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Инспра

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Инспра

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Method of action: Diuretic

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

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Overview of Инспра

Property Description
Active ingredient Eplerenone
Form Film-coated tablets
Pharmacological class Selective Aldosterone Receptor Antagonist (SARA)
General purpose Cardiovascular system support, blood pressure regulation, heart protection
Origin Synthetic (steroidal derivative)

Инспра: Composition, Origin, and Pharmaceutical Form

Инспра is a pharmaceutical product whose active ingredient is Eplerenone, a synthetic compound derived from steroids. The medicine is a prescription-only (Rx) medication, supplied for oral administration in the form of film-coated tablets and is classified as a single-ingredient product. Eplerenone is the essential substance that delivers the therapeutic effect, distinguishing it from the various inactive components, or excipients, used in the tablet formulation, such as lactose. The specific Eplerenone compound is structurally engineered for highly targeted action within the body, a characteristic reflected in its purity and targeted biological properties.


Pharmacological Classification and Selectivity of Eplerenone

Инспра belongs to the pharmacological class known as a Selective Aldosterone Receptor Antagonist (SARA), which is a specific type of Mineralocorticoid Receptor Antagonist (MRA). This classification means the drug's core function is to block the effect of the endogenous hormone Aldosterone by fitting into the Mineralocorticoid receptor (MR). Eplerenone is noted for its high selectivity, meaning it primarily targets the MR while exhibiting minimal binding affinity to other steroid receptors. This characteristic minimizes potential interference with other hormonal systems, providing a highly focused therapeutic approach to modulating the RAAS system, especially when compared to non-selective analogues like Spironolactone.


The General Purpose of Aldosterone Receptor Blockade

The general purpose of this action is to improve the efficiency and function of the cardiovascular system by managing fluid balance and tissue health. By preventing the actions of Aldosterone, Eplerenone promotes the excretion of sodium and water by the kidneys, which helps reduce excessive blood volume and thereby lower high blood pressure. Furthermore, this targeted antagonism provides an anti-fibrotic action, offering essential protection to the heart muscle and blood vessel walls from the long-term, damaging effects associated with chronic activation of the aldosterone system. Eplerenone is used in managing conditions that require long-term support for cardiovascular structural integrity.

Regulatory References

  1. Eplerenone in patients with left ventricular dysfunction after myocardial infarction (EPHESUS)
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What side effects are possible with Инспра?

Possible Side Effects and Safety Information

The official safety profile for Eplerenone (Инспра) is fundamentally defined by its primary action as an aldosterone antagonist, leading to specific electrolyte-related risks and a range of adverse reactions classified by frequency.


Primary Safety Risk and Serious Adverse Reactions

The most clinically significant and often-reported safety consideration is hyperkalemia (elevated serum potassium), which is classified as a Common adverse reaction. Unrecognized hyperkalemia can lead to serious, life-threatening cardiac arrhythmias, as documented in regulatory texts. Hypersensitivity reactions, such as rapid swelling known as angioedema, are also reported.


Frequency and Systemic Classification

Adverse reactions are grouped by the affected System-Organ Class (SOC). In addition to hyperkalemia, Common effects listed in regulatory labeling often include increased creatinine (an indication of changes in kidney function), dizziness, diarrhea, cough, fatigue, and influenza-like symptoms. These reactions fall under SOC categories such as Metabolism and nutrition disorders, Investigations, and Nervous system disorders.


Safety Constraints and Special Populations

Official labeling imposes strict limitations for use. Eplerenone is contraindicated in patients presenting with pre-existing high potassium levels, severe renal impairment, or severe hepatic impairment. The risk of hyperkalemia is heightened in older adults and patients with diabetes. Regulatory documents specifically note that the risk of potassium elevation is highest during treatment initiation and following any dose adjustment, necessitating careful observation during these periods.

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Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documentation for Eplerenone (Инспра) defines the overdose profile primarily by its two most likely clinical and laboratory manifestations. Overexposure may result in an extension of the drug's effects, presenting as hypotension (abnormally low blood pressure) and hyperkalemia (abnormally high serum potassium levels).

