Eplerenone: The Potassium-Sparing Diuretic for Heart Failure

At a Glance

What is Eplerenone?

Eplerenone is a potassium-sparing diuretic used to treat heart failure in selected patients and hypertension. It helps the body remove excess fluid while retaining potassium. Because it retains potassium, blood potassium can rise, so regular blood tests are an important part of treatment.

How Eplerenone Works

Eplerenone blocks aldosterone, a hormone that makes the body hold on to sodium and water and contributes to high blood pressure. By blocking aldosterone’s action on its receptor, eplerenone:

• reduces sodium and water retention,
• reduces aldosterone-related effects on the heart and blood vessels,
• lowers blood pressure, and
• improves outcomes in appropriate heart failure patients.

Eplerenone Uses

• Eplerenone for heart failure: Used in stable adults with symptomatic heart failure with reduced ejection fraction (a weakened heart pump) after a heart attack. It is not meant for every type of heart failure.
• Eplerenone for hypertension: Helps control blood pressure. It can be used alone or with other blood pressure medicines.

Eplerenone Dosage

Your doctor decides the dose based on your condition, potassium level and kidney function. Do not change your dose on your own.

• Heart failure after a heart attack: Treatment usually starts at 25 mg once daily and is increased to 50 mg once daily, preferably within 4 weeks if tolerated.
• Hypertension: Treatment usually starts at 50 mg once daily. If blood pressure stays high, the doctor may increase it to 50 mg twice daily. Higher doses do not lower blood pressure further and raise the risk of hyperkalemia.
• Potassium-based adjustment: The dose may need to be reduced, interrupted or adjusted according to serum potassium levels and the indication.

How to Take Eplerenone

Eplerenone can be taken with or without food. Take it as prescribed and do not use potassium-containing salt substitutes.

Eplerenone Side Effects

• Common: Dizziness, fatigue, diarrhea, cough.
• Important: hyperkalemia (high potassium). This is the main safety concern. Seek medical advice if you notice muscle weakness, an irregular heartbeat or unusual tiredness.
• Kidney function changes: Eplerenone can affect kidney function, including a rise in creatinine, which is why kidney function is monitored.

Eplerenone Precautions

Eplerenone and Potassium

• Potassium is checked before treatment and during treatment.
• Potassium supplements should generally be avoided unless your doctor specifically directs otherwise.
• Potassium-containing salt substitutes can increase potassium levels.
• ACE inhibitors, ARBs and NSAIDs can increase the risk of hyperkalemia. The risk is also higher in people with kidney impairment, diabetes or protein in the urine.

Eplerenone and Kidney Function

Declining kidney function increases the risk of hyperkalemia. Specific kidney limits apply depending on why eplerenone is prescribed, so your doctor will check your kidney function before and during treatment.

When Eplerenone Must Not Be Used

For all patients (including heart failure):

• Serum potassium above 5.5 mEq/L at the start of treatment
• Creatinine clearance of 30 mL/min or less
• Use with strong CYP3A inhibitors

Additional restrictions when used for hypertension:

• Type 2 diabetes with microalbuminuria
• Serum creatinine above 2.0 mg/dL (males) or above 1.8 mg/dL (females)
• Creatinine clearance below 50 mL/min
• Use of potassium supplements or other potassium-sparing diuretics

Interactions with CYP3A Inhibitors

• Strong CYP3A inhibitors (for example ketoconazole, itraconazole, clarithromycin, ritonavir) are contraindicated with eplerenone.
• Moderate CYP3A inhibitors do not carry the same restriction, but the eplerenone dose needs to be reduced if they cannot be avoided.

Always tell your doctor about every medicine and supplement you take.

Common Brands in India

Commonly listed brands in India include Eptus and other eplerenone products. Availability varies by location and may change over time.

Approximate Price in India

Eptus 25 mg (15 tablets): approximate MRP ₹675. Prices vary by brand, strength, pack size, pharmacy, location, batch and discounts, so check with your pharmacist for the current price.

How HealthPil Can Help

HealthPil offers cardiology consultations to help you understand your heart medicines and monitoring. A doctor can review your treatment in the context of your health.