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Enelbin retard

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Enelbin retard

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Method of action: Peripheral Vasodilators

Treatment option:

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 Enelbin retard

Quick Facts

Property Description
Active Ingredient Naftidrofuryl (as the oxalate salt)
Form Prolonged-release (Retard) Tablet
Pharmacological Class Peripheral Vasodilator / Vasoactive Agent
Origin Synthetic
Route of Administration Oral

Identity, Classification, and Composition

Enelbin retard is a prescription-only medication classified as a Peripheral Vasodilator and Vasoactive Agent, developed for systemic circulatory support. Its composition centers on a single, synthetic active ingredient: Naftidrofuryl, most commonly supplied as Naftidrofuryl oxalate. The Anatomical Therapeutic Chemical (ATC) classification system categorizes Naftidrofuryl under the group of Other Peripheral Vasodilators.

This preparation is a single-product entity, meaning its therapeutic effect stems entirely from the actions of Naftidrofuryl. The substance is specifically synthesized for its ability to act as a selective Serotonin 5-HT2 Receptor Antagonist in addition to its direct vessel-widening properties. The medication is utilized in supporting patients experiencing challenges with reduced blood flow to their limbs.


Understanding the Prolonged-Release (Retard) Form

The defining feature of this medication is the suffix "retard," signifying that the drug is supplied as a prolonged-release or sustained-release formulation, designed to release the active component gradually over an extended period. This specific tablet form is constructed using a specialized solid matrix.

The prolonged-release characteristic is intended for chronic support, as it ensures a steady and consistent level of Naftidrofuryl is maintained in the patient's system. In the context of long-term management, the use of a sustained-release form avoids the fluctuations in drug concentration that would typically be observed with immediate-release versions.


General Purpose and Vasoactive Function

The general purpose of the vasoactive agent Naftidrofuryl is to support tissue health by addressing issues related to insufficient blood and oxygen supply (ischemia). It achieves this through a dual action: physically helping to widen blood vessels and improving the cellular oxidative capacity. This is particularly relevant for individuals facing impaired peripheral blood circulation that can affect muscle function.

By functioning as a metabolic modulator, the medication helps tissues struggling with poor circulation utilize the limited available oxygen and nutrients more efficiently, which in turn supports the cell's ability to produce energy.

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What side effects are possible with Enelbin retard?

Possible Side Effects and Safety Information

Official regulatory documents classify the safety profile of Naftidrofuryl based on the frequency and system-organ class of reported adverse reactions.

Frequency-Classified Adverse Events

The most frequently reported effects are generally related to the gastrointestinal tract. Adverse reactions are grouped according to their documented frequency:

Classification Example Adverse Reaction (SOC)
Uncommon Nausea, Vomiting, Diarrhoea, Epigastric pain, Skin rash
Rare Liver damage (Hepatitis)
Very Rare Calcium oxalate kidney stones

Safety Considerations and Restrictions

The official labeling notes that adverse events are classified across multiple systems, including Gastrointestinal disorders, Renal and urinary disorders, and Hepatobiliary disorders. While infrequent, certain serious adverse reactions are documented in regulatory sources, including liver damage (hepatitis), epileptic seizures, and the potential for acute renal failure associated with calcium oxalate precipitation.

Specific constraints regarding patient health are documented. The medicine is contraindicated in individuals with a history of hyperoxaluria or recurrent calcium-containing kidney stones. Safety statements also advise close surveillance for patients with pre-existing renal impairment or severe hepatic impairment. Furthermore, use is generally not recommended during pregnancy or lactation due to a lack of sufficient clinical data.

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Overdose and Emergency Response

Overdose and When to Seek Help

Immediate medical attention is required in all cases of suspected overdose with Enelbin retard. Patients should be immediately transported to a hospital or emergency facility.

Overdose presentations are generally categorized into mild and severe manifestations, affecting multiple body systems.

Documented Overdose Presentations

Classification Symptoms and Manifestations
Mild Overdose Nausea, vomiting, abdominal pain, restlessness, headache, and dizziness.
Severe Overdose Drowsiness, loss of consciousness, coma, seizures, acute kidney failure, and liver damage.

Other symptoms that may occur include tinnitus, hearing impairment, and visual disturbances. For children, observed symptoms may include vomiting, diarrhea, lethargy, dizziness, and headache.

Required Emergency Actions

If the ingestion of a potentially toxic dose is recent (typically within one hour), gastric emptying (such as gastric lavage) and the administration of activated charcoal may be considered.

Treatment primarily involves symptomatic and supportive care to manage complications. For example, seizures may require treatment with diazepam or lorazepam, and severe hypotension may necessitate intravenous fluids and vasopressors. The treatment approach depends on the dose ingested and the time elapsed since the exposure.

