Adalgin

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Adalgin

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Medically reviewed

Marina Burgos

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.

Overview of Adalgin

What is Adalgin? Defining the Drug's Identity

Property Description
Active ingredient Metamizole sodium
Form Tablet, injectable solution
Pharmacological class Pyrazolone derivative (Non-Opioid Analgesic)
Common use Relief of moderate to severe pain and high fever
Origin Synthetic chemical compound

Adalgin is a brand name for a medication whose active substance is Metamizole sodium. It is principally utilized for its effects as an analgesic (pain reliever) and antipyretic (fever reducer). Metamizole is a synthetic compound classified as a pyrazolone derivative, a group of non-opioid pain relievers distinct from common NSAIDs. Its primary function is to offer robust relief from significant pain and to effectively lower dangerously high body temperatures.

What is Adalgin Made of, and What Forms Does it Come In?

Adalgin is typically manufactured as a single-ingredient product, containing only Metamizole sodium as the active component. It is commonly supplied as tablets for oral use and in sterile solutions for injection (parenteral administration), allowing for flexible routes of administration. This medication is clinically recognized for its fast onset of action when administered parenterally, making the injectable form a common choice in clinical settings for rapid intervention. The drug is typically available by prescription (Rx status) in many regions where it is registered.

What Is the General Purpose of Adalgin?

The general role of Adalgin is to serve as a reliable and powerful option for the management of acute pain and fever. Its strong pharmacological action means it is often employed when common over-the-counter analgesic drugs have proven insufficient. Metamizole is recognized for its efficacy as an antipyretic agent, supporting its use for quickly and effectively reducing fever. This makes the medicine highly valuable for swiftly stabilizing patients experiencing significantly elevated body temperatures.

What side effects are possible with Adalgin?

Possible Side Effects and Safety Information

The safety profile of Adalgin ( Metamizole sodium) is primarily defined by the risk of rare, serious adverse reactions documented in official regulatory sources, notably those affecting the blood system and immune response. The most serious concern is agranulocytosis, a severe and potentially life-threatening reduction in a type of white blood cell, which can occur at any time during or shortly after treatment and is not necessarily related to the dose.

System-Organ Classifications and Frequency

Adverse reactions are classified by the physiological system affected:

  • Blood and Lymphatic System Disorders: Includes rare, serious events such as agranulocytosis and other blood dyscrasias.
  • Immune System and Skin Disorders: The rare risks include severe hypersensitivity reactions like anaphylactic shock and serious skin conditions such as Stevens-Johnson syndrome and Toxic Epidermal Necrolysis.
  • Hepatobiliary Disorders: Cases of rare, acute liver injury and acute liver failure have been reported.
  • Vascular and Cardiac Disorders: Includes documented reports of hypotension and shock, particularly associated with intravenous administration.
  • Common Effects: General adverse reactions classified as common in regulatory sources include nausea, vomiting, abdominal pain, headache, and somnolence.

Regulatory Safety Restrictions

Specific constraints are applied to certain patient populations and clinical contexts. Adalgin is officially contraindicated for use during the third trimester of pregnancy due to potential risks to the fetus. It is also contraindicated in infants below three months of age or under five kilograms of body weight. Furthermore, the medication must not be used in individuals with pre-existing impaired blood cell formation or a history of agranulocytosis caused by Metamizole or similar substances.

Overdose and Emergency Response

Overdose and When to Seek Help

This information describes the documented manifestations of overdose for Adalgin ( Metamizole sodium) and the required emergency actions, as stated in regulatory prescribing information.

Documented Overdose Manifestations

System Affected Officially Documented Symptoms and Outcomes
Central Nervous System (CNS) Somnolence, vertigo, convulsions, or coma in severe cases.
Cardiovascular/Renal Severe hypotension (critical low blood pressure), circulatory collapse, and acute renal impairment (kidney damage).

Emergency Actions Mandated by Regulators

In the event of overexposure, seek immediate medical attention.

Overdose management is symptomatic and supportive. Regulatory documents confirm that no specific antidote is available for Metamizole sodium intoxication. Treatment procedures may include gastric lavage or activated charcoal to reduce absorption, and continuous monitoring of vital functions is required.

Urgent medical help must also be sought immediately if signs of a life-threatening complication, such as agranulocytosis, appear. These symptoms include persistent fever, sore throat, or painful lesions on the mucous membranes. For vulnerable populations, such as the elderly or those with reduced creatinine clearance, the elimination of the drug’s metabolic products is noted to be prolonged, which may increase the risk following overexposure.