Severe hyperkalemia is considered the principal serious risk, carrying the potential for life-threatening arrhythmias (irregular heartbeats). Symptoms associated with these conditions can include dizziness, fainting, weakness, and an irregular heart rhythm.

Regulatory authorities mandate that individuals seek immediate medical attention for any suspected overdose. Emergency services or a Poison Control Center must be contacted if the individual is experiencing severe symptoms such as seizures, trouble breathing, or is unresponsive.

Management of Eplerenone overdose is restricted to symptomatic and supportive treatment, as no specific antidote is known. Procedures to be considered, based on regulatory guidance, include activated charcoal or gastric lavage if ingestion was recent. Treatment focuses on continuous monitoring of serum potassium levels and blood pressure, alongside measures to correct the underlying electrolyte imbalance. The drug is not removable by hemodialysis.

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Therapeutic Uses of Инспра

What Инспра Treats: Main Uses and Benefits

Инспра, containing Eplerenone, is generally applied in managing complex cardiovascular conditions, focusing on structural support, fluid balance, and blood pressure regulation. The medication is used to address two major clinical areas: supporting stabilization in high-risk cardiac patients and managing systemic hypertension.


Therapeutic Contexts

This medication is commonly applied in therapeutic contexts involving significant physiological strain. These conditions include chronic Heart Failure with Reduced Ejection Fraction (HFrEF), patient support following a Myocardial Infarction (MI) with heart muscle weakness, and the management of Resistant Hypertension.

Eplerenone is commonly used to support the stabilization of high-risk patients who have experienced a heart attack. This use may assist with supporting the patient's general well-being by contributing to supporting the cardiovascular structural integrity. In patients with chronic heart failure, this support contributes to easing the overall symptom burden, such as shortness of breath and peripheral swelling, and assists with maintaining functional stability.


Quick Facts on Use

  • Post-MI Support: Used in situations involving patients who require long-term assistance in maintaining cardiovascular structural integrity after a heart attack.
  • Fluid Balance: Helps address symptom clusters related to systemic imbalance by assisting with fluid and electrolyte management.
  • Blood Pressure: Is commonly used to help with conditions where high vascular pressure may intensify temporarily, such as in Resistant Hypertension.
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Eligibility and Restrictions for Use

The official eligibility profile for Инспра (Eplerenone) is determined by regulatory agencies based on the patient's physiological status, concurrent conditions, and other medications being used. Use is strictly limited to adult patients.

Contraindicated Populations (Must Not Use)

Contraindication Regulatory Threshold
High Serum Potassium Level greater than 5.5 mEq/L (5.0 mmol/L in some regions) at treatment initiation.
Severe Renal Impairment Creatinine clearance ( CrCl) le 30 mL/min in all patients.
Severe Hepatic Impairment Child-Pugh Class C (use has not been evaluated).
Potassium-Related Medications Concomitant use with potassium supplements or other potassium-sparing diuretics.
Drug Interactions Concomitant use with strong CYP3A4 inhibitors (e.g., Ketoconazole, Itraconazole).

Condition-Based Restrictions

  • Moderate Impairment: Use requires caution and close monitoring of serum potassium in patients with moderate renal function ( CrCl le 50 mL/min) or mild-to-moderate liver impairment.
  • Hypertension Patients: Additional contraindications apply when treating high blood pressure, including in patients with Type 2 Diabetes with microalbuminuria or CrCl < 50 mL/min.

Age and Reproductive Status

  • Pediatric Use: Safety and efficacy are generally not established or not recommended for children and adolescents.
  • Older Adults: No initial dose adjustment is required, but an increased risk of high potassium necessitates periodic monitoring.
  • Pregnancy/Lactation: Use is governed by insufficient data; a risk-benefit assessment or discontinuation of the medicine or breastfeeding is required as per labeling.
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What should I know about interactions with other medicines?

