Eptus

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What Is Eptus?

Eptus is 25 / 50 mg eplerenone tablets from Sun Pharma, supplied in 30-90 tablets. Eplerenone was introduced by Pfizer in 2002 as Inspra — the first selective mineralocorticoid receptor antagonist, developed specifically to avoid the anti-androgen side effects of spironolactone (gynaecomastia, menstrual irregularity, decreased libido) by eliminating cross-reactivity with progesterone and androgen receptors.

How Eplerenone Works

Eplerenone selectively antagonises the mineralocorticoid receptor (MR) in the principal cells of the cortical collecting duct. Effects:

• Reduced sodium reabsorption, reduced potassium excretion — mild natriuresis with potassium retention (potassium-sparing)
• Anti-fibrotic and anti-remodelling effects on myocardium — aldosterone drives cardiac fibrosis independent of its salt-retaining effect; blocking MR reduces fibrosis. Main mechanism of HF-REF mortality benefit.
• No anti-androgen or progestogenic activity — the key differentiator from spironolactone
• Shorter half-life than spironolactone (4-6 h vs 1.4 h parent + 16-24 h metabolites)
• Lower potency at MR than spironolactone — typically requires 25-50 mg for equivalent effect to spironolactone 12.5-25 mg

Evidence and Uses

EPHESUS (2003) — eplerenone 25-50 mg in 6,642 patients with post-MI LV dysfunction (EF ≤40%) + HF or diabetes. 15% reduction in all-cause mortality; 17% reduction in cardiovascular mortality; 21% reduction in sudden cardiac death. Established eplerenone as standard therapy for post-MI LV dysfunction.

EMPHASIS-HF (2011) — eplerenone 25-50 mg in 2,737 patients with NYHA II HF-REF (EF ≤35%). Stopped early for benefit: 37% reduction in CV death or HF hospitalisation; 24% reduction in all-cause mortality. Extended MR antagonist indications to mild symptomatic HF-REF (RALES had studied only severe HF).

Other uses:

• Resistant hypertension — an alternative fourth-line agent when spironolactone is intolerable due to gynaecomastia
• Primary aldosteronism (Conn syndrome) — standard medical therapy for bilateral adrenal hyperplasia when spironolactone is poorly tolerated
• HF-REF — particularly in post-MI or mild-moderate symptomatic HF

Dosage

Post-MI LV dysfunction or HF-REF: start 25 mg once daily; titrate to 50 mg once daily at 4 weeks if potassium <5.0 and tolerated.

Resistant hypertension or primary aldosteronism: 25-50 mg once daily; higher doses (up to 100 mg) occasionally in Conn syndrome under specialist care.

Administration: with or without food, once daily. Morning dosing usually easiest; not required.

Monitoring schedule:

• Baseline: potassium (must be <5.0 to start), creatinine, eGFR, BP, symptom assessment.
• 1 week: repeat potassium and creatinine.
• 1 month and 3 months: potassium, creatinine, BP.
• Ongoing: every 3-4 months, or sooner if renal function changes or interacting drug started.
• Stop or reduce: potassium >5.5, creatinine rise >30%, symptoms of hyperkalaemia (weakness, palpitations), severe hypotension.

Eplerenone vs Spironolactone

Vedlejší účinky

Časté:

• Hyperkalaemia — dose-limiting; more severe in CKD or with ACEi/ARB combinations
• Dizziness, orthostatic hypotension
• Únava
• Small creatinine rise (expected; investigate if >30%)
• Mild gastrointestinal upset

Méně časté:

• Severe hyperkalaemia with cardiac arrhythmia
• Gynaecomastia (rare vs spironolactone)
• Angioedema (rare)
• Hyponatraemia

Kontraindikace

• Hyperkalaemia >5.0 mmol/L at baseline (manufacturer cut-off 5.0; some guidelines 5.5)
• Severe renal impairment (eGFR <30)
• Addison disease
• Concurrent strong CYP3A4 inhibitors (ketoconazole, itraconazole, clarithromycin, ritonavir, nelfinavir, nefazodone)
• Concurrent potassium-sparing diuretics or potassium supplements (unless under specialist monitoring)
• Známá přecitlivělost

Pregnancy: limited data; unlike spironolactone, no anti-androgen mechanism, but safety not established — use only if benefit clearly outweighs risk. Breastfeeding: limited data; consider alternative.

Interakce s léčivy

• Strong CYP3A4 inhibitors — CRITICAL. Raise eplerenone levels 5-10 fold. Contraindicated combinations: ketoconazole, itraconazole, clarithromycin, nefazodone, nelfinavir, ritonavir. Moderate inhibitors (erythromycin, fluconazole, diltiazem, verapamil) — consider dose reduction.
• ACE inhibitors, ARBs, aliskiren — additive hyperkalaemia; monitor potassium weekly on initiation.
• Potassium-sparing diuretics, potassium supplements — additive hyperkalaemia; avoid.
• NSAID — raise AKI risk with ACEi/ARB + eplerenone (quadruple-whammy).
• Lithium — reduced clearance; monitor levels.
• St John’s Wort — induces CYP3A4; reduces eplerenone levels.

Skladování

Store Eptus below 25°C. Keep out of reach of children.

Často kladené dotazy

Why choose eplerenone over spironolactone?

Two main reasons: (1) if spironolactone has caused gynaecomastia, breast tenderness, or menstrual irregularity — eplerenone’s MR selectivity avoids these. (2) Post-MI LV dysfunction — EPHESUS specifically validated eplerenone in this population; spironolactone’s RALES studied severe HF only. Spironolactone remains cheaper and more potent per mg; eplerenone’s advantages are primarily tolerability and specific post-MI evidence.

Will Eptus raise my potassium?

Yes — eplerenone is potassium-sparing. Hyperkalaemia >5.5 is the dose-limiting toxicity, most commonly in CKD or combined with ACEi/ARB. Check at baseline (must be <5.0), 1 week, 1 month, and then every 3-4 months. Add or adjust therapy if potassium rises above 5.5.

Can I take ibuprofen with Eptus?

Short courses are usually acceptable with potassium monitoring. Chronic NSAIDs + ACEi/ARB + eplerenone substantially raise AKI risk (quadruple whammy). Prefer paracetamol.

What foods should I avoid?

Low-sodium salt substitutes (which often use potassium chloride) and high-potassium foods in large quantities (bananas, oranges, coconut water) — all push potassium higher. Normal portions are fine; avoid deliberate potassium-loading diets.

Where can I buy Eptus online?

You can buy Eptus (eplerenone 25 / 50 mg, 30-90 tablets) from MedsBase with discreet packaging and worldwide shipping.

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