Heart failure:
Note: When initiating therapy, verify the following: serum potassium <5 mEq/L and either serum creatinine ≤2.5 mg/dL in males and ≤2 mg/dL in females or eGFR >30 mL/minute/1.73 m2. If patient develops hyperkalemia or kidney function worsens, reduce the dose, change to every-other-day dosing, or discontinue therapy; assess for other causes of hyperkalemia before permanent discontinuation. If serum potassium cannot be maintained <5.5 mEq/L, discontinue therapy (Ref).
Heart failure with preserved ejection fraction (off-label use):
Note: Some experts recommend treatment with a sodium-glucose co-transporter 2 (SGLT2) inhibitor (eg, empagliflozin or dapagliflozin) prior to initiating eplerenone; however, eplerenone is still reasonable in patients who cannot take an SGLT2 inhibitor (Ref). Some experts are more conservative regarding serum potassium for patients with HFpEF. They recommend initiating therapy or up-titrating the dose only if serum potassium is ≤4.7 mEq/L and eGFR is ≥30 mL/minute/1.73 m2. They recommend dose reduction or discontinuation if serum potassium is >5 mEq/L (Ref).
Oral: Initial: 25 mg once daily; may double the dose after 4 weeks if serum potassium and kidney function are stable, to a maximum target dose of 50 mg once daily (Ref).
Heart failure with reduced ejection fraction (off-label use):
Note: Should be considered for use in patients with symptomatic (New York Heart Association class II to IV) heart failure with reduced ejection fraction (HFrEF) (≤40%) as part of an optimal medical regimen for HFrEF (Ref).
Oral: Initial: 25 mg once daily; may double the dose after 4 weeks if serum potassium and kidney function are stable, to a maximum target dose of 50 mg once daily (Ref).
Post myocardial infarction, complicated by reduced ejection fraction:
Note: Should be considered for use following acute myocardial infarction in patients with left ventricular ejection fraction ≤40% plus symptoms of heart failure or diabetes. Use in addition to other pharmacologic therapies (Ref).
Oral: Initial: 25 mg once daily; may double the dose after 4 weeks if serum potassium and kidney function are stable, up to a maximum target dose of 50 mg once daily.
Hypertension, chronic (alternative agent):
Note: Not recommended for initial management but may be considered as additional therapy for resistant hypertension in patients who do not respond adequately to combination therapy with preferred agents (Ref).
Oral: Initial: 50 mg once daily; evaluate response after ~2 to 4 weeks and titrate dose, as needed, to a maximum of 50 mg twice daily. Twice daily dosing is usually required for adequate BP lowering. Patients with severe asymptomatic hypertension and no signs of acute end organ damage should be evaluated for medication titration within 1 week (Ref).
Primary aldosteronism (alternative agent) (off-label use):
Oral: Initial: 25 mg twice daily; gradually titrate to the lowest effective dose, up to 300 mg/day. For patients undergoing surgical intervention, administer the last dose of eplerenone on the day of surgery, then discontinue eplerenone on postoperative day 1 (Ref).
Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.
The renal dosing recommendations are based upon the best available evidence and clinical expertise. Senior Editorial Team: Bruce Mueller, PharmD, FCCP, FASN, FNKF; Jason A. Roberts, PhD, BPharm (Hons), B App Sc, FSHP, FISAC; Michael Heung, MD, MS.
Note: Although eplerenone clearance is not significantly impacted by kidney impairment, the primary concern about use in this population is an increased risk of hyperkalemia (Ref). Eplerenone should be used with increasing caution as eGFR declines (Ref).
Altered kidney function: Oral:
Heart failure :
eGFR ≥50 mL/minute/1.73 m2: No dosage adjustment necessary (Ref).
eGFR 31 to 49 mL/minute/1.73 m2: Initial: 25 mg every other day; may increase to maximum target dose of 25 mg once daily after 4 weeks if serum potassium and kidney function are stable (Ref).
eGFR ≤30 mL/minute/1.73 m2: Use is contraindicated (Ref).