Therapeutic Uses of Adalgin

Adalgin (Metamizole sodium) is considered relevant for symptomatic relief within therapeutic areas involving moderate to severe pain and significantly elevated body temperatures. The medication is applied across domains where additional symptomatic support is needed, which may include application for discomfort following surgery, symptoms related to tumor pain, and episodes of high fever.

The medication is commonly used in conditions that present with intense symptoms linked to internal tension, such as renal colic (kidney stones) or biliary colic. It helps address symptom clusters that may become intense or disruptive, contributing to easing the overall symptom load.

“This application is common in clinical scenarios such as managing postoperative pain after surgery or helping to ease symptoms following an acute injury.”

The medication plays a role in managing symptoms related to significantly elevated body temperatures that create noticeable physiological strain. It offers symptomatic relief that may assist with maintaining functional stability when symptoms are more noticeable, especially during acute or episodic manifestations such as migraine attacks or severe low back pain.


Quick Fact: Relief for Spasm-Related Pain


Regulatory References

  1. European Medicines Agency

Eligibility and Restrictions for Use

The eligibility profile for products marketed under the brand name Adalgin is determined by the specific active ingredient(s) approved by government regulatory authorities in each country. Where Adalgin contains metamizole (dipyrone), official regulatory documents establish strict contraindications for specific populations.

Official Eligibility Constraints (Metamizole-Based Products)

Eligibility Status Excluded Populations
Contraindicated Patients with known hypersensitivity to metamizole, pyrazolones, or other ingredients.
Individuals with impaired bone marrow function or specific blood disorders (e.g., agranulocytosis history).
Third trimester (last 3 months) of pregnancy.
Not Recommended Breastfeeding mothers (due to drug excretion in milk).
Infants and young children below the officially defined minimum age or weight.
Restricted Use Patients with severe hepatic or renal impairment, requiring special consideration.

These constraints define who is legally non-eligible to use the medicine based on documented risks found in government-approved prescribing information (SmPC/Prescribing Information). Use is generally allowed only for patients outside of these excluded groups who meet the minimum age criteria and do not present with a documented risk of serious hematological events.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Adalgin ( Metamizole sodium) has documented interaction patterns that are primarily classified as pharmacokinetic, affecting the body's processing of co-administered drugs. Regulatory information indicates that Metamizole acts as a moderate to strong inducer of key metabolic enzymes, including CYP3A4, CYP2B6, and CYP2C19. This enzymatic induction typically leads to a substantial decrease in the plasma concentrations and systemic exposure of medicines metabolized by these pathways, such as Cyclosporine, Midazolam, Bupropion, and certain other agents.

Metamizole also carries a documented pharmacodynamic interaction profile. Co-administration with low-dose Acetylsalicylic acid (Aspirin) functionally antagonizes Aspirin’s anti-platelet effect. To manage this specific interaction, a timing rule is noted in regulatory documents: low-dose Aspirin must be administered at least 30 minutes before Adalgin.

Further, caution is required when co-administering with other myelosuppressive agents, as this combination carries a documented, additive risk of agranulocytosis. The elimination of the active metabolite ( 4-MAA) is officially noted as delayed in specific populations, including patients with chronic liver disease and acute renal failure, which can alter the drug's overall metabolic and interaction profile.

Mechanism of Action

Adalgin's Mechanism of Action: How It Works

Dual-Action Prostaglandin Blockade

Adalgin's primary biological targets are the Cyclooxygenase (COX) enzymes (COX-1 and COX-2) and specific Prostaglandin E2 ( PGE2) receptors (EP2 and EP4). The drug initiates its effect by functioning as a non-selective inhibitor of COX enzymes, which blocks the synthesis of PGE2 from Arachidonic Acid. Concurrently, it acts as a competitive antagonist at the EP2/EP4 receptors, blocking PGE2's ability to activate cellular signaling.


Mechanistic Cascade and Physiological Adjustments

This dual molecular action results in a reduction of the PGE2-mediated signaling cascade. This leads to the reduction of the second messenger, cyclic AMP (cAMP), within key cells involved in signal transmission. This modulation occurs both peripherally and centrally. The resulting altered cellular signaling modulates nociceptive and inflammatory pathways, and limits PGE2 action in the hypothalamus, thereby influencing the physiological mechanisms governing core body temperature and nociceptor sensitization.

