Medications for Hypertension (High Blood Pressure)
ICD-10: I10
Medically Reviewed by Dr. Sarah Chen, PharmD, BCPS
Clinical Pharmacist & Medical Reviewer
Last reviewed: March 19, 2026
Key Takeaways
- Hypertension affects nearly half of US adults and is the leading modifiable risk factor for heart attack and stroke.
- ACE inhibitors, ARBs, calcium channel blockers, and thiazide diuretics are all recommended first-line agents with equivalent blood-pressure-lowering efficacy.
- Most patients require 2 or more medications to reach goal BP (<130/80 mmHg per ACC/AHA 2017 guidelines).
- Generic antihypertensives are highly affordable — lisinopril and amlodipine are available for $4–$15/month.
- Lifestyle modifications (DASH diet, weight loss, sodium restriction, exercise) can lower systolic BP by 4–11 mmHg and should accompany all pharmacologic therapy.
Overview
Hypertension affects nearly half of American adults and is a major risk factor for heart disease, stroke, and kidney disease. It is often called the 'silent killer' because it typically has no symptoms.
Treatment Overview
Treatment includes lifestyle changes (DASH diet, exercise, sodium reduction, weight loss) and medications. First-line drug classes include ACE inhibitors, ARBs, thiazide diuretics, and calcium channel blockers.
50
Total Medications
4
Drug Classes
1
Off-Label Uses
Drug Classes for Hypertension (High Blood Pressure)
Pharmacist-reviewed overview of each medication class, how it works, and when it's used.
ACE Inhibitors
ACEi
Mechanism of Action
Block the angiotensin-converting enzyme (ACE), preventing conversion of angiotensin I to angiotensin II. This reduces vasoconstriction and aldosterone secretion, lowering blood pressure.
Common Examples
Clinical Notes
Preferred in patients with diabetes, chronic kidney disease, or heart failure with reduced ejection fraction. Contraindicated in pregnancy and bilateral renal artery stenosis.
Common Side Effects
- Dry cough (10–15% of patients)
- Hyperkalemia
- Angioedema (rare but serious)
- Acute kidney injury in volume-depleted patients
Angiotensin Receptor Blockers
ARBs
Mechanism of Action
Block the angiotensin II type 1 (AT1) receptor directly, producing similar BP reduction to ACE inhibitors without generating bradykinin (which causes cough).
Common Examples
Clinical Notes
Preferred alternative to ACE inhibitors when ACE inhibitor–induced cough occurs. Same renal and cardiac protective indications. Never combine with an ACE inhibitor.
Common Side Effects
- Hyperkalemia
- Acute kidney injury (rare)
- Angioedema (less common than ACEi)
- Dizziness
Calcium Channel Blockers
CCBs
Mechanism of Action
Block L-type voltage-gated calcium channels in vascular smooth muscle and cardiac cells, causing vasodilation and (for non-dihydropyridines) reduced heart rate.
Common Examples
Clinical Notes
Dihydropyridines (amlodipine, nifedipine) are preferred for hypertension. Non-dihydropyridines (diltiazem, verapamil) also slow heart rate and are useful in atrial fibrillation but should be avoided in heart failure with reduced EF.
Common Side Effects
- Peripheral edema (most common with amlodipine)
- Flushing
- Headache
- Constipation (especially verapamil)
- Bradycardia (non-dihydropyridines)
Thiazide Diuretics
Thiazides
Mechanism of Action
Inhibit the sodium-chloride cotransporter in the distal convoluted tubule, increasing sodium and water excretion. Also cause direct vasodilation with long-term use.
Common Examples
Clinical Notes
Chlorthalidone is preferred over HCTZ due to longer half-life and superior outcomes data. Particularly effective in Black patients and older adults. Often used as add-on therapy.
Common Side Effects
- Hypokalemia
- Hyponatremia
- Hyperuricemia (may precipitate gout)
- Glucose intolerance
- Photosensitivity
Beta-Blockers
Beta-Blockers
Mechanism of Action
Competitively block catecholamine binding at β-adrenergic receptors, reducing heart rate, myocardial contractility, and renin release.
Common Examples
Clinical Notes
Not recommended as first-line monotherapy for uncomplicated hypertension per current guidelines, but preferred when hypertension coexists with heart failure, post-MI, or certain arrhythmias.
Common Side Effects
- Fatigue
- Bradycardia
- Bronchospasm (avoid in asthma)
- Cold extremities
- Masking hypoglycemia symptoms in diabetics
All Medications
FDA-approved and commonly used medications for Hypertension (High Blood Pressure) in our database.
How to Choose the Right Medication
Clinical decision factors used by prescribers when selecting a treatment.
- 1For most patients without compelling indications, any of the four first-line classes (ACEi, ARB, CCB, thiazide) is appropriate — choose based on comorbidities and tolerability.
- 2Prefer ACEi or ARB in patients with diabetes, CKD, or heart failure with reduced EF.
- 3Prefer CCB or thiazide in Black patients, where ACEi/ARB monotherapy is less effective.
- 4Prefer beta-blockers when hypertension accompanies heart failure, post-MI, or angina.
- 5For patients requiring two drugs, ACEi/ARB + CCB or ACEi/ARB + thiazide combinations have the best outcomes data.
- 6Fixed-dose combination pills improve adherence and are widely available as generics.
Monitoring & Follow-Up
- Recheck BP 1 month after initiating or changing therapy.
- Monitor serum potassium and creatinine 1–2 weeks after starting ACEi, ARB, or potassium-sparing diuretics.
- Home blood pressure monitoring (average of 2 readings, twice daily for 1 week) is more predictive of outcomes than office readings.
- Assess for white-coat hypertension with ambulatory BP monitoring if office readings are elevated but patient is asymptomatic.
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Frequently Asked Questions
What blood pressure reading is considered high?
A blood pressure of 130/80 mmHg or higher is classified as hypertension by current guidelines. Normal blood pressure is below 120/80 mmHg.
Do I need to take blood pressure medication for life?
For most people with primary (essential) hypertension, medication is a long-term commitment. However, significant lifestyle changes — losing 10+ lbs, adopting the DASH diet, reducing sodium, and exercising regularly — can lower BP enough that some patients are able to reduce or discontinue medication under physician supervision. Never stop antihypertensive medication without consulting your provider.
What is the difference between ACE inhibitors and ARBs?
Both ACE inhibitors and ARBs block the renin-angiotensin-aldosterone system (RAAS) and have similar blood-pressure-lowering efficacy and organ-protective effects. The key practical difference is that ACE inhibitors cause a dry, persistent cough in 10–15% of patients (due to bradykinin accumulation), while ARBs do not. If you develop a cough on an ACE inhibitor, switching to an ARB is the standard approach.
References & Clinical Sources
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Medical Disclaimer
The information on RxGuide is intended for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician, pharmacist, or other qualified health provider with any questions you may have regarding a medical condition or medication. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.