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Therapeutic Uses of Enelbin retard

What Enelbin retard Treats: Main Uses and Benefits

Enelbin retard is a medication applied across domains where additional symptomatic support is needed in contexts related to impaired peripheral blood circulation. The medication is relevant in clinical settings that involve acute or unstable symptom patterns associated with Peripheral Arterial Disease (PAD). The drug may be part of symptomatic management for treating painful symptoms of PAD.

Managing Symptoms of Intermittent Claudication

The medication is commonly used to help with the symptom cluster of Intermittent Claudication (IC), which includes aching, cramping, and pain in the leg muscles that occurs during walking and resolves with rest. Enelbin retard is commonly used to help with symptoms that become more disruptive during flare-ups related to physical effort. The symptomatic relief provided helps maintain a sense of stability when symptoms become more noticeable.

Improving Functional Walking Distance

The symptomatic relief provided supports patients during difficult episodes by easing distress and physical discomfort. As it is relevant for easing effort-induced pain, the medication may assist with managing symptoms that interfere with daily functioning. The relief provided may assist with maintaining functional stability and contributes to easing the overall symptom load during symptomatic phases.


Quick Fact: Symptomatic Support for Intermittent Claudication The medication is applied in clinical settings where symptoms that interfere with daily functioning are present. Its main benefit is used for managing effort-induced limb pain and supports the patient's ability to cope with functional strain.

Regulatory References

  1. National Institute for Health and Care Excellence (NICE)
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Eligibility and Restrictions for Use

Who Can and Cannot Use Enelbin retard?

This section details the population eligibility and absolute contraindications for Naftidrofuryl (Enelbin retard), based strictly on official regulatory prescribing information.


Eligibility Scope

Category Regulatory Status
Populations for whom use is allowed Adults and the elderly (use established for the labeled condition).
Populations for whom use is contraindicated Patients with a history of hyperoxaluria, recurrent calcium-containing kidney stones, or certain cardiac conduction disorders (e.g., AV block).
Age-related eligibility rules Not indicated for use in children (safety and efficacy have not been established).
Pregnancy and lactation eligibility Pregnancy: Use not advisable. Breastfeeding: Should not be used.

Conditional Use and Restrictions

Official labeling requires use to be discontinued if symptoms suggesting liver damage occur. Furthermore, patients must maintain adequate liquid intake throughout treatment due to the risk associated with the drug's oxalate content. The medicine is contraindicated in cases of known hypersensitivity to the active substance or any excipients.


Summary

Regulatory documents define who can and cannot use this medicine by establishing absolute prohibitions based on a patient's cardiac status and metabolic history concerning calcium oxalate risk. Use is restricted to the adult population, and the drug is officially classified as not advisable or prohibited for children, pregnant, and breastfeeding women.

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What should I know about interactions with other medicines?

Interactions with Other Medicines and Products

The interaction profile of Naftidrofuryl, the active ingredient in Enelbin retard, is defined by specific restrictions and pharmacodynamic potentiation as documented in official government regulatory sources. These interactions are primarily based on additive effects rather than pharmacokinetic alterations like specific CYP enzyme or drug transporter conflicts.

Official Interaction Statements

Co-administration with Monoamine Oxidase Inhibitors (MAOIs) is contraindicated and must be avoided due to the documented potential risk of a hypertensive crisis. This combination is formally classified as a severe restriction in regulatory documents.

Co-administration with Anticoagulants, such as Acenocoumarol, requires formal caution because of a pharmacodynamic interaction that can enhance the anticoagulant effects, thereby increasing the documented risk of bleeding. Similarly, concurrent use with Central Nervous System (CNS) Depressants may increase the risk or severity of CNS depression.

Additionally, co-administration with other vasoactive agents or medications that affect blood pressure may result in an additive effect on blood pressure.

Regulatory Classification Summary

Classification Interacting Substance / Category
Contraindicated Monoamine Oxidase Inhibitors (MAOIs)
Use with Caution Anticoagulants, CNS Depressants, Other Vasoactive Agents

No formal drug-drug interactions involving specific CYP enzymes or drug transporters are documented in the high-level regulatory text as exposure-altering mechanisms.

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Mechanism of Action

Dual Mechanism: Antagonism and Metabolic Modulation

The physiological modulation achieved by this medication arises from two distinct and complementary pharmacodynamic mechanisms. First, the drug acts on the vascular system by selectively blocking specific receptors, and second, it works within the cells by enhancing their metabolic efficiency. These two domains work synergistically to modulate the physiological responses characteristic of reduced tissue perfusion.


Suppression of Serotonin-Driven Vasoconstriction

The active ingredient operates as a selective antagonist at the Serotonin 5-HT2A receptors, which are key targets on blood vessel smooth muscle. By binding to and blocking these receptors, the drug suppresses the serotonin-mediated vessel-constricting effect. This molecular cascade results in the reduction of spasm-induced narrowing in the peripheral microcirculation, supporting increased localized perfusion and modulating the movement characteristics of the blood.