Eplerenone (Inspra) Interactions with Other Medicines and Products

It is crucial to inform your healthcare provider about all medicines you are taking, including prescription and non-prescription drugs, supplements, and herbal products, as they may interact with eplerenone (the active ingredient in Inspra). These interactions can alter the effectiveness of eplerenone or increase the risk of serious side effects, particularly hyperkalemia (high potassium levels).


Significant Drug Interactions

The following are examples of medicines that may interact with eplerenone. This list is not exhaustive.

Interaction Category Examples of Interacting Medicines Potential Effect
Strong CYP3A4 Inhibitors Ketoconazole, Itraconazole, Ritonavir, Clarithromycin Substantially increased eplerenone concentration; Contraindicated
Potassium-Sparing Diuretics Spironolactone, Amiloride, Triamterene Increased risk of severe hyperkalemia; Contraindicated
Potassium Supplements All potassium salts Increased risk of severe hyperkalemia; Contraindicated
ACE Inhibitors/ARBs Lisinopril, Losartan Increased risk of hyperkalemia and renal impairment
NSAIDs Ibuprofen, Naproxen Increased risk of hyperkalemia and decreased kidney function
Lithium Lithium salts Increased lithium toxicity

Other Interactions

Avoid using salt substitutes that contain potassium while taking eplerenone, as this can increase the risk of hyperkalemia. Regularly monitor your potassium levels as advised by your doctor, especially when starting a new medication.

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Mechanism of Action

Selective Mineralocorticoid Receptor Blockade

Инспра (Eplerenone) operates through a selective molecular mechanism, acting as a competitive antagonist against the hormone Aldosterone specifically at the Mineralocorticoid Receptor ( MR). By binding to the MR, Eplerenone prevents Aldosterone from initiating the gene transcription that drives salt and water retention. This mechanism is selective, demonstrating minimal interaction with other major hormonal systems.

Dual Physiological Consequences: Volume and Structure

The molecular blockade leads to a dual effect on the body's physiology. In the kidneys, blocking the MR suppresses the reabsorption of sodium and water, causing fluid to be excreted (natriuresis). Separately, in the myocardium and blood vessels, this antagonism inhibits the pro-fibrotic signaling cascades. This limits chronic tissue scarring and stiffening, modulating the structural integrity of cardiac and vascular tissue.

Mechanistic Onset Profile

The full physiological changes are observed over different timelines. The fluid-modulating effects related to sodium and volume regulation manifest relatively sooner. However, the effects on tissue structure, which depend on inhibiting gene transcription and halting the gradual process of tissue remodeling (fibrosis), require a prolonged period of consistent MR blockade to fully develop.

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Dosage and Administration Information

How to use Инспра (Eplerenone)

Инспра (eplerenone) is an oral medication taken as a tablet, with or without food, typically once or twice daily, as directed by a healthcare provider. It is crucial to adhere precisely to the prescribed regimen and not to increase or decrease the dose or stop the medication without consulting your doctor.

Dosing and Titration

For Congestive Heart Failure post-myocardial infarction, treatment is typically initiated at 25 mg once daily and may be increased to a target dose of 50 mg once daily, preferably within four weeks, depending on patient tolerance and laboratory results.

For Hypertension, the usual starting dose is 50 mg once daily. If the blood pressure response is inadequate after approximately four weeks, the dosage may be increased to a maximum of 50 mg twice daily (100 mg per day).

Important Monitoring

Because eplerenone can increase serum potassium levels, close monitoring is essential. Your doctor will measure your serum potassium and serum creatinine (to assess kidney function) before starting treatment, within the first week, one month after starting treatment or dose adjustment, and periodically thereafter.

Serum Potassium (mEq/L) Action Dose Adjustment Examples
< 5.0 Increase 25 mg every other day to 25 mg once daily; 25 mg once daily to 50 mg once daily.
5.0–5.4 Maintain No adjustment required.
5.5–5.9 Decrease 50 mg once daily to 25 mg once daily; 25 mg once daily to 25 mg every other day.
≥ 6.0 Withhold Restart at 25 mg every other day when level falls below 5.5 mEq/L.