Dosage and Administration Information

The administration of Adalgin (Metamizole sodium) is guided by strict regulatory instructions detailing the approved routes, maximum dose thresholds, and specific use conditions. The medicine is officially available for oral intake (via tablets, capsules, or drops) and parenteral administration through intravenous (IV) or intramuscular (IM) injection, as well as rectal use.

For adults, the single oral dose is typically up to 1,000 mg, with a strict limit of 4,000 mg as the maximum daily intake. Doses must be separated by a time interval of 6–8 hours. Parenteral administration (IV or IM) has a higher daily limit, reaching up to 5,000 mg.

Official instructions emphasize specific procedural constraints for injectable forms. Intravenous injection must be administered very slowly to control the infusion rate, and solutions requiring dilution (such as with saline or glucose) must be administered immediately after preparation. Dosing for pediatric patients is strictly calculated based on body weight. Furthermore, a dose reduction is mandated for older or debilitated patients due to the drug’s prolonged elimination time, and high daily doses should be avoided in those with hepatic or renal impairment. Overall, the medicine is primarily intended for short-term use, with specific time constraints for certain conditions.

Recent Clinical Evidence

Research evidence / Overview of studies for Adalgin

Evidence for Use in Acute Pain and Postoperative Management

Research exploring Adalgin in the context of acute pain primarily consists of short-term, placebo-controlled Randomized Controlled Trials (RCTs) and comprehensive meta-analyses that consolidate findings from many studies. This evidence was gathered in research conducted during periods of increased symptom activity, particularly in adults experiencing outcomes related to physical discomfort following various procedures. The primary research examined outcomes such as changes in pain intensity scores (e.g., VAS/NRS) and the frequency of rescue analgesic use over short, defined time intervals. Studies reported measurements of pain score changes observed in the studied populations.

Evidence for Use in Spasm-Related Pain (Colic)

Research examined the role of Adalgin in conditions associated with acute or disruptive episodes, specifically pain linked to internal spasms, such as renal or biliary colic. Researchers examined outcomes describing episodic or acute changes by measuring how rapidly patient-reported outcomes describing perceived discomfort evolved. Research limitations include that the research is highly focused on the immediate, acute presentation of the condition. Follow-up durations were limited.

Evidence for Use in Elevated Body Temperature (Fever)

Research evaluated the use of Adalgin in the context of outcomes related to systemic or functional imbalance, specifically significantly elevated body temperature. Studies monitored physiological strain by measuring the decrease in body temperature at specific short time points. While data for short-term antipyresis, particularly in children, is substantial, evidence quality varies between studies. Data for certain groups, such as non-critically ill adults, are less characterized.

Evidence in Special Populations

Research has explored the use of Adalgin in distinct population groups. One area with substantial evidence outside general adult acute pain is in children, where it was studied for fever management. Observational research has monitored use in older adults, primarily through studies that examine patient-reported outcomes describing perceived discomfort. Data for certain groups remain insufficient; for instance, there is limited information from high-quality RCTs concerning outcomes in patients with severely impaired kidney or liver function.

Long-Term Evidence and Research Gaps

A key finding across the evidence landscape is the limited information for long-term outcomes. The majority of published, high-quality RCTs are designed to examine short-term or episodic symptom patterns, with follow-up durations that were limited to a maximum of two weeks. Research exploring long-term effectiveness, durability of response, or maintenance of symptom control over periods of months or years is generally absent. There are ongoing research efforts, such as new RCTs, exploring its potential use in conditions like low back pain, but these data are still emerging.

Frequently Asked Questions (FAQ)

Common questions about Adalgin (FAQ)


Q: How quickly should I feel Adalgin start working?

A: Pharmacokinetic data is used to describe the expected onset of action for the medicine. The maximum concentration of the drug’s main active metabolite is typically reached in the bloodstream within 30 to 120 minutes following oral administration. A clear analgesic effect is expected between 30 and 60 minutes. This data is used to describe the expected speed of the drug's effect.

Q: How long does the effect of Adalgin usually last?

A: The drug's duration of action is related to its elimination half-life. Official pharmacological documents indicate that the elimination half-life of the main active metabolite in adults ranges from approximately 2.6 to 3.5 hours. This figure is used to estimate the drug's duration of effect before another dose may be considered.

Q: What is the difference between Adalgin and a narcotic painkiller?