Hypertension:
eGFR ≥50 mL/minute/1.73 m2: No dosage adjustment necessary (Ref).
eGFR 31 to 49 mL/minute/1.73 m2: Although the manufacturer's labeling states use is contraindicated in patients with CrCl <50 mL/minute in the treatment of chronic hypertension, limited data suggest mineralocorticoid receptor antagonists (eg, eplerenone) may be used (sometimes in combination with a potassium-binding polymer) if the potential benefits outweigh the risks (Ref). If use deemed appropriate, initiate therapy with 50% of the usual recommended dose; may gradually titrate with caution and close monitoring of serum potassium and kidney function; use the lowest effective dose, not to exceed the usual indication specific dose (Ref).
eGFR ≤30 mL/minute/1.73 m2: Use is contraindicated (Ref).
Hemodialysis, intermittent (thrice weekly): Poorly dialyzable (10%) (Ref): Use not routinely recommended, but one pilot trial demonstrated tolerability of eplerenone in patients with end-stage kidney disease receiving dialysis (Ref). Only use if potassium is well-controlled, patient can be monitored closely for hyperkalemia, and potential benefits outweigh the risks (Ref). If use deemed appropriate, initiate therapy with 50% of the usual recommended dose (eg, 25 mg every other day for heart failure; 25 mg once daily for hypertension). May gradually titrate with extreme caution and close monitoring of serum potassium. A maximum dose of 25 mg once daily is recommended for the treatment of heart failure, and a maximum of 50 mg once daily is suggested for hypertension (Ref).
Peritoneal dialysis: Unlikely to be dialyzable (Ref): Use not routinely recommended. Only use if potassium is well-controlled, patient can be monitored closely for hyperkalemia, and potential benefits outweigh the risks (Ref). If use deemed appropriate, initiate therapy with 50% of the usual recommended dose (eg, 25 mg every other day for heart failure; 25 mg once daily for hypertension). May gradually titrate to lowest effective dose with extreme caution and close monitoring of serum potassium. A maximum dose of 25 mg once daily is recommended for the treatment of heart failure (Ref). A maximum dose of 50 mg once daily is suggested for hypertension, as one case report has described successful use of 50 mg/day to treat resistant hypertension in a patient with end-stage kidney disease receiving peritoneal dialysis (Ref).
CRRT: Use not routinely recommended. Only use if potential benefits outweigh the risks. If use deemed appropriate, initiate therapy with 50% of the usual dose (eg, 25 mg every other day for heart failure; 25 mg once daily for hypertension). May gradually titrate with caution and close monitoring of serum potassium; use the lowest effective dose, not to exceed the usual indication-specific dose (Ref).
PIRRT (eg, sustained, low-efficiency diafiltration): Use not routinely recommended. Only use if potential benefits outweigh the risks. If use deemed appropriate, initiate therapy with 50% of the usual dose (eg, 25 mg every other day for heart failure; 25 mg once daily for hypertension). May gradually titrate with caution and close monitoring of serum potassium; use the lowest effective dose, not to exceed the usual indication-specific dose (Ref).
There are no dosage adjustments provided in the manufacturer's labeling. Systemic exposure is increased in moderate hepatic impairment (Child-Pugh class B).
Refer to adult dosing.
Eplerenone can cause reversible hyperkalemia; however, if potassium is monitored periodically and with suspected changes in electrolytes (vomiting, diarrhea), the risk does not appear to translate into a higher risk of hospitalization or death (Ref).
Mechanism: Dose-related; related to the pharmacologic action. Competes with aldosterone for binding to the mineralocorticoid receptor, thereby inhibiting the exchange of sodium for potassium in the distal convoluted renal tubule and preventing potassium excretion (Ref).
Onset: Intermediate; usually occurs within 4 weeks of initiation or dose titration (Ref).
Risk factors:
• Doses >100 mg daily (Ref)
• Older patients (≥75 years of age) (Ref)
• Diabetes (Ref)
• Kidney impairment (Ref)
• Excessive potassium intake (eg, potassium supplements, potassium-containing salt substitutes)
• Concomitant use of certain medications (eg, angiotensin-converting enzyme inhibitors, angiotensin-receptor blockers, sacubitril/valsartan, nonsteroidal anti-inflammatory drugs, moderate CYP3A inhibitors)
• Baseline serum potassium >4.3 mEq/L (Ref)
• Prior use of antiarrhythmic agents (Ref)
• Proteinuria
The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified.