Consult your healthcare provider immediately if you experience signs of high potassium, such as muscle weakness, slow or irregular heartbeat, or confusion. Do not use potassium-containing salt substitutes or potassium supplements unless advised by your doctor.

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Recent Clinical Evidence

Research Evidence / Overview of Studies for Инспра (Eplerenone)

The clinical research for Инспра (Eplerenone) primarily involves large Randomized Controlled Trials (RCTs) studying specific heart conditions, alongside studies that examine its activity related to blood pressure. This evidence contributes to the broader landscape of how the medicine was observed in different patient groups and clinical settings.


Evidence for Use in Post-Heart Attack Support (Post-MI) with Heart Failure

Research in this area was largely based on a major international RCT that was studied for its impact on stable adult patients with heart muscle weakness (reduced ejection fraction) after a recent MI. These trials were specifically designed to track long-term, critical events, examining all-cause mortality and a composite outcome of cardiovascular death and first hospitalization for a cardiovascular issue.

During the intermediate-term observation period, the findings suggest patterns where the recorded rate of the primary composite endpoint differed between the Eplerenone group and the placebo group. Data also show patterns related to the all-cause mortality events recorded in the Eplerenone group compared to the placebo group. The evidence is focused specifically on patients with a reduced ejection fraction (HFrEF); data for individuals with severe kidney problems or elevated potassium levels are insufficient, as these groups were excluded.


Evidence for Use in Chronic Heart Failure with Mild Symptoms

A separate large RCT was evaluated in adult patients with chronic heart failure experiencing only mild symptoms (NYHA Class II) but still having reduced heart function. The primary measurement focused on a composite outcome that tracked cardiovascular death or first hospitalization for heart failure. The findings indicate that the recorded rate of the primary endpoint varied between the Eplerenone group and the placebo group. Subgroup analysis for certain secondary endpoints for older adults (75 years old) revealed some areas where the recorded findings were mixed, meaning certainty remains low for this specific age group in relation to certain outcomes.


Evidence for Use in Managing High Blood Pressure (Hypertension)

Research exploring the use of Eplerenone for high blood pressure was conducted through various RCTs, typically lasting only a few weeks to months. These studies were evaluated in adults with mild-to-moderate high blood pressure, as well as specific patient groups with resistant hypertension. The primary goal was to measure the change from baseline in seated systolic and diastolic blood pressure.

These studies report how blood pressure evolved in the observed populations, documenting that the addition of Eplerenone was associated with documented changes in blood pressure readings compared to placebo over a short-term observation period. A key limitation is that follow-up durations were limited (often 6 to 16 weeks), and the evidence relies on blood pressure measurements, which are considered surrogate markers rather than direct measures of cardiac events.

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Frequently Asked Questions (FAQ)

Common questions about Инспра (FAQ)

Q: How quickly does Инспра start working after taking the first dose?

A: Official information indicates that the concentration of the drug reaches its peak in the blood approximately 1.5 hours after being taken. However, for conditions like high blood pressure, the full therapeutic effect may take up to four weeks of consistent use to become apparent.

Q: What happens if I miss a dose of Инспра?

A: If a dose is forgotten, and it is remembered on the same day, official guidance is to take it right away. If the dose is forgotten for the entire day, official guidance is to skip the missed dose entirely and continue with the regular schedule. Taking two doses at once to compensate for a forgotten one is not recommended.

Q: Are there common side effects that usually go away?

A: Regulatory documents report common adverse effects, such as dizziness, diarrhea, or tiredness, which are sometimes observed to be temporary. If these effects are mild, they might resolve on their own within the first few days or weeks as the body adjusts to the medication.

Q: Is it necessary to avoid certain foods while taking this medicine?

