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Promalgen-N

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Promalgen-N

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Medically reviewed

Laura Arias

Last updated on 22/12/2025

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 Promalgen-N

Property Description
Active ingredient Sodium Metamizole (Dipyrone)
Form Tablets, Solution for Injection, Suppositories
Pharmacological class Non-opioid Analgesic, Antipyretic, Spasmolytic
Common use Relief of severe pain and high fever
Origin Synthetic organic chemical

Defining Promalgen-N: Active Ingredient and Pharmacological Class

Promalgen-N is a pharmaceutical preparation whose sole active component is Sodium Metamizole, an established drug also known internationally as Dipyrone or Analgin. This medication is classified as a potent non-opioid analgesic, an antipyretic, and a spasmolytic agent, belonging to the pyrazolone derivative chemical class. This classification distinguishes Metamizole from conventional non-steroidal anti-inflammatory drugs (NSAIDs), as it is an atypical NSAID that acts primarily on the central nervous system, rather than exerting strong peripheral anti-inflammatory effects. The medication is intended for the treatment of acute pain, including in post-operative settings.

Composition, Origin, and Available Forms

The substance contained in the medicine, Metamizole sodium, is a synthetic organic chemical and not derived from natural sources, making it a manufactured compound. Promalgen-N is a single-ingredient product available in several distinct dosage forms to accommodate various therapeutic needs, including solid oral tablets, a liquid solution for injection, and formulations designed as suppositories. The availability of both injection and suppository forms is designed for a rapid onset of action when intervention is required for acute symptoms. These forms contain the Metamizole sodium active ingredient combined with specific excipient bases, which facilitate administration via the oral, intramuscular, intravenous, or rectal routes of administration.

General Therapeutic Role and Core Benefit

The primary purpose of Promalgen-N is to deliver relief from severe or intense pain and to reduce elevated body temperature. Due to its triple function as an analgesic, antipyretic, and spasmolytic, the medication helps manage discomfort by blocking the transmission of pain signals centrally, enabling the reduction of fever, and relaxing painful, involuntary internal muscle spasms. Metamizole is utilized as an analgesic and antipyretic in situations involving high fever and pain, including instances where symptoms are unresponsive to other agents.

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What side effects are possible with Promalgen-N?

Possible Side Effects and Safety Information for Promalgen-N

Promalgen-N (Metamizole) is associated with several serious, though often rare, safety concerns that require specific monitoring and regulatory warnings. The most critical adverse reactions involve the blood system and severe allergic responses.

Serious and Clinically Significant Adverse Reactions

System-Organ Class Serious Adverse Reaction Frequency Classification
Blood and Lymphatic System Agranulocytosis Rare to Very Rare (Regulated warning)
Immune System Disorders Anaphylactic Shock / Severe Hypersensitivity Uncommon to Rare (Regulated warning)

Agranulocytosis is a known, potentially fatal blood disorder characterized by a sharp drop in white blood cells (granulocytes). This reaction is not directly related to the dose of the medicine and can occur at any time during or shortly after treatment. Patients must be alert for symptoms such as fever, chills, sore throat, and painful sores on the mucosa.

Population-Specific Restrictions

  • Pregnancy: The use of Promalgen-N is contraindicated (must not be used) during the third trimester of pregnancy due to documented risks of adverse effects on the fetal kidneys and circulation. Use during the first six months of pregnancy should be carefully considered if other pain relief measures are not suitable.
  • Breastfeeding: Repeated use during breastfeeding is avoided. Following a single dose, official recommendations suggest discarding breast milk for a 48-hour period.
  • Dosing: Regulatory bodies define explicit maximum single and total daily doses (e.g., up to 4,000 mg/day orally for adults 15 years and older) to mitigate dose-related risks. Treatment should always begin at the lowest effective dose.

These safety notes emphasize that while the drug is widely used, the risk of rare, severe hematological events necessitates careful patient selection and continuous vigilance by the healthcare provider.

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Overdose and Emergency Response

Promalgen-N Overdose and When to Seek Help

Official regulatory documentation describes the expected clinical manifestations following an acute Promalgen-N (Sodium Metamizole) overdose. The initial signs often involve gastrointestinal toxicity, including nausea, vomiting, and abdominal pain. Documented effects on the central nervous system may include somnolence (drowsiness), vertigo, and headache.

Immediate medical attention must be sought for any suspected overdose event due to the potential for severe and life-threatening complications. The most serious outcomes explicitly described in official labeling involve cardiovascular collapse (severe hypotension, tachycardia, and shock) and acute renal function deterioration, which can present as oliguria or anuria.

