Candesartan
Prescription ·Exploratory record · not publication-reviewed ·Updated July 13, 2026
Candesartan is an angiotensin II receptor blocker (ARB) used to treat high blood pressure and chronic heart failure with reduced ejection fraction. It is administered as the prodrug candesartan cilexetil, which is rapidly converted to active candesartan during absorption from the gastrointestinal tract. By blocking the AT1 receptor it lowers blood pressure and reduces cardiovascular strain with a once-daily dosing profile.
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What the research says.
A quick, data-only summary. The full evidence, dosing, and sources are below.
Candesartan is an angiotensin II receptor blocker (ARB) used to treat high blood pressure and chronic heart failure with reduced ejection fraction. NutriStack rates the supporting evidence as strong. Common adult dosing is Hypertension: usually 8 to 32 mg once daily (typical starting dose 16 mg). Heart failure: start 4 mg once daily and titrate by doubling at intervals of about 2 weeks as tolerated to a target of 32 mg once daily., though a prescriber sets the actual dose. This profile indexes 4 sources.
The bottom line
Evidence rating strong. Most-documented uses: lowers blood pressure in essential hypertension, reduces cardiovascular morbidity and mortality in chronic heart failure with reduced ejection fraction, reduces heart failure hospitalizations. 4 sources indexed (2003–2018), with 0 interaction records on file.
How it works, mechanistically.
Core mechanism
Candesartan selectively and competitively antagonizes the angiotensin II type 1 (AT1) receptor. By preventing angiotensin II from binding to AT1 receptors in vascular smooth muscle and the adrenal cortex, it inhibits angiotensin II mediated vasoconstriction and aldosterone secretion. The resulting vasodilation lowers peripheral vascular resistance and blood pressure, while reduced aldosterone decreases sodium and water retention. Because it acts downstream of angiotensin II rather than inhibiting its formation, it does not raise bradykinin levels, which accounts for the lower incidence of cough compared with ACE inhibitors. Reduced aldosterone activity decreases renal potassium excretion, which can raise serum potassium.1,2
Dosing & protocol.
Can be taken with or without food; food does not meaningfully affect bioavailability. Absolute bioavailability is low (about 15 percent) due to incomplete conversion of the prodrug, but absorption is consistent. May be taken at any consistent time of day.
Full safety detail.
Side effects
- Dizziness or lightheadedness
- Hypotension, particularly in volume-depleted patients
- Hyperkalemia (elevated serum potassium)
- Increased serum creatinine or impaired renal function
- Headache
- Fatigue
- Back pain
- Rarely angioedema
Contraindications
- Pregnancy (can cause fetal injury and death, especially in the second and third trimesters)4
- Hypersensitivity to candesartan or any component of the formulation1,2
- Concomitant use with aliskiren in patients with diabetes4
- Bilateral renal artery stenosis (use with caution; risk of renal failure)
- Severe hyperkalemia4
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Randomized controlled trials
2- 1Effects of candesartan in patients with chronic heart failure and reduced left-ventricular systolic function taking angiotensin-converting-enzyme inhibitors: the CHARM-Added trialMcMurray JJ, Ostergren J, Swedberg K, et al. · The Lancet · 2003
Adding candesartan to ACE inhibitor therapy in heart failure with reduced ejection fraction significantly reduced cardiovascular death and hospital admission for heart failure.
- 2Effects of candesartan in patients with chronic heart failure and reduced left-ventricular systolic function intolerant to angiotensin-converting-enzyme inhibitors: the CHARM-Alternative trialGranger CB, McMurray JJ, Yusuf S, et al. · The Lancet · 2003
Candesartan reduced cardiovascular mortality and heart failure hospitalization in ACE-inhibitor-intolerant patients with reduced ejection fraction.
Reference material
2- 3Candesartan cilexetil prescribing information / FDA label (Atacand)AstraZeneca / US FDA · US FDA Prescribing Information · 2018
Candesartan cilexetil is indicated for the treatment of hypertension and heart failure, providing sustained 24-hour blood pressure reduction with once-daily dosing.
- 4Candesartan cilexetil prescribing information: warnings and precautions on hyperkalemiaUS FDA · US FDA Prescribing Information · 2018
Concomitant use of potassium supplements, potassium-sparing diuretics, or potassium-containing salt substitutes with candesartan may increase serum potassium and lead to hyperkalemia.
Common questions.
Quick answers about Candesartan, drawn from the data on this page.
What is Candesartan?
Candesartan is an angiotensin II receptor blocker (ARB) used to treat high blood pressure and chronic heart failure with reduced ejection fraction. It is administered as the prodrug candesartan cilexetil, which is rapidly converted to active candesartan during absorption from the gastrointestinal tract. By blocking the AT1 receptor it lowers blood pressure and reduces cardiovascular strain with a once-daily dosing profile.
What is Candesartan used for?
Commonly cited benefits of Candesartan include: Lowers blood pressure in essential hypertension; Reduces cardiovascular morbidity and mortality in chronic heart failure with reduced ejection fraction; Reduces heart failure hospitalizations; Provides renal and cardiovascular protection as an alternative when ACE inhibitors are not tolerated. NutriStack rates the overall evidence as strong.
What is a typical dose of Candesartan?
A typical adult dose of Candesartan is Hypertension: usually 8 to 32 mg once daily (typical starting dose 16 mg). Heart failure: start 4 mg once daily and titrate by doubling at intervals of about 2 weeks as tolerated to a target of 32 mg once daily.. The commonly recommended form is Oral tablet (candesartan cilexetil), taken once daily. These are general ranges, not personalized advice; confirm the right dose with a clinician.
What are the side effects of Candesartan?
Reported side effects include dizziness or lightheadedness, hypotension, particularly in volume-depleted patients, hyperkalemia (elevated serum potassium), increased serum creatinine or impaired renal function, headache, fatigue. This is educational information; check with a healthcare professional before use.
How strong is the evidence for Candesartan?
NutriStack rates this as Strong, meaning multiple high-quality meta-analyses or systematic reviews converge on the same finding. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.
Use this with your stack
Candesartan in NutriStack.
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