A: Adalgin is officially classified as a non-opioid analgesic. It is chemically distinct from narcotic (opioid) pain medications and does not act on the opioid receptors in the body. Furthermore, official regulatory bodies do not list this medication as a controlled substance.

Q: What is the difference between Adalgin and its generic version?

A: Adalgin is a brand name for the active ingredient metamizole sodium. Both the brand name drug and its generic versions contain the same active ingredient at the same strength. Regulatory standards require that generic versions meet criteria for bioequivalence, meaning they must work in the body in the same way as the brand name product.

Q: Is Adalgin the same kind of medicine as aspirin?

A: Official documents classify the active substance, metamizole, as a pyrazolone derivative. This chemical structure makes it pharmacologically distinct from the non-steroidal anti-inflammatory drug (NSAID) class, which includes aspirin. The drug is described as acting through different pathways than traditional NSAIDs.

Q: Is Adalgin a type of anti-inflammatory drug?

A: The medicine is officially classified as an analgesic (painkiller) and antipyretic (fever reducer). While the drug’s mechanism involves modulating pathways related to inflammation, its primary approved function is for pain and fever, and its anti-inflammatory effects are not considered its main clinical use.

Q: Why do doctors prescribe Adalgin instead of other options for pain?

A: The drug is officially indicated for the management of moderate to severe acute pain and significantly high fever. It is utilized for its powerful analgesic and antipyretic effects, often utilized in situations where other common options have proven insufficient or inappropriate. This is based on its documented efficacy in clinical trials.

Q: What is the role of Adalgin in a multi-step treatment plan?

A: Official information indicates the drug is formally designated for the management of pain and fever. It is positioned for use in situations where a strong pharmacological action is required and other treatment options are ineffective or unsuitable. This defines its place in treatment protocols.

Q: Why is Adalgin sometimes mentioned in discussions about nerve pain?

A: The drug's mechanism of action is described as working both centrally and peripherally to modulate the transmission of pain signals. This is achieved by influencing specific nociceptive pathways within the nervous system. This activity is relevant in discussions concerning various types of pain signaling.

Q: Is Adalgin safe for people over the age of 65?

A: Regulatory guidance indicates that a dose reduction may be required for older patients. This is due to a documented prolonged elimination time in this population. Regulatory guidelines advise that high daily doses are to be avoided in older or debilitated patients.

Q: Are there any long-term safety concerns associated with Adalgin use?

A: Regulatory labeling indicates the medicine is primarily intended for short-term use; regulatory guidance often specifies use not exceeding seven days. Prolonged use requires specific medical monitoring, including monitoring of blood counts due to the potential, though rare, risk of agranulocytosis.

Q: Can people with heart conditions take Adalgin?

A: The official prescribing information notes a risk of severe hypotension (low blood pressure) and shock, particularly when administered intravenously. Official labeling notes that special precautions apply to patients with pre-existing circulatory instability or certain heart conditions.

Q: Can people with asthma or lung problems use Adalgin?

A: The drug is officially contraindicated in patients with known intolerance to analgesics that precipitates asthma or angioedema (severe swelling). Official labeling notes that special precautions apply to patients with existing bronchial asthma or chronic respiratory tract infections.

Q: Does taking Adalgin cause high blood pressure?

A: The official list of documented adverse reactions includes reports of hypotension (low blood pressure), especially following rapid administration. However, official information does not list hypertension (high blood pressure) as a common or known side effect.

Q: How do I know if I'm having a serious allergic reaction to Adalgin?

A: Signs of a serious hypersensitivity reaction, such as anaphylaxis, include swelling of the face, throat, or tongue, and difficulty breathing. Serious skin reactions like Stevens-Johnson syndrome may involve widespread blistering or a rapidly spreading rash. These are considered rare but severe adverse events.

Q: Is it okay to drive or operate machinery after taking Adalgin?

A: Official labeling notes that some adverse reactions, such as drowsiness or dizziness, may transiently impair the ability to react. Caution is advised when driving or operating machinery, as the effects can vary among individuals.

Q: Does Adalgin have a risk of addiction or dependence?

A: The active substance is classified as a non-opioid analgesic. It is not listed as a controlled substance by major regulatory authorities. Official documents do not list dependence as a common risk associated with this medication.

Q: Does Adalgin interact with antidepressant medications?

A: Adalgin is a known inducer of certain metabolic enzymes (CYP enzymes) in the liver. This effect can lead to a reduced concentration in the blood of other medicines metabolized by these enzymes, which includes certain types of antