Head-to-head clinical analysis & difference comparison: details on mechanism of action, dosing, half-life, interactions, and maternal-fetal safety.
EDARBI vs EDARBYCLOR
Clinician-reviewed, head-to-head comparison of mechanism, dosing, pharmacokinetics, and safety profiles.
Last clinically reviewed: July 2026 · OpiCalc Medical Review Team
Angiotensin II receptor blocker (ARB) that selectively blocks the binding of angiotensin II to AT1 receptors, leading to vasodilation, reduced aldosterone secretion, and decreased blood pressure.
EDARBYCLOR is a fixed-dose combination of azilsartan medoxomil, an angiotensin II receptor blocker (ARB), and chlorthalidone, a thiazide-like diuretic. Azilsartan selectively blocks AT1 receptors, reducing angiotensin II-mediated vasoconstriction, aldosterone secretion, and renal sodium reabsorption. Chlorthalidone inhibits sodium-chloride cotransport in the distal convoluted tubule, increasing excretion of sodium, chloride, and water, thereby reducing plasma volume.
Treatment of hypertension,Off-label: Diabetic nephropathy, heart failure
Treatment of hypertension to lower blood pressure; lowering blood pressure reduces the risk of fatal and nonfatal cardiovascular events, primarily strokes and myocardial infarctions
EDARBI (azilsartan medoxomil) is administered orally. The recommended starting dose is 40 mg once daily. For patients requiring further blood pressure reduction, the dose may be increased to 80 mg once daily. Maximal antihypertensive effect is attained within 2 weeks.
One tablet (azilsartan medoxomil 40 mg / chlorthalidone 12.5 mg or 40 mg / 25 mg) orally once daily.
Approximately 20-22 hours in normal subjects; allows once-daily dosing. Half-life increases in moderate to severe hepatic impairment.
Terminal elimination half-life is approximately 11-12 hours for azilsartan medoxomil; clinical consequence: supports once-daily dosing for 24-hour blood pressure control
Primarily metabolized by CYP2C9 and CYP3A4; undergoes dehydrogenation and decarboxylation.
Azilsartan medoxomil is hydrolyzed to the active metabolite azilsartan; azilsartan is metabolized primarily by CYP2C9. Chlorthalidone is minimally metabolized, with most of the dose excreted unchanged in urine.
Approximately 60% of dose is excreted in feces (primarily as unchanged drug) and 33% in urine (as metabolites, predominantly glucuronide conjugates).
Renal (approximately 60% as unchanged drug and metabolites), biliary/fecal (approximately 40%)
High (>99% bound to serum proteins, mainly albumin).
Azilsartan: >99% bound to serum albumin; chlorthalidone: approximately 75% bound to albumin and lipoproteins
Approximately 0.9 L/kg (total Vdss of about 86 L), indicating extensive distribution into tissues.
Azilsartan: approximately 16 L (0.2 L/kg) indicating limited extravascular distribution; chlorthalidone: approximately 3-4 L/kg (extensive tissue binding, particularly to erythrocytes)
Absolute bioavailability is about 15% due to extensive first-pass metabolism (CYP2C9, UGT1A3).
Azilsartan medoxomil: absolute bioavailability approximately 60% (oral); chlorthalidone: approximately 65% (oral)
No dose adjustment is required for patients with mild to moderate renal impairment (e GFR ≥30 m L/min/1.73 m²). For patients with severe renal impairment (e GFR <30 m L/min/1.73 m²) or end-stage renal disease (ESRD), caution is advised; no specific dosing recommendations are available due to limited data. Avoid use in patients undergoing dialysis.
e GFR <30 m L/min/1.73m2: not recommended. No adjustment required for e GFR ≥30 m L/min/1.73m2.
No dose adjustment is needed for mild hepatic impairment (Child-Pugh class A). For moderate hepatic impairment (Child-Pugh class B), the recommended starting dose is 40 mg once daily; maximum dose is 40 mg once daily. EDARBI should not be used in patients with severe hepatic impairment (Child-Pugh class C).
Child-Pugh Class A (mild): no adjustment. Child-Pugh Class B (moderate): contraindicated. Child-Pugh Class C (severe): contraindicated.
Safety and efficacy in pediatric patients (<18 years) have not been established. Therefore, no dosing recommendation is provided.
Not established; safety and efficacy in pediatric patients have not been studied.
No dose adjustment is required for elderly patients (≥65 years). However, as with all patients, initiate at 40 mg once daily; consider cautious titration due to potential greater sensitivity and increased risk of hypotension.
Initiate with the lowest available dose (40 mg/12.5 mg) and titrate cautiously due to increased risk of hypotension and electrolyte disturbances.
No FDA boxed warnings.