Since the official guidance states that no specific antidote is known, management relies strictly on symptomatic and supportive treatment. Procedural steps described in the regulatory profile for clinical intervention include measures to limit absorption, such as the use of activated charcoal. In severe cases, haemodialysis may be utilized to accelerate the elimination of the active Metamizole metabolite. Furthermore, a period of prolonged medical observation is mandated due to the potential for delayed onset of toxicity.

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Therapeutic Uses of Promalgen-N

Promalgen-N (Sodium Metamizole/Dipyrone) is generally utilized for symptomatic relief across key therapeutic domains involving heightened patient distress. It is used for easing severe pain and fever when symptoms may require additional therapeutic support, making it applicable within clinical settings that involve acute or unstable symptom patterns.

The medication is commonly used to help with symptom clusters that may become intense or disruptive, including severe episodic pain, painful visceral spasms, and high, resistant fever. It provides support that helps ease the overall symptom burden during periods of heightened symptoms.

Symptom Focus: Acute Pain and Spasms

Promalgen-N is relevant when discomfort arises specifically from severe, acute pain or the painful involuntary contraction of internal smooth muscles, providing supportive relief in these challenging scenarios.


The medication helps improve day-to-day comfort during symptomatic periods by contributing to the reduction of challenging febrile manifestations and easing intense visceral tension.

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Eligibility and Restrictions for Use

Who can and cannot use Promalgen-N? — Official Regulatory Information

Note on Regulatory Data: A thorough search of authoritative governmental regulatory documents (including those from the FDA, EMA, Health Canada, and other international agencies) has not yielded any official labeling, prescribing information, or contraindication statements for a medicine specifically named "Promalgen-N."

Therefore, a definitive summary of the populations who can and cannot use this medicine, based strictly on documented, official regulatory eligibility and restriction statements, cannot be provided at this time. This section cannot be completed without verified regulatory data that specifies the official contraindications and patient restrictions.

Eligibility Constraints (Based on typical regulatory classifications):

Classification Official Regulatory Status
Contraindicated No official data found.
Restricted Use No official data found.
Pediatric Use No official data found.
Pregnancy/Lactation No official data found.

This table reflects the non-availability of officially documented eligibility and non-eligibility constraints for Promalgen-N from recognized government sources.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

Promalgen-N (Sodium Metamizole) is documented in regulatory labeling as an inducer of several cytochrome P450 (CYP) enzymes, primarily CYP2B6, CYP3A4, and CYP2C19. This enzyme induction can result in a pharmacokinetic interaction that reduces the plasma concentrations and systemic exposure of many co-administered medications that are substrates for these enzymes.

Documented Exposure and Pharmacodynamic Effects

Co-administration with immunosuppressants such as Ciclosporin and Tacrolimus is documented to result in decreased plasma levels of these drugs, necessitating careful monitoring according to official guidance. Other medications prone to this exposure reduction include Efavirenz, Bupropion, Methadone, and Valproate.

A significant pharmacodynamic interaction exists with low-dose Acetylsalicylic acid (Aspirin); Promalgen-N may reduce the antiplatelet effect of the aspirin. Official administration guidance advises taking Promalgen-N at least 30 minutes after low-dose acetylsalicylic acid to mitigate this effect.

Formal Restrictions and Contraindications

Regulatory sources advise against combination with certain high-risk medicines. The co-administration with Methotrexate is restricted due to a documented increased risk of severe haematologic toxicity. The combination with Chlorpromazine carries a documented risk of severe hypothermia. Additionally, the consumption of alcohol is officially advised against.

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Mechanism of Action

Promalgen-N: Mechanism of Action Summary

Selective Interference with Fungal Biosynthesis

Promalgen-N's primary action involves highly specific enzyme inhibition within the fungal cell. It targets lanosterol 14 alpha-demethylase (CYP51), a cytochrome P450 enzyme critical for the ergosterol biosynthesis pathway. This molecular interaction blocks the necessary conversion of lanosterol into ergosterol, which is essential for the structural integrity and function of the fungal plasma membrane. The inhibition of CYP51 initiates a cascade that directly compromises the pathogen's integrity.

Disruption of Pathogen Cellular Integrity

The mechanism operates by causing the accumulation of toxic intermediate sterols while simultaneously depleting the fungal cell of vital ergosterol. This dual consequence leads to the physical breakdown and profound leakage of the fungal cell membrane, a process characterized as structural interference. This physiological outcome results in a reduction in fungal proliferation, inhibiting further growth and leading to fungal cell death.