>10%: Endocrine & metabolic: Hyperkalemia (cardiac failure, post-myocardial infarction: 3%; >5.5 mEq/L: 16%; ≥6 mEq/L: 6%) (table 1)
Drug (Eplerenone) |
Placebo |
Indication |
Number of Patients (Eplerenone) |
Number of Patients (Placebo) |
Comments |
---|---|---|---|---|---|
16% |
11% |
Cardiac failure, post-myocardial infarction |
3251 |
3237 |
>5.5 mEq/L |
6% |
4% |
Cardiac failure, post-myocardial infarction |
3251 |
3237 |
≥6 mEq/L |
3% |
2% |
Cardiac failure, post-myocardial infarction |
3307 |
3301 |
N/A |
1% to 10%: Renal: Increased serum creatinine (cardiac failure, post-myocardial infarction: 2% to 7%)
Frequency not defined:
Cardiovascular: Acute myocardial infarction, angina pectoris
Endocrine & metabolic: Gynecomastia, increased gamma-glutamyl transferase
Genitourinary: Abnormal vaginal hemorrhage
Nervous system: Dizziness, headache
Renal: Renal insufficiency
Postmarketing:
Dermatologic: Skin rash
Hypersensitivity: Angioedema
Serum potassium >5.5 mEq/L at initiation; CrCl ≤30 mL/minute; concomitant use of strong CYP3A4 inhibitors (eg, ketoconazole, itraconazole, nefazodone, troleandomycin, clarithromycin, ritonavir, nelfinavir).
Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.
The following additional contraindications apply to patients with hypertension: Type 2 diabetes mellitus with microalbuminuria; concomitant use with potassium supplements or potassium-sparing diuretics (eg, amiloride, spironolactone, triamterene).
Although the manufacturer’s labeling contraindicates use in males with serum creatinine >2 mg/dL, females with serum creatinine >1.8 mg/dL, or any patient with CrCl <50 mL/minute, limited data suggest mineralocorticoid receptor antagonists (eg, eplerenone) can be cautiously used (sometimes in combination with a potassium-binding polymer) in select patients with an eGFR between 30 and 50 mL/minute/1.73m2 (Ref).
Based on the Endocrine Society (ES) clinical practice guidelines on the diagnosis and treatment of primary adrenal insufficiency, use of eplerenone in patients with Addison disease is contraindicated (ES [Bornstein 2016]).
Canadian labeling: Additional contraindications (not in US labeling): Hypersensitivity to eplerenone or any component of the formulation; serum potassium >5 mEq/L at initiation; severe hepatic impairment (Child-Pugh class C); clinically significant hyperkalemia; concomitant use with potassium supplements or potassium-sparing diuretics
The following additional contraindications apply to patients with hypertension: Serum creatinine >1.5 mg/dL [132 micromole/L] in males or >1.3 mg/dL [115 micromole/L] in females
Disease-related concerns:
• Heart failure: When evaluating a heart failure patient for eplerenone treatment, eGFR should be >30 mL/minute/1.73 m2 or creatinine should be ≤2.5 mg/dL (males) or ≤2 mg/dL (females) with no recent worsening and potassium should be <5 mEq/L with no history of severe hyperkalemia. Discontinue therapy if serum potassium cannot be maintained <5.5 mEq/L or if kidney function worsens. Consider the entire medical regimen and other potential causes of hyperkalemia (AHA/ACC/HFSA [Heidenreich 2022]).
• Hepatic impairment: Use with caution in patients with moderate to severe hepatic impairment.
• Kidney impairment: Use in patients with kidney impairment is dependent on the degree of impairment and indication for use; dosage adjustment may be necessary.
Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Tablet, Oral:
Inspra: 25 mg, 50 mg
Generic: 25 mg, 50 mg
Yes
Tablets (Eplerenone Oral)
25 mg (per each): $4.17 - $4.34
50 mg (per each): $4.17 - $4.34
Tablets (Inspra Oral)
25 mg (per each): $17.74
50 mg (per each): $17.74
Disclaimer: A representative AWP (Average Wholesale Price) price or price range is provided as reference price only. A range is provided when more than one manufacturer's AWP price is available and uses the low and high price reported by the manufacturers to determine the range. The pricing data should be used for benchmarking purposes only, and as such should not be used alone to set or adjudicate any prices for reimbursement or purchasing functions or considered to be an exact price for a single product and/or manufacturer. Medi-Span expressly disclaims all warranties of any kind or nature, whether express or implied, and assumes no liability with respect to accuracy of price or price range data published in its solutions. In no event shall Medi-Span be liable for special, indirect, incidental, or consequential damages arising from use of price or price range data. Pricing data is updated monthly.
Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Tablet, Oral:
Inspra: 25 mg, 50 mg [contains polysorbate 80]
Generic: 25 mg, 50 mg
Oral: Administer with or without food.
Hypertension, chronic: Management of hypertension. Note: Not recommended for the initial treatment of hypertension (ACC/AHA [Whelton 2018]).
Post myocardial infarction, complicated by heart failure with reduced ejection fraction: To improve survival of stable patients with symptomatic heart failure (left ventricular ejection fraction ≤40%) following acute myocardial infarction.
Heart failure with preserved ejection fraction; Heart failure with reduced ejection fraction; Primary aldosteronism
Beers Criteria: Diuretics are identified in the Beers Criteria as potentially inappropriate medications to be used with caution in patients 65 years and older due to the potential to cause or exacerbate syndrome of inappropriate antidiuretic hormone secretion (SIADH) or hyponatremia; monitor sodium concentration closely when initiating or adjusting the dose in older adults (Beers Criteria [AGS 2023]).
Inspra may be confused with Spiriva
Substrate of CYP3A4 (Major with inhibitors), CYP3A4 (Minor with inducers); Note: Assignment of Major/Minor substrate status based on clinically relevant drug interaction potential;
Note: Interacting drugs may not be individually listed below if they are part of a group interaction (eg, individual drugs within “CYP3A4 Inducers [Strong]” are NOT listed). For a complete list of drug interactions by individual drug name and detailed management recommendations, use the drug interactions program by clicking on the “Launch drug interactions program” link above.
Alfuzosin: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Aliskiren: Potassium-Sparing Diuretics may increase hyperkalemic effects of Aliskiren. Risk C: Monitor
Amifostine: Blood Pressure Lowering Agents may increase hypotensive effects of Amifostine. Management: When used at chemotherapy doses, hold blood pressure lowering medications for 24 hours before amifostine administration. If blood pressure lowering therapy cannot be held, do not administer amifostine. Use caution with radiotherapy doses of amifostine. Risk D: Consider Therapy Modification
Ammonium Chloride: Potassium-Sparing Diuretics may increase adverse/toxic effects of Ammonium Chloride. Specifically the risk of systemic acidosis. Risk C: Monitor
Amphetamines: May decrease antihypertensive effects of Antihypertensive Agents. Risk C: Monitor
Angiotensin II Receptor Blockers: Potassium-Sparing Diuretics may increase hyperkalemic effects of Angiotensin II Receptor Blockers. Risk C: Monitor
Angiotensin-Converting Enzyme Inhibitors: Potassium-Sparing Diuretics may increase hyperkalemic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor
Antipsychotic Agents (Second Generation [Atypical]): Blood Pressure Lowering Agents may increase hypotensive effects of Antipsychotic Agents (Second Generation [Atypical]). Risk C: Monitor
Arginine: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Barbiturates: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Benperidol: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Brigatinib: May decrease antihypertensive effects of Antihypertensive Agents. Brigatinib may increase bradycardic effects of Antihypertensive Agents. Risk C: Monitor
Brimonidine (Topical): May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Bromperidol: May decrease hypotensive effects of Blood Pressure Lowering Agents. Blood Pressure Lowering Agents may increase hypotensive effects of Bromperidol. Risk X: Avoid
Clofazimine: May increase serum concentration of CYP3A4 Substrates (High risk with Inhibitors). Risk C: Monitor
CycloSPORINE (Systemic): Potassium-Sparing Diuretics may increase hyperkalemic effects of CycloSPORINE (Systemic). Risk X: Avoid
CYP3A4 Inducers (Strong): May decrease serum concentration of Eplerenone. Risk C: Monitor
CYP3A4 Inhibitors (Moderate): May increase serum concentration of Eplerenone. Management: If coadministered with moderate CYP3A4 inhibitors, the max dose of eplerenone is 25 mg daily if used for heart failure; if used for hypertension initiate eplerenone 25 mg daily, titrate to max 25 mg twice daily. Risk D: Consider Therapy Modification
CYP3A4 Inhibitors (Strong): May increase serum concentration of Eplerenone. Risk X: Avoid
