Реналган

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Реналган

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Overview of Реналган

Property Description
Active ingredients Sodium Metamizole, Pitofenone, Fenpiverinium Bromide
Form Tablets, Solution for Injection
Pharmacological class Combined Spasmolytic Analgesic
General purpose Relief of pain associated with smooth muscle spasms
Origin Synthetic

The Core Identity and Classification of Реналган

Реналган is classified as a synthetic polycomponent drug, combining agents from the non-narcotic analgesic and spasmolytic pharmacological classes. Its fundamental identity is that of a combined spasmolytic analgesic, distinguished by its capacity for synergistic action where the components enhance each other's effects. This formulation—containing Sodium Metamizole, Pitofenone, and Fenpiverinium Bromide—is clinically recognized for its targeted efficacy in managing acute painful states where smooth muscle tension is a core factor. The active component, Sodium Metamizole, is a pyrazolone derivative. This dual-action approach confirms that the medicine is designed to tackle two sources of discomfort simultaneously.

Active Components and Available Forms

The medicine’s fixed formula consists of three distinct synthetic active ingredients. Sodium Metamizole provides pain relief, while the combination of Pitofenone (a myotropic spasmolytic) and Fenpiverinium Bromide (an anticholinergic spasmolytic) addresses the muscle contraction. This specific triple combination of active agents defines the medicine’s unique profile, which is also featured in several alternative, chemically identical preparations. The drug is supplied in two standard dosage forms: tablets for oral use and a sterile solution for injection, which is generally reserved for rapid administration via intramuscular or intravenous routes.

General Therapeutic Purpose and Action

The general therapeutic purpose of Реналган is the quick and effective relief of pain syndrome that arises from severe visceral spasms, such as those involved in renal colic. The preparation is designed to exert a powerful dual-effect: the analgesic action of Metamizole is combined with the comprehensive spasmolytic effects of the other two components, relieving both the sensation of pain and the underlying muscle tension. The application of this specific tri-component formula is utilized in the management of gastrointestinal and urinary tract spasms.

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What side effects are possible with Реналган?

Possible Side Effects and Safety Information

The safety profile of drugs containing metamizole, such as Реналган, is strictly monitored by regulatory authorities primarily due to the risk of serious, rare adverse reactions.


Serious Adverse Reactions

The most clinically significant safety concern is the rare risk of agranulocytosis, a severe and potentially fatal blood disorder (hematologic reaction). This reaction is non-dose-dependent and can occur at any time, including after the medication is stopped. Regulatory documents emphasize the importance of immediate discontinuation if symptoms of reduced white blood cell count (such as fever, chills, sore throat, or mucosal lesions) occur.

Other serious adverse events documented include:

  • Hypersensitivity Reactions: Severe anaphylactic shock, anaphylaxis, and angioedema (swelling), which can be life-threatening.
  • Skin Reactions: Rare but severe dermatological conditions such as Stevens-Johnson syndrome (SJS) and Toxic Epidermal Necrolysis (TEN).
  • Hepatobiliary Disorders: Documented cases of drug-induced acute hepatitis and acute liver failure, which may lead to liver transplant in some instances. The frequency of severe liver injury is often categorized as "not known" due to its rare and idiosyncratic nature.

General Safety Considerations

Classification Adverse Reaction Examples Notes on Risk
Rare Agranulocytosis, Anaphylactic shock, Liver failure, SJS/TEN Requires immediate cessation of treatment.
Common Nausea, vomiting, headache, rash, hypotension (low blood pressure) Less severe; hypotension risk is higher after injection and in patients with unstable circulation.
Population-Specific Increased risk of hypersensitivity in patients with asthma, chronic urticaria, or known intolerance to other NSAIDs. Contraindicated in patients with impaired bone marrow function.

Safety Restrictions and Limitations

Use is formally restricted in patients with a history of hypersensitivity to metamizole or other pyrazolone derivatives. Caution is required for patients with pre-existing low blood pressure, volume depletion, or compromised renal or hepatic function, as these conditions may increase the risk of specific adverse effects. The onset of agranulocytosis is often sudden, reinforcing the regulatory requirement for heightened patient awareness.