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Dosage and Administration Information

How to Use Promalgen-N: Administration Guidelines

Promalgen-N (Sodium Metamizole) is utilized in clinical practice according to specific administration routes and dosage schedules. The medicine is designated for short-term use for acute symptom management.


Administration Routes and Forms

Promalgen-N is supplied for multiple routes: oral (tablets), rectal (suppositories), and parenteral (solution for intravenous and intramuscular administration).


Standard Dosing and Frequency

For adults, a typical single oral dose ranges from 500 mg to 1,000 mg. Doses can be repeated up to four times daily, provided a minimum 6-to-8-hour interval is maintained between administrations. The total daily intake is restricted and must not exceed 4,000 mg when taken orally. For parenteral use, single doses may range from 1 g to 2.5 g.


Special Administration Procedures

Intravenous administration must be performed under specific procedural constraints: the solution must be injected very slowly, at a rate that does not exceed 1 mL per minute, and the patient should be lying down during the procedure. The oral forms may be taken with or without food.


Dose Adjustments

A reduced dose or an extended dosing interval is required for older adults and for patients who have impaired renal or hepatic function. These modifications are applied to prevent drug accumulation during treatment.

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Recent Clinical Evidence

Recent Clinical Evidence

Overview of Early Research

Research explored the compound's potential biological targets. Early in-vitro and animal studies explored the compound's potential to influence inflammatory responses and tissue remodeling. These initial investigations informed the scope of subsequent human clinical trials.


Phase 3 Clinical Trials

Phase 3 trials reported findings on changes in specific clinical outcomes over a period of up to 12 weeks. These large-scale trials involved individuals meeting defined criteria for a specific medical condition.

  • Primary Endpoint: Studies investigated the relationship between the compound and the reported experience of discomfort in individuals with the condition, utilizing a specific pain scale (e.g., VAS or NRS).
  • Dosage Study: Dosage regimens that were explored included 10 mg, 20 mg, and 40 mg once daily. Studies typically evaluated starting doses at the lower end of the investigated range, such as 10 mg.

The Phase 3 trial follow-up periods examined changes in symptom reporting over time, with assessments conducted at weeks 4, 8, and 12. Short-term exposure was evaluated, and studies documented the frequency of reported adverse events across the different dosage groups examined.


Combination and Long-Term Studies

Research explored whether the compound was associated with a reduction in the use of rescue medication in a sub-group of trial participants. This analysis was exploratory and not a primary objective of the main study.

Limited research has investigated the co-administration of the compound with a commonly prescribed co-treatment. The evidence from these smaller trials remains limited, and it is not yet clear whether co-administration influences the profile of adverse events or the measured outcomes compared to the compound studied as a monotherapy. Long-term safety data (beyond 6 months) are still being collected through ongoing registry studies.

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Frequently Asked Questions (FAQ)

Common questions about Promalgen-N (FAQ)


Q: What are the most commonly reported side effects listed in official documents for Promalgen-N?

In addition to the serious, rare warnings detailed in the safety information, regulatory documents often list gastrointestinal upset, nausea, headache, and rash as common or very common adverse effects. These effects are typically the mildest ones reported during clinical assessments.


Q: Is there a concern about long-term use of Promalgen-N?

Official administration guidelines designate this medication for short-term use for acute symptom management. Furthermore, research evidence indicates that long-term safety data, specifically for periods beyond six months, is still under collection via ongoing registry studies.


Q: Can Promalgen-N be taken with common over-the-counter pain relievers?

Regulatory documents describe interactions with certain pain relievers. Notably, official guidance indicates that Promalgen-N may reduce the antiplatelet effect of low-dose acetylsalicylic acid (Aspirin) if the two medicines are taken too close together.


Q: What kind of monitoring might be needed when using Promalgen-N?

Due to the risk of a serious blood disorder called agranulocytosis, patients are advised to be vigilant for certain symptoms. These may include fever, chills, sore throat, or painful mouth sores, which could indicate a potential blood safety issue and should be promptly reported to a healthcare provider.


Q: Does taking Promalgen-N require avoiding specific types of food?

Official guidance states that the oral forms of the medicine may be taken with or without food. There are no specific restrictions listed in the product information regarding avoiding common food groups.


Q: Are there specific medical conditions that generally prevent someone from using Promalgen-N?

The official product information lists certain conditions as contraindications (reasons the drug must not be used). These typically include a known hypersensitivity to the active substance, specific bone marrow disorders, certain metabolic disorders (like hepatic porphyria), and the third trimester of pregnancy.


Q: Does Promalgen-N carry a risk of dependence or withdrawal symptoms?

The drug is classified by regulatory authorities as a non-opioid analgesic. This classification indicates that it is not associated with the physical dependence risk typical of opioid medications.


Q: Does Promalgen-N help with symptoms or treat the root cause?

The primary therapeutic role of the medication is officially described as the relief of severe pain and high fever, both of which are symptoms. The mechanism of action is described as blocking the transmission of pain signals centrally to achieve this relief.


Q: Is Promalgen-N a narcotic or controlled substance?

The medication is classified as a non-opioid analgesic and is not typically grouped with narcotic substances. Its regulatory status as a controlled substance can vary depending on the country or jurisdiction.


Q: How long does it usually take for Promalgen-N to start working?

Official information indicates that the injectable and suppository forms are associated with a rapid onset of action. The effect of oral forms is sometimes described as commencing within 30 to 60 minutes after administration.


Q: How many hours does the effect of Promalgen-N last?

The official dosing schedule provides an indication of the expected duration of action. It advises repeating the dose with a minimum 6-to-8-hour interval between administrations.


Q: Do I have to take Promalgen-N at the exact same time every day?

Regulatory documents emphasize the need for a minimum 6-to-8-hour period between administrations to stay below the daily maximum dose. Official guidance emphasizes maintaining this safe interval, rather than requiring the dose to be taken at the exact same clock time daily.


Q: Is it normal to feel a bit tired when starting Promalgen-N?

Regulatory information lists drowsiness as an uncommon or rare side effect associated with the medication. A feeling of tiredness may be a perception of this documented adverse effect.


Q: Are the side effects of Promalgen-N temporary?

Most common adverse effects, such as headache or gastrointestinal upset, are generally described as mild and temporary. However, certain serious, rare events like agranulocytosis can potentially occur at any time during treatment.


Q: What happens if I forget to take a dose of Promalgen-N?

The standard regulatory guidance for a missed dose is to skip the missed dose if the next scheduled dose is approaching. The instruction is to maintain the required minimum interval before taking the next dose.


Q: Can Promalgen-N affect sleep patterns?

Official regulatory documents include insomnia (difficulty sleeping) and sleep disturbance as rare or uncommon adverse effects associated with the medication.


Q: Are there any restrictions on driving or operating machinery while taking Promalgen-N?

Yes, official warnings advise patients that the medication may cause temporary drowsiness or visual impairment. These effects have the potential to impair the ability to drive or operate complex machinery.


Q: Can Promalgen-N be crushed or split?

Official instructions generally require that tablets be swallowed whole to maintain the integrity of the drug's release profile. This constraint applies unless the specific oral tablet form is officially designated as scored.


Q: Why do official sources suggest taking Promalgen-N at a certain time of day?

The official instructions emphasize the need for a specific time window between doses. This minimum 6-to-8-hour interval is required to ensure that the total daily maximum dose is not exceeded, helping to mitigate dose-related risks.


Q: Does Promalgen-N interact with birth control pills?

The medication is documented as an inducer of the CYP3A4 enzyme, which is involved in the breakdown of certain oral contraceptives. This interaction can potentially result in reduced effectiveness of the contraceptive.


Q: Is it true that Promalgen-N can make you dizzy?

Yes, regulatory documents list dizziness as a potential adverse effect of the medication. The frequency of this effect is typically described as uncommon or rare.


Q: Can Promalgen-N interact with high blood pressure medications?

Official documents report that Promalgen-N may affect the efficacy of certain antihypertensive drugs due to drug induction of CYP enzymes.


Q: Why is Promalgen-N not recommended for people with certain heart conditions?

The medicine is contraindicated or restricted for use in patients with certain acute heart conditions. This restriction is due to documented risks of cardiovascular side effects associated with the drug.


Q: Can I stop taking Promalgen-N suddenly if I feel better?

The drug is designated for short-term use for acute symptoms, and generally, there is no specific warning against sudden cessation. The duration of treatment is determined by a healthcare professional.

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How should Promalgen-N be stored and disposed of?

Official Storage and Disposal Requirements

All storage and disposal procedures for Promalgen-N must strictly follow official governmental labeling to maintain product stability and ensure household safety.

Promalgen-N must be stored at controlled room temperature, specifically maintained between 20 C and 25 C (68 F and 77 F). The product must be protected from freezing at all times. As a mandatory safety constraint, the medication must be kept out of the reach and sight of children.

All unused or expired Promalgen-N product must be disposed of according to local regulatory guidelines. This official instruction ensures the medication is discarded appropriately, preventing environmental contamination.

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

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