Desmopressin: Hyponatremia-Associated Agents may increase hyponatremic effects of Desmopressin. Risk C: Monitor
Dexmethylphenidate: May decrease therapeutic effects of Antihypertensive Agents. Risk C: Monitor
Diacerein: May increase therapeutic effects of Diuretics. Specifically, the risk for dehydration or hypokalemia may be increased. Risk C: Monitor
Diazoxide: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Digitoxin: Potassium-Sparing Diuretics may increase adverse/toxic effects of Digitoxin. Potassium-Sparing Diuretics may decrease therapeutic effects of Digitoxin. Risk C: Monitor
Drospirenone-Containing Products: May increase hyperkalemic effects of Potassium-Sparing Diuretics. Risk C: Monitor
DULoxetine: Blood Pressure Lowering Agents may increase hypotensive effects of DULoxetine. Risk C: Monitor
Finerenone: Potassium-Sparing Diuretics may increase hyperkalemic effects of Finerenone. Risk C: Monitor
Fludrocortisone: May decrease therapeutic effects of Mineralocorticoid (Aldosterone) Receptor Antagonists. Mineralocorticoid (Aldosterone) Receptor Antagonists may decrease therapeutic effects of Fludrocortisone. Risk C: Monitor
Flunarizine: May increase therapeutic effects of Antihypertensive Agents. Risk C: Monitor
Fusidic Acid (Systemic): May increase serum concentration of CYP3A4 Substrates (High risk with Inhibitors). Management: Consider avoiding this combination if possible. If required, monitor patients closely for increased adverse effects of the CYP3A4 substrate. Risk D: Consider Therapy Modification
Grapefruit Juice: May increase serum concentration of Eplerenone. Risk C: Monitor
Heparin: May increase hyperkalemic effects of Potassium-Sparing Diuretics. Risk C: Monitor
Heparins (Low Molecular Weight): May increase hyperkalemic effects of Potassium-Sparing Diuretics. Risk C: Monitor
Herbal Products with Blood Pressure Increasing Effects: May decrease antihypertensive effects of Antihypertensive Agents. Risk C: Monitor
Herbal Products with Blood Pressure Lowering Effects: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Hypotension-Associated Agents: Blood Pressure Lowering Agents may increase hypotensive effects of Hypotension-Associated Agents. Risk C: Monitor
Iloperidone: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Indoramin: May increase hypotensive effects of Antihypertensive Agents. Risk C: Monitor
Isocarboxazid: May increase hypotensive effects of Diuretics. Risk X: Avoid
Itraconazole: May increase serum concentration of Eplerenone. Risk X: Avoid
Levodopa-Foslevodopa: Blood Pressure Lowering Agents may increase hypotensive effects of Levodopa-Foslevodopa. Risk C: Monitor
Lithium: Potassium-Sparing Diuretics may decrease serum concentration of Lithium. Potassium-Sparing Diuretics may increase serum concentration of Lithium. Risk C: Monitor
Loop Diuretics: May increase hypotensive effects of Antihypertensive Agents. Risk C: Monitor
Lormetazepam: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Metergoline: May decrease antihypertensive effects of Blood Pressure Lowering Agents. Blood Pressure Lowering Agents may increase orthostatic hypotensive effects of Metergoline. Risk C: Monitor
Methylphenidate: May decrease antihypertensive effects of Antihypertensive Agents. Risk C: Monitor
Molsidomine: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Naftopidil: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Nicergoline: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Nicorandil: May increase hyperkalemic effects of Potassium-Sparing Diuretics. Risk C: Monitor
Nicorandil: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Nitroprusside: Blood Pressure Lowering Agents may increase hypotensive effects of Nitroprusside. Risk C: Monitor
Nonsteroidal Anti-Inflammatory Agents: May decrease antihypertensive effects of Eplerenone. Nonsteroidal Anti-Inflammatory Agents may increase hyperkalemic effects of Eplerenone. Risk C: Monitor
Obinutuzumab: May increase hypotensive effects of Blood Pressure Lowering Agents. Management: Consider temporarily withholding blood pressure lowering medications beginning 12 hours prior to obinutuzumab infusion and continuing until 1 hour after the end of the infusion. Risk D: Consider Therapy Modification
Opioid Agonists: May increase adverse/toxic effects of Diuretics. Opioid Agonists may decrease therapeutic effects of Diuretics. Risk C: Monitor
