially if albuminuria present 6, 1
- Target <130/80 mmHg 6
- Monitor renal function and potassium 6
Chronic Kidney Disease:
- RAS inhibitors first-line (reduce albuminuria) 1
- Add CCBs and diuretics (loop diuretics if eGFR <30 mL/min/1.73m²) 1
- Target <130/80 mmHg 1
Coronary Artery Disease:
Heart Failure:
- RAS blockers, beta-blockers, mineralocorticoid receptor antagonists for HFrEF 1
- Consider ARNI (sacubitril-valsartan) as alternative to ACE inhibitor/ARB 1
- Target <130/80 mmHg but >120/70 mmHg 1
Patients >80 Years:
- Continue treatment if well-tolerated 2
- May use higher threshold (≥160 mmHg systolic) for initiation 7
- Consider monotherapy initially 1
Monitoring
- Monthly visits until BP controlled 5
- Every 3-6 months once controlled 5
- Home BP monitoring strongly recommended for ongoing management 3
- Check adherence regularly 1
- Monitor for adverse effects (hypotension, electrolyte abnormalities, acute kidney injury) 8
Resistant Hypertension
Defined as BP ≥130/80 mmHg despite 3 medications (including diuretic) at maximal doses 9.
Exclude first:
- White-coat hypertension (confirm with home/ambulatory monitoring) 9
- Medication nonadherence (~50% of cases) 9
- Secondary causes (primary aldosteronism in 5-25%) 9
Management:
- Switch to chlorthalidone if using hydrochlorothiazide 9
- Add spironolactone 25-50 mg/day (if eGFR ≥45 mL/min/1.73m² and K+ ≤4.5 mmol/L) - reduces SBP by ~13 mmHg 9
- Consider renal denervation in select cases (reduces 24-hour ambulatory SBP by ~4.4 mmHg) 9
- Refer to hypertension specialist 1
Critical Pitfalls to Avoid
- Do not rely solely on office BP - confirm with home or ambulatory monitoring to exclude white-coat hypertension 1, 3
- Do not use beta-blockers as first-line unless compelling indication (post-MI, heart failure, angina) 2
- Do not combine ACE inhibitor + ARB - increases adverse effects without benefit 2
- Do not use cuffless devices (smartwatches) for diagnosis - insufficient accuracy 3
- Do not delay treatment in Grade 2 hypertension - start immediately 1
- Do not undertitrate - most patients need 2-3 medications to reach target 1, 4