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Overdose and Emergency Response

Overdose is considered a medical emergency, and government regulatory documentation mandates that immediate medical attention must be sought if a dose higher than prescribed has been taken. The potential for severe, life-threatening outcomes requires urgent action.

Documented Overdose Manifestations

Field Official Regulatory Statement
Documented presentations Clinical signs may include nausea, vomiting, dizziness, tinnitus, and in severe cases, seizures and coma. Manifestations of atropine-like intoxication from the spasmolytic component may also occur.
Systems affected Central Nervous System (CNS), Gastrointestinal tract, Cardiovascular system (hypotension, shock), Renal (acute failure), Hepatic (acute failure), and Hematological (myelotoxicity/agranulocytosis).

Required Emergency Actions

No specific antidote is known for Metamizole toxicity. Treatment is symptomatic and supportive. Regulatory guidance recommends measures to limit absorption such as gastric lavage or administration of activated charcoal if ingestion occurred within the first hour. Furthermore, procedures to accelerate excretion, such as haemodialysis, are advised for severe poisoning. Hospital monitoring is required to manage severe symptoms and detect the potential delayed onset of acute organ failure, particularly hepatic failure, which can manifest several days post-ingestion.

Overdose with this product is classified as having the potential for severe and life-threatening outcomes, underscoring the necessity to seek immediate medical help upon suspected over-ingestion.

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Therapeutic Uses of Реналган

The primary therapeutic use of this medicine is used for managing symptomatic relief from painful conditions where smooth muscle spasms are the root cause of the discomfort. It is commonly used across domains where additional symptomatic support is needed when symptoms intensify and short-term symptomatic assistance is required. A key component in this combination product is considered relevant in contexts marked by increased discomfort or tension, such as severe pain and muscle spasm.

It is considered relevant in conditions involving episodic or fluctuating manifestations, such as symptomatic discomfort in renal (kidney) colic, biliary (gallbladder) colic, intestinal colic, and painful menstruation (dysmenorrhea). In these situations, the primary benefit contributes to easing the overall symptom load. “It is relevant in clinical settings that involve acute or unstable symptom patterns, contributing to improved day-to-day comfort.”

Relief from Colic and Spastic Pain

This medicine is applied in conditions characterized by periods of heightened symptoms, relevant for easing the pronounced cramping pain symptoms linked to the digestive tract. It is applied in addressing the pronounced, painful manifestations associated with muscle spasms, and supports patients during episodes of heightened discomfort and assists with maintaining functional stability.


Quick Fact: Relief for Symptoms Related to Spasms

Regulatory References

  1. European Medicines Agency (EMA) review on Metamizole
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Eligibility and Restrictions for Use

The official regulatory profile for Реналган defines specific populations who are prohibited from use based on the risks associated with its components. Use is absolutely contraindicated in patients with a history of agranulocytosis or other serious hematopoietic system disorders, as well as known hypersensitivity to Metamizole or other pyrazolone derivatives. Due to its anticholinergic properties, the medicine must also not be used by patients with pre-existing conditions such as gastro-intestinal obstruction, megacolon, or paralytic ileus.

Age-related restrictions mandate that the fixed combination is contraindicated in children and adolescents under 15 years of age and infants under 3 months. Concerning reproductive status, the medicine is absolutely contraindicated during the third trimester of pregnancy and not recommended during lactation; a 48-hour period of milk discarding is specified following a single dose. Furthermore, use requires caution and consideration in patients with mild to moderate renal or hepatic impairment and in older adults, where potential changes in metabolism warrant specific monitoring.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

This section describes the officially documented interaction patterns for Реналган (Sodium Metamizole, Pitofenone, Fenpiverinium Bromide), as established in regulatory documents.


Pharmacokinetic Interactions (Enzyme Induction)

The main active metabolite of Metamizole is documented as a moderate to strong inducer of CYP2B6, CYP3A4, and CYP2C19. This effect causes a substantial reduction in the plasma concentrations of various co-administered drugs that are substrates for these enzymes, potentially leading to decreased efficacy. Medicines affected include immunosuppressants like Cyclosporine and Tacrolimus, as well as other agents such as Bupropion, Efavirenz, and Sertraline.

Pharmacodynamic Interactions and Restrictions

Interaction Type Interacting Substance / Product Class Outcome / Restriction
High-Risk Combination Methotrexate and Myelotoxic products Co-administration is strongly restricted due to risk of agranulocytosis.
Antagonism Low-dose Acetylsalicylic acid (Aspirin) Reduction of antiplatelet effect. Timing rule: Aspirin should be taken 30 minutes prior to Metamizole.
Additive Risk Phenothiazine derivatives (e.g., Chlorpromazine) Increased risk of hypothermia.
Additive Effect Other Anticholinergic Substances Potentiation of the spasmolytic effects.
Substance Restriction Alcohol Avoidance is advised during treatment.

Interaction classifications are structured around Metamizole’s role as an enzyme inducer and specific documented high-risk combinations.

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Mechanism of Action

How Реналган Works

Реналган's mechanism is defined by the coordinated action of its three components, engaging distinct biological targets to influence mechanisms resulting in smooth muscle decontraction and pain pathway modulation.


Modulation of Central Nociceptive Signaling Pathways

This mechanism targets the central nervous system via Sodium Metamizole. It acts as an inhibitor of COX enzymes, predominantly the central COX-3 isoform, which limits the synthesis of central signaling mediators (PGE2) within the spinal cord and brain. The mechanism is further supported by the modulation of endogenous opioid/cannabinoid systems to reinforce descending pain inhibition. This results in the modulation of nociceptive signal transmission.


Neurogenic and Myotropic Spasmolytic Mechanisms

This domain involves two components that provide complementary smooth muscle decontraction in visceral tissue. Fenpiverinium Bromide employs a neurogenic mechanism by competitively blocking muscarinic cholinergic receptors, thereby suppressing the nerve signals that initiate muscle contraction. Simultaneously, Pitofenone exerts a myotropic mechanism by directly affecting the muscle cell’s ability to mobilize intracellular calcium (Ca^2+), which is essential for contraction. This dual mechanism influences the regulation of smooth muscle tone.


Synergistic Physiological Mechanism

The central physiological mechanism is defined by the synergy between the analgesic and spasmolytic domains. The spasmolytic mechanisms influence the smooth muscle hypercontractility, while Metamizole's central action alters nociceptive signal transmission. This combined multi-target approach influences regulatory pathways associated with muscle contractility and nociception.

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Dosage and Administration Information

The administration of Реналган is structured by its two primary labeled forms: oral tablets and a solution for intramuscular (IM) injection. As a fixed-dose combination, it is designated for short-term use, with treatment courses generally not exceeding three days. The product's usage is defined by its specific route, frequency, and dose limits.

Administration Routes and Dosing

The standard adult single dose for the tablet form is 1 to 2 tablets, taken 2 to 3 times daily. The maximum daily dose for both the oral and injectable forms is established at 6 units (3000 mg of the Metamizole component). For the solution, a single IM dose is typically 2 to 5 ml and may be repeated after 6 to 8 hours. Oral tablets are instructed to be taken by mouth with water after eating.

Procedural Conditions and Adjustments

The injectable solution is labeled for intramuscular administration only, and its use requires administration under strict medical control within a prepared clinical environment. Population-specific instructions mandate dose modifications: for patients with mild to moderate renal or hepatic impairment, the adult dose is reduced by one-half. Dose adjustments are similarly advised for older adults who exhibit age-related decline in kidney or liver function. The tablets are scored, allowing them to be divided when a precise half-dose is required.

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Recent Clinical Evidence

Research evidence / Overview of studies for Реналган

The research base for this medicine, which combines an analgesic component (Sodium Metamizole) with two spasmolytic components, includes studies conducted in research settings involving acute pain associated with smooth muscle spasms. This research explored how symptoms are measured and how they change during short episodes of heightened discomfort.

Evidence for Use in Renal Colic

Research exploring the use of the key analgesic component in the context of kidney stone pain, or renal colic, has been conducted through short-term Randomized Controlled Trials (RCTs) and subsequent systematic reviews.

Researchers studied populations that typically included adult patients presenting with symptoms of acute pain. The outcomes monitored included the measurement of pain intensity reduction using standardized scales (such as the Visual Analogue Scale, or VAS) at short intervals, along with tracking the patient's need for additional pain medication (rescue analgesia). Studies monitored changes in measured pain intensity. Research has investigated the addition of spasmolytic agents to the analgesic component; however, some trials described patterns where the inclusion of spasmolytics was not associated with a different measured primary outcome compared to the analgesic component administered alone.

Evidence for Use in Biliary Colic

The research context for acute pain associated with gallbladder spasms (biliary colic) was evaluated in clinical trials, where studies monitored responses over defined time intervals. Research in this area examined outcomes related to physical discomfort and acute changes in symptom severity. The study populations included adult patients with acute symptoms related to biliary colic.

Long-Term Studies and Follow-Up

Research scenarios for this medicine focus primarily on acute interventions, meaning the follow-up durations were limited. Long-term outcomes are not well characterized because the primary endpoints in trials were typically measured over short durations, often hours or a few days, aligning with the sudden nature of the symptoms it addresses. The current evidence base for the specific combination product offers limited information for long-term outcomes.

Research Gaps and What Remains Uncertain

The research describes that the evidence base for the specific fixed-dose combination product is subject to several limitations. Trial heterogeneity exists across studies, and some comparative evidence for the three-component fixed formula is lacking. Additionally, the evidence contributes to understanding symptom patterns but does not determine whether an individual will respond similarly. Findings describe group patterns, not personal outcomes, and evidence highlights what is known—and what is still uncertain—about this specific triple combination product.

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Frequently Asked Questions (FAQ)

Common questions about Реналган (FAQ)


Q: Are there any common foods or drinks that should be avoided when taking Реналган?

Official product information explicitly advises the avoidance of alcohol during treatment. Beyond this, regulatory documents do not list specific warnings regarding common foods or non-alcoholic beverages that must be avoided. The tablets are generally instructed to be taken by mouth with water after eating.


Q: Can elderly patients use Реналган safely?

Official guidance indicates that use in the elderly requires caution due to age-related changes that may affect the body's ability to eliminate the medicine. Regulatory documents indicate that due to kinetic changes, a dose reduction should be considered by the prescribing professional.


Q: What are the signs of a serious allergic reaction to Реналган?

Serious reactions like anaphylaxis (severe allergic reaction) can be signaled by a sudden widespread rash, itching, swelling of the throat or tongue, or difficulty breathing. The signs of the rare blood disorder agranulocytosis include unexplained fever, chills, severe sore throat, or painful lesions on mucous membranes (mouth or genitals).


Q: Are there different strengths or formulations of Реналган available?

The medicine is supplied in two forms: oral tablets and a sterile solution for injection. The active ingredient, Metamizole, is available in various strengths depending on the formulation. This may include different single doses, such as 575 mg or 1,000 mg doses in oral forms.


Q: What is the difference between the injectable form and the tablet form of Реналган?

Tablets are for short-term oral use and the effect is typically expected within 30 to 60 minutes. The injectable solution is reserved for clinical settings when a rapid effect is desired and may act slightly faster (around 30 minutes). The injectable form also carries a documented higher risk of severe hypotension (low blood pressure) if administered too quickly.


Q: Can Реналган be crushed or split before taking?

Regulatory documentation confirms that the tablets are scored and may be divided in half when a partial dose is required according to professional instruction. However, the official package information does not contain explicit instructions permitting the tablet to be crushed.


Q: What is the reason Реналган might not be suitable for people with certain heart conditions?