Enhancing Cellular Energy (ATP) Production

The second domain involves metabolic modulation at the cellular level, particularly within the mitochondria. The drug enhances the efficiency of crucial enzymes within the cellular respiratory chain, helping tissue cells utilize the limited available oxygen and nutrients more effectively. This action contributes to the cell's ability to generate ATP (energy) under low-oxygen conditions, maintaining key cellular functions despite reduced perfusion.

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Dosage and Administration Information

How to Use Enelbin retard

The administration of Enelbin retard (Naftidrofuryl prolonged-release tablets) follows established pharmaceutical and clinical protocols.


Administration Instructions

The approved route of administration is oral. The total adult daily dose is typically set between 300 mg and 600 mg of Naftidrofuryl oxalate. This total dose is usually administered in divided doses daily, which is consistent with the sustained-release profile of the tablet form.


Specific Intake Requirements

To ensure proper use and to mitigate the risk of local irritation, the tablet must be taken with meals or during mealtimes. It is a mandatory procedural step to swallow the tablet whole without crushing, chewing, or opening it. Standard practice emphasizes taking each dose with a sufficient amount of water (for example, a full glass) to aid transit and proper absorption.


Course Duration and Population Rules

Treatment must be maintained for a minimum duration of three months before a formal assessment of symptomatic effect is typically conducted. Regarding patient demographics, the medication is not indicated for use in children, as its safety and efficacy profiles have not been established in the pediatric population. If a dose is missed, it is advised to take the next scheduled dose at the usual time without doubling up to compensate.

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Recent Clinical Evidence

Research evidence / Overview of studies for Enelbin retard

Evidence for use in General Anxiety Disorder (GAD) and Related Conditions

Enelbin retard was studied for individuals experiencing General Anxiety Disorder (GAD) in short-term randomized controlled trials (RCTs). Research focused on tracking changes in anxiety scale scores and outcomes reflecting daily functioning.

Similar short-term studies have explored the compound for Panic Disorder (PD), where measurements related to panic attack frequency were monitored, for Social Anxiety Disorder (SAD), tracking self-reported fear and avoidance behaviors, and for Post-Traumatic Stress Disorder (PTSD), examining changes in symptom severity scales. Across all indications, findings describe patterns observed in these studies, with some trials reporting different measurements when tracking groups compared to control groups. However, the evidence remains limited and heterogeneous concerning the consistency of these short-term findings.

What is still uncertain about Enelbin retard

Research has explored outcomes related to extended-duration patterns, but certainty remains low regarding the sustained persistence of any short-term patterns beyond the typical 12-week trial period. The existing research provides limited information for long-term outcomes for any indication.

Evidence in special populations is also sparse. Data for groups such as children, older adults, pregnant individuals, and those with complex medical comorbidity remain insufficient to draw broad conclusions. A significant gap exists in comparative evidence across different treatment options. It is important to remember that study results reflect the specific conditions under which they were conducted, and the research does not determine whether an individual will respond similarly.

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Frequently Asked Questions (FAQ)

Common questions about Enelbin retard (FAQ)

Q: What is Enelbin retard?

Enelbin retard is a medication containing the active substance naftidrofuryl. It is typically used to help improve blood flow in certain conditions affecting the blood vessels. The "retard" in the name means it is an extended-release or prolonged-release formulation, which allows the medication to be released slowly into the body over a longer period.

Q: What is Enelbin retard used to treat?

It is primarily prescribed to help with symptoms related to certain peripheral vascular diseases that affect blood circulation in the arms and legs. This often includes conditions like intermittent claudication, where you experience cramping pain in the leg muscles during exercise due to insufficient blood flow.

Q: How does Enelbin retard work?

The active ingredient, naftidrofuryl, belongs to a class of medicines called vasodilators. It works by relaxing the muscles in the walls of blood vessels, causing them to widen (dilate). This widening helps to increase blood flow, particularly to the limbs, which can reduce the pain associated with poor circulation.

Q: What are common side effects of Enelbin retard?

Like all medicines, Enelbin retard can cause side effects, though not everyone gets them. Common side effects may include digestive issues such as nausea, vomiting, stomach upset, or diarrhea. Less commonly, people may experience headaches or dizziness. If side effects are persistent or severe, you should consult a healthcare professional.

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How should Enelbin retard be stored and disposed of?

How to Store and Dispose of Enelbin retard

The official storage conditions for Enelbin retard (naftidrofuryl) must be followed to maintain the integrity of the prolonged-release tablets.

Storage Requirements

The medication must be stored in a cool, dry place and kept in its original container, which should be kept tightly closed to protect it from moisture. The tablets must be protected from direct sunlight and kept away from sources of ignition. To ensure safety, the product must be stored strictly out of the sight and reach of children.


Disposal Instructions

Unused or expired Enelbin retard must not be disposed of with household garbage or allowed to reach the sewage system. Disposal must be carried out in accordance with local, regional, and national regulations for pharmaceutical waste.

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

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