A: While there are generally no food restrictions, official product information suggests patients avoid low-sodium salt substitutes. This is because these products often contain potassium, and using them can increase the risk of developing hyperkalemia (high potassium levels) in the blood when taken with this medicine.

Q: Does Инспра cause weight changes?

A: Clinical trial data reviewed in regulatory documents do not list general weight changes as a common or frequent side effect associated with this medication.

Q: Is there a generic version of Инспра available?

A: Yes, regulatory authorities have approved generic forms of the active ingredient, eplerenone. This means a generic version is available in certain strengths, depending on your region.

Q: How long does the effect of one dose of Инспра usually last?

A: Pharmacokinetics data indicate that the drug has an elimination half-life of approximately 3 to 6 hours. The half-life refers to the time it takes for the concentration of the medicine in the body to decrease by half.

Q: Is Инспра meant to be a long-term treatment?

A: The treatment course described in official patient counseling is typically intended for long-term use. This is especially true when the drug is prescribed for conditions like heart failure.

Q: Does research show that Инспра helps reduce hospital stays for heart problems?

A: Clinical trials for heart failure (Post-MI and Chronic HF) tracked a composite outcome that included a measure of first hospitalization for a cardiovascular issue. This data contributed to the overall evidence base.

Q: If I feel better, can I stop taking Инспра?

A: Official patient guidance states that sudden discontinuation of the medicine should be avoided without consulting a healthcare provider first. Stopping the medication could potentially cause the underlying heart condition to worsen.

Q: Is the name Инспра the brand name or the name of the active drug?

A: Инспра (Inspra) is the brand name, or trade name, used to market the product. The name of the active ingredient contained within the tablet is eplerenone.

Q: Can Инспра affect blood sugar levels?

A: While not a common side effect, official labeling advises caution when using the drug in patients with Type 2 Diabetes and kidney issues. This is due to a heightened risk of high potassium, not a direct effect on blood sugar levels.

Q: Are headaches a common side effect of Инспра?

A: Headache is listed as a reported adverse reaction in clinical studies. However, regulatory documents do not classify it as one of the most common or frequently reported side effects.

Q: Does Инспра interact with alcohol?

A: Official health guidance notes that alcohol consumption should be limited or avoided, particularly when starting treatment. This is because alcohol may increase the experience of side effects like dizziness or lightheadedness.

Q: Is Инспра used for conditions other than heart failure and hypertension?

A: The official regulatory approvals (indications) for this medicine are strictly limited to the treatment of high blood pressure (hypertension) and to support patients with heart failure following a heart attack.

Q: Does Инспра cause muscle cramps or spasms?

A: Muscle cramps and muscle weakness are described as recognized symptoms of a serious adverse reaction called hyperkalemia (high potassium levels), which can be caused by this medication. Monitoring for these types of symptoms is part of the drug’s safety information.

Q: Can taking Инспра affect cholesterol levels?

A: Clinical trial data indicate that high cholesterol, known as hypercholesterolemia, was reported as an adverse reaction in some patients. It is not listed as a frequent or common effect.

Q: What happens if a child accidentally takes Инспра?

A: If a child accidentally takes more than the prescribed amount, official medical guidance is that emergency medical services or a poison control center should be contacted immediately. Symptoms of overdose can include an irregular heartbeat, confusion, or muscle weakness.

Q: Are there any restrictions on driving or operating machinery while taking Инспра?

A: Official guidance states that driving a car or operating heavy machinery is restricted if the medication causes dizziness or tiredness. These activities should be avoided until the patient knows how the medicine affects them.

Q: Is it normal to experience stomach upset when beginning treatment?

A: Yes, regulatory documents list both diarrhea and abdominal pain as adverse reactions reported during clinical studies. These are examples of gastrointestinal upset that may occur.

Q: Does the time of day I take Инспра matter?

A: Official patient information notes that taking the medicine at the same time every day is recommended. This consistency helps with adherence and remembering the daily dose.

Q: What should I do if my symptoms worsen while on Инспра?