Pentoxifylline: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Perazine: May increase hypotensive effects of Antihypertensive Agents. Risk C: Monitor
Pholcodine: Blood Pressure Lowering Agents may increase hypotensive effects of Pholcodine. Risk C: Monitor
Phosphodiesterase 5 Inhibitors: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Piperacillin: May increase hypokalemic effects of Diuretics. Risk C: Monitor
Polyethylene Glycol-Electrolyte Solution: Diuretics may increase nephrotoxic effects of Polyethylene Glycol-Electrolyte Solution. Risk C: Monitor
Potassium Salts: Eplerenone may increase hyperkalemic effects of Potassium Salts. Management: This combination is contraindicated in patients receiving eplerenone for treatment of hypertension. Potassium supplements may be needed to treat/prevent hypokalemia in select patients with heart failure receiving eplerenone and high dose loop diuretics. Risk D: Consider Therapy Modification
Potassium-Sparing Diuretics: May increase hyperkalemic effects of Potassium-Sparing Diuretics. Risk X: Avoid
Prazosin: Antihypertensive Agents may increase hypotensive effects of Prazosin. Risk C: Monitor
Prostacyclin Analogues: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Quinagolide: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Silodosin: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor
Sodium Phosphates: Diuretics may increase nephrotoxic effects of Sodium Phosphates. Specifically, the risk of acute phosphate nephropathy may be enhanced. Risk C: Monitor
Tacrolimus (Systemic): Potassium-Sparing Diuretics may increase hyperkalemic effects of Tacrolimus (Systemic). Risk C: Monitor
Terazosin: Antihypertensive Agents may increase hypotensive effects of Terazosin. Risk C: Monitor
Tolvaptan: May increase hyperkalemic effects of Potassium-Sparing Diuretics. Risk C: Monitor
Trimethoprim: May increase hyperkalemic effects of Potassium-Sparing Diuretics. Risk C: Monitor
Urapidil: Antihypertensive Agents may increase hypotensive effects of Urapidil. Risk C: Monitor
Grapefruit juice increases eplerenone AUC ~25%. Management: Dosage adjustments of eplerenone may be needed.
Eplerenone may be preferred for the treatment of primary aldosteronism (PA) in patients who are planning to become pregnant and require treatment with a mineralocorticoid receptor antagonist (Forestiero 2022; Riester 2015). Use of eplerenone may be considered for patients experiencing menstrual irregularities or erectile dysfunction with other mineralocorticoid receptor antagonists during treatment for PA or resistant hypertension (ACC/AHA [Whelton 2018]; ES [Funder 2016]; Kallistratos 2018).
Medications considered acceptable for the treatment of chronic hypertension during pregnancy may generally be continued in patients trying to conceive. The use of mineralocorticoid receptor antagonists is not recommended for the treatment of chronic hypertension in pregnant patients (ACOG 2019). Consider transitioning to an agent preferred for use during pregnancy in patients planning to become pregnant (ACC/AHA [Whelton 2018]; ACOG 2019; NICE 2019).
Patients with heart failure who are planning to become pregnant should discontinue mineralocorticoid receptor antagonists prior to conception (AHA/ACC/HFSA [Heidenreich 2022]).
Eplerenone crosses the placenta (Saito 2021).
Data related to eplerenone use in pregnancy are limited (Cabassi 2012; Gehlert 2021; Gunganah 2015; Hutter 2006; Morton 2011; Morton 2017).
Chronic maternal hypertension is associated with adverse events in the fetus/infant. Chronic maternal hypertension may increase the risk of birth defects, low birth weight, premature delivery, stillbirth, and neonatal death. Actual fetal/neonatal risks may be related to the duration and severity of maternal hypertension. Untreated chronic hypertension may also increase the risks of adverse maternal outcomes, including gestational diabetes, preeclampsia, delivery complications, stroke, and myocardial infarction (ACOG 2019). Patients with preexisting hypertension may continue their medication during pregnancy unless contraindications exist (ESC [Regitz-Zagrosek 2018]). When treatment of chronic hypertension during pregnancy is indicated, the use of mineralocorticoid receptor antagonists is generally not recommended (ACOG 2019).