None
Fetal toxicity: Avoid in pregnancy; discontinue if pregnancy occurs,Hypotension in volume-depleted patients,Renal function impairment: Monitor serum creatinine and potassium,Hyperkalemia: Risk in patients with renal impairment or on potassium-sparing diuretics,Avoid use in patients with bilateral renal artery stenosis
Fetal toxicity: Drugs acting directly on the renin-angiotensin system can cause oligohydramnios, fetal renal dysfunction, and neonatal hypotension, hyperkalemia, and skull hypoplasia. Discontinue Edarbyclor as soon as possible when pregnancy is detected.,Hypotension: Correct volume- or salt-depleted patients prior to initiation; monitor for symptomatic hypotension.,Electrolyte disturbances: Chlorthalidone may cause hypokalemia, hyponatremia, and hypomagnesemia. Monitor electrolytes periodically.,Renal function deterioration: Monitor renal function in patients with renal artery stenosis, severe heart failure, or volume depletion.,Hyperkalemia: Risk increased with renal impairment, diabetes, or concomitant use of potassium-sparing diuretics, potassium supplements, or other drugs that increase potassium.,Acute angle-closure glaucoma: Chlorthalidone, as a sulfonamide derivative, can cause idiosyncratic reaction leading to acute transient myopia and acute angle-closure glaucoma.,Exacerbation of systemic lupus erythematosus: Chlorthalidone may exacerbate or activate SLE.,Metabolic: Chlorthalidone may increase serum glucose, uric acid (precipitating gout), and decrease urinary calcium excretion.,Sulfonamide allergy: Chlorthalidone is a sulfonamide derivative; caution in patients with sulfonamide allergy.
Concomitant use with aliskiren in patients with diabetes,Hypersensitivity to edarbi or any component,Pregnancy
Anuria,Hypersensitivity to azilsartan medoxomil, chlorthalidone, or any component of the formulation,Concomitant use with aliskiren in patients with diabetes mellitus
No significant food interactions. May be taken with or without food. Avoid excessive intake of potassium-rich foods (e.g., bananas, oranges, potatoes, tomatoes) and salt substitutes containing potassium, especially in patients with renal impairment or those on concomitant RAAS inhibitors or potassium-sparing diuretics.
Avoid high-potassium foods (e.g., bananas, oranges, potatoes, tomatoes, salt substitutes) in excess due to risk of hyperkalemia. Avoid excessive salt intake. Grapefruit juice may alter drug metabolism; limit or avoid consumption. Alcohol may potentiate hypotensive effects.
Drugs acting directly on the renin-angiotensin system (RAS) can cause fetal and neonatal morbidity and death when used in pregnancy. First-trimester exposure: Potential for fetal renal damage, oligohydramnios, and skull ossification defects. Second and third trimester exposure: Increased risk for oligohydramnios, fetal renal dysfunction, skull hypoplasia, hypotension, and anuria. Use is contraindicated in pregnancy, especially in second and third trimesters.
First trimester: Drugs acting directly on the renin-angiotensin system (RAS) can cause fetal renal dysplasia, oligohydramnios, and skull ossification defects when used in the second and third trimesters. There is no known risk of major malformations with first trimester exposure, but data are limited. Second and third trimesters: Use is contraindicated due to fetal renal dysfunction, oligohydramnios, pulmonary hypoplasia, limb contractures, and neonatal anuria, hypotension, and death. Azilsartan medoxomil (ARB) and chlorthalidone (thiazide diuretic) both affect RAS and fetal hemodynamics.
No data on azilsartan medoxomil (EDARBI) excretion in human milk; effects on the breastfed infant and milk production are unknown. Due to the potential for adverse effects in nursing infants, a decision should be made whether to discontinue nursing or discontinue the drug, taking into account the importance of the drug to the mother. M/P ratio unknown.
No data on azilsartan medoxomil or chlorthalidone presence in human milk, effects on the breastfed infant, or milk production. Chlorthalidone is present in breast milk at low levels; M/P ratio unknown. Due to potential for adverse effects in the nursing infant (e.g., hypotension, renal impairment), alternative agents are recommended.
EDARBI is not recommended during pregnancy; if pregnancy is detected, discontinue as soon as possible. No specific dose adjustments have been established for use in pregnancy; pharmacokinetic changes in pregnancy may alter drug exposure, but no data are available to guide dosing.
EDARBYCLOR is not recommended in pregnancy, especially during second and third trimesters; if exposure occurs, discontinue as soon as possible. No specific dose adjustment studied; however, pregnancy can increase volume of distribution and clearance of some antihypertensives, but no data for this combination. Use is contraindicated after first trimester.