A: Regulatory safety warnings indicate that a healthcare provider should be contacted immediately if a worsening of symptoms is experienced. This includes fast or irregular heartbeats, trouble breathing, or swelling in the feet or lower legs.

Q: What is the main difference between Инспра and other water pills (diuretics)?

A: Инспра belongs to a specific drug class known as a selective aldosterone receptor antagonist. Unlike general diuretics, its primary mechanism is to specifically block the effects of the hormone aldosterone, which then leads to the excretion of water and sodium.

Q: What are the signs of having too much potassium (hyperkalemia) while taking Инспра?

A: Signs of elevated potassium levels may include muscle weakness, unusual tiredness, a tingling sensation, chest pain, or an irregular heartbeat. Official documents highlight that these symptoms should be reported to a healthcare provider immediately.

Q: Does grapefruit juice interact with Инспра?

A: Yes, official drug interaction resources advise that the consumption of grapefruit, grapefruit juice, or any supplements containing grapefruit is not recommended. These products may increase the amount of the drug circulating in the blood.

Q: Are there any cold or flu medicines that should not be taken with Инспра?

A: Official interaction warnings note that certain non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen and naproxen, can increase the risk of high potassium and kidney problems. These are often ingredients in over-the-counter cold and flu remedies.

Q: Is Инспра safe to take if I have kidney issues?

A: Regulatory documents state that this medicine is contraindicated (must not be used) in patients with severe kidney impairment. For those with moderate impairment, the medicine requires close monitoring and caution due to the risk of high potassium and changes in kidney function.

Q: Can people with liver problems use Инспра?

A: The medicine is contraindicated in cases of severe liver impairment (Child-Pugh Class C). For mild to moderate liver impairment, official labeling requires the medicine to be used with caution and under close monitoring.

Q: Is this medicine appropriate for older adults (the elderly)?

A: Regulatory guidelines indicate that no initial dose change is required based on age alone. However, older patients are described as having an increased risk of high potassium levels, which means they require close and periodic monitoring.

Q: Can women take Инспра during pregnancy or breastfeeding?

A: Use during pregnancy is governed by a risk-benefit assessment made by the prescribing doctor. In terms of breastfeeding, official documents state it is unknown whether the drug passes into human milk, requiring a decision to either discontinue the medicine or stop breastfeeding.

Q: What is the risk of having an allergic reaction to Инспра?

A: Official warnings note that severe allergic reactions, including difficulty breathing and swelling of the face, lips, or tongue (angioedema), have been reported. A severe reaction is considered a medical emergency.

Q: Why is my doctor checking my blood work frequently while I'm on Инспра?

A: Frequent blood tests are required to measure serum potassium and creatinine (a measure of kidney function) levels. This is due to the drug's known ability to increase potassium to dangerous levels, particularly when starting treatment or changing the dose.

Q: Are there reports of Инспра interacting with supplements or herbal remedies?

A: Regulatory information specifically contraindicates the use of potassium supplements, as they significantly increase the risk of severe high potassium. Patients should ensure their healthcare provider is informed about all supplements and herbal products they are taking.

Q: What is the highest-level safety classification for Инспра?

A: The highest level of restriction in the drug's safety profile is the Contraindication. This applies to conditions where the medicine should absolutely not be used, such as pre-existing high potassium levels or severe kidney impairment.

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How should Инспра be stored and disposed of?

How to Store and Dispose of Инспра (Eplerenone)

Official regulatory information requires specific conditions to maintain the stability and safety of this medication.

Storage Requirements

Classification Official Requirement
Temperature Store at room temperature (or no special storage conditions required for some forms).
Protection Keep away from excess heat and moisture. Do not store in the bathroom.
Container Keep in the container it came in, tightly closed.
Shelf Life Officially documented stability ranges from 24 to 36 months, depending on formulation and packaging.

Child Safety and Disposal

Authorities mandate that the medication must be stored out of sight and reach of children, and safety caps should be locked. Disposal of any unused or expired medication must be carried out by following federal guidelines for medication disposal.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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