Data specific to the treatment of primary aldosteronism (PA) in pregnancy are limited. Patients with PA should stop eplerenone before conception if possible. If treatment is stopped and PA is not controlled, eplerenone can be restarted in the second or third trimester (ES [Funder 2016]; Forestiero 2022; Riester 2015; Sanga 2022).
Heart failure in pregnancy is associated with adverse maternal and fetal outcomes, including premature birth, infants born small for gestational age, and increased risk of maternal and fetal death (Bright 2021). When treatment of heart failure during pregnancy is needed, the use of an agent other than a mineralocorticoid receptor antagonist is recommended (AHA/ACC/HFSA [Heidenreich 2022]; ESC [Regitz-Zagrosek 2018]).
Case reports describe the use of potassium sparing diuretics such as eplerenone for the adjunctive treatment of Gitleman syndrome during pregnancy (Calò 2012; Moustakakis 2012; Shahzad 2019).
Eplerenone is present in breast milk.
Data related to the presence of eplerenone in breast milk are available from a case report. Eplerenone 50 mg once daily was initiated during pregnancy and continued postpartum. Multiple breast milk samples were obtained on postpartum days 7 and 35. The highest breast milk concentration observed was 161.2 ng/mL, obtained 4 hours after the dose on postpartum day 35. Using a milk concentration of 161.2 ng/mL, authors of the study calculated the estimated daily infant dose via breast milk to be 0.024 mg/kg/day, providing a relative infant dose of 3% based on the weight adjusted maternal dose. The infant was partially breastfed (over 50%); no adverse reactions were reported, and normal development was observed at 1 and 3 months (Saito 2021).
Do not use salt substitutes containing potassium.
BP; serum potassium (prior to therapy, within the first week, 1 month after start of treatment or dose adjustment, then periodically as clinically indicated); serum potassium and serum creatinine within 3 to 7 days after initiating concurrent therapy with a moderate CYP3A inhibitor, angiotensin-converting enzyme (ACE) inhibitor, angiotensin-II receptor blocker (ARB), or nonsteroidal anti-inflammatory drug.
Heart failure: Serum potassium and kidney function should be checked in 3 days after initiation, at 1 week after initiation, at least monthly for the first 3 months of therapy, and every 3 months thereafter. If adding or increasing the dose of concomitant ACE inhibitors or ARBs, a new cycle of monitoring should be done. If serum potassium increases to >5.5 mEq/L or kidney function worsens, hold doses until potassium is <5 mEq/L and consider restarting with a reduced dose after confirming resolution of hyperkalemia/kidney insufficiency for at least 72 hours. If serum potassium cannot be maintained <5.5 mEq/L, discontinue therapy (ACC [Maddox 2021]; AHA/ACC/HFSA [Heidenreich 2022]).
Aldosterone, a mineralocorticoid, increases blood pressure primarily by inducing sodium and water retention. Overexpression of aldosterone is thought to contribute to myocardial fibrosis (especially following myocardial infarction) and vascular fibrosis. Mineralocorticoid receptors are located in the kidney, heart, blood vessels, and brain. Eplerenone selectively blocks mineralocorticoid receptors reducing blood pressure in a dose-dependent manner and appears to prevent myocardial and vascular fibrosis.
Distribution: Vd: 42 to 90 L
Protein binding: ~50%; primarily to alpha1-acid glycoproteins
Metabolism: Primarily hepatic via CYP3A4; metabolites inactive
Bioavailability: 69%
Half-life elimination: ~3 to 6 hours
Time to peak, plasma: ~1.5 to 2 hours; may take up to 4 weeks for full antihypertensive effect
Excretion: Urine (~67%); feces (~32%); <5% as unchanged drug in urine and feces
Altered kidney function: AUC and Cmax increased 38% and 24%, respectively, in severe kidney impairment and decreased by 26% and 3%, respectively, in hemodialysis.
Hepatic function impairment: Cmax and AUC increased 3.6% and 42%, respectively, in moderate hepatic impairment.
Older adult: Cmax and AUC increased 22% and 45%, respectively.
Race/ethnicity: Cmax and AUC decreased 19% and 25%, respectively, in black patients.