Edarbi (azilsartan medoxomil) is an angiotensin II receptor blocker (ARB) with high receptor affinity and a long half-life (~11 hours), allowing once-daily dosing. It is a prodrug that is rapidly hydrolyzed to the active moiety azilsartan. Onset of action within 2 weeks; maximum effect may take 4-6 weeks. Monitor renal function and serum potassium, especially in patients with renal impairment, diabetes, or those taking NSAIDs or potassium-sparing diuretics. Avoid use in pregnancy (category D). Dose adjustment recommended for patients with hepatic impairment (Child-Pugh class B).
EDARBYCLOR is a fixed-dose combination of azilsartan medoxomil (an ARB) and chlorthalidone (a thiazide-like diuretic). Monitor renal function and electrolytes regularly due to risk of hypotension, hyperkalemia, and hyponatremia. Avoid use in patients with anuria or severe renal impairment (e GFR <30 m L/min). Chlorthalidone may exacerbate gout and hyperuricemia. Use caution in patients with hepatic impairment or diabetes.
Take exactly as prescribed, usually once daily, with or without food.,Do not take if pregnant or planning to become pregnant; use effective contraception.,Avoid salt substitutes containing potassium unless approved by your doctor.,Report symptoms such as dizziness, fainting, rapid heartbeat, or signs of kidney problems (e.g., swelling, decreased urination).,If you miss a dose, take it as soon as you remember, but skip if it is almost time for the next dose. Do not double the dose.,Avoid nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or naproxen without medical advice.
Take this medication exactly as prescribed, usually once daily.,Avoid salt substitutes containing potassium unless approved by your doctor.,Drink plenty of fluids unless otherwise directed by your healthcare provider.,Report symptoms of low blood pressure (dizziness, fainting), electrolyte imbalance (muscle cramps, weakness), or kidney problems (decreased urination).,This drug may cause dizziness; avoid driving or operating machinery until you know how it affects you.,Tell your doctor if you are pregnant or planning to become pregnant; this drug can cause fetal harm.,Limit alcohol intake as it may worsen side effects.,Do not stop taking this medication abruptly without consulting your doctor.
No interactions on record
No interactions on record
Explore head-to-head clinical comparisons of other medications in the same therapeutic classes.
Common clinical questions about EDARBI vs EDARBYCLOR, answered by our medical review team.
EDARBI is a Angiotensin II Receptor Blocker that works by Angiotensin II receptor blocker (ARB) that selectively blocks the binding of angiotensin II to AT1 receptors, leading to vasodilation, reduced aldosterone secretion, and decreased blood pressure.. EDARBYCLOR is a Angiotensin II Receptor Blocker/Thiazide Diuretic Combination that works by EDARBYCLOR is a fixed-dose combination of azilsartan medoxomil, an angiotensin II receptor blocker (ARB), and chlorthalidone, a thiazide-like diuretic. Azilsartan selectively blocks AT1 receptors, reducing angiotensin II-mediated vasoconstriction, aldosterone secretion, and renal sodium reabsorption. Chlorthalidone inhibits sodium-chloride cotransport in the distal convoluted tubule, increasing excretion of sodium, chloride, and water, thereby reducing plasma volume.. They differ in pharmacokinetic profiles, FDA-approved indications, and side effect profiles.
Potency comparisons between EDARBI and EDARBYCLOR depend on the specific clinical indication. These are agents from distinct pharmacological classes and are not directly interchangeable by dose. A physician or clinical pharmacist should guide any therapeutic switching decisions.
The standard adult dose of EDARBI is: EDARBI (azilsartan medoxomil) is administered orally. The recommended starting dose is 40 mg once daily. For patients requiring further blood pressure reduction, the dose may be increased to 80 mg once daily. Maximal antihypertensive effect is attained within 2 weeks.. The standard adult dose of EDARBYCLOR is: One tablet (azilsartan medoxomil 40 mg / chlorthalidone 12.5 mg or 40 mg / 25 mg) orally once daily.. Dosing should always be individualized based on indication, renal and hepatic function, age, and other patient factors.
No direct drug-drug interaction has been formally documented between EDARBI and EDARBYCLOR in current clinical databases. However, individual patient risk factors including other medications, organ function, and comorbidities should always be evaluated by a qualified healthcare provider.
The maternal-fetal safety profiles differ. EDARBI is classified as Category C. Drugs acting directly on the renin-angiotensin system (RAS) can cause fetal and neonatal morbidity and death when used in pregnancy. First-trimester exposure: Potential for fetal r. EDARBYCLOR is classified as Category C. First trimester: Drugs acting directly on the renin-angiotensin system (RAS) can cause fetal renal dysplasia, oligohydramnios, and skull ossification defects when used in the secon. Always consult a maternal-fetal medicine specialist before taking either drug during pregnancy or lactation.