Official documents indicate that this medicine may cause a drop in blood pressure (hypotension). For this reason, caution is required for people with pre-existing low blood pressure or unstable circulation. Rare cases of chest pain and arrhythmia (irregular heartbeat) have also been reported.


Q: How quickly does Реналган typically start to work?

Studies indicate that for oral tablets, a noticeable effect is generally expected to begin within 30 to 60 minutes. For the injectable solution, an effect can be expected around 30 minutes after administration.


Q: How long does the effect of Реналган last after taking it?

According to pharmacokinetic data available in official documents, the pain-relieving effect of a single dose of the medicine typically lasts for 4 to 6 hours.


Q: If I miss a dose of Реналган, what is generally recommended?

Official guidance usually states that if a dose is missed, a double dose should not be taken. Instead, the missed dose is typically skipped, and the patient resumes with the next scheduled dose at the usual time.


Q: What is the risk of dependence or addiction with Реналган?

The medicine is classified as a non-opioid analgesic. Official documentation does not typically associate it with dependence or addiction risk when it is used short-term as directed for acute pain.


Q: Is Реналган available without a prescription in some places?

The regulatory status of the active components varies significantly by country and region. In some territories, the medicine may be available Over the Counter (OTC), while in others, it is strictly Prescription Only.


Q: Are there any documented drug interactions with common antibiotics?

The official safety warning notes a caution regarding its use with antibiotics. If this medicine is taken at the same time as an antibiotic, the antibiotic may mask the initial symptoms (like fever) of the rare but serious blood disorder, agranulocytosis.


Q: Where can I find the official patient leaflet (package insert) for Реналган?

The official patient information (Package Leaflet or Summary of Product Characteristics) can be found on the websites of the national or regional health authorities that regulate the medicine in the relevant territory.


Q: Can Реналган be taken with over-the-counter pain relievers like paracetamol?

Official interaction documents focus on drugs affected by Metamizole's enzyme induction. Paracetamol (acetaminophen) is not listed as one of the specific high-risk interactions requiring avoidance or dose adjustment in these regulatory documents.


Q: What regulatory body approved Реналган for use?

The medicine is approved for use by the national health authority of the country where it is marketed. This is the government body (or a regional body like the EMA) responsible for regulating drugs in that specific territory.


Q: Does Реналган interact with contraceptives?

Yes, regulatory documents indicate that the medicine can reduce the effectiveness of hormonal contraceptives (such as birth control pills) by inducing metabolizing enzymes. Official documentation indicates that concurrent use may require the patient to consider alternative or additional contraceptive methods.


Q: Is it normal to feel thirsty after taking Реналган?

Thirst is not listed among the commonly reported or serious adverse effects of the medicine in official regulatory documentation. Only effects such as nausea, vomiting, headache, rash, and hypotension are classified as common.


Q: What should be done if I suspect an overdose of Реналган?

Official safety guidelines state that suspected overdose requires immediate contact with emergency medical services or a poison control center, regardless of the presence of severe symptoms.


Q: Are there any warnings about using Реналган before surgery?

There is a specific warning regarding its interaction with low-dose Aspirin (acetylsalicylic acid), which is often used to prevent clotting. Since Metamizole can reduce Aspirin's antiplatelet effect, regulatory guidance recommends that Aspirin be taken at least 30 minutes prior to the Metamizole dose.

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How should Реналган be stored and disposed of?

How to Store and Dispose of Реналган

The storage conditions for Реналган (containing Metamizole, Pitofenone, and Fenpiverinium Bromide) are clearly defined in official regulatory documents to ensure product stability.

Storage Requirements

Condition Requirement
Temperature Store at a temperature not exceeding 25 C
Protection Protect from light (especially the solution for injection)
Container Store in the original packaging
Child Safety Keep out of the sight and reach of children

Stability and Disposal

Under these specified conditions, the product maintains a documented 2-year shelf life. Handling instructions specify the medicine should not be frozen. Disposal of any expired or unused Реналган must be carried out in accordance with local requirements. This regulatory instruction directs users to follow pharmaceutical take-back programs or authorized household disposal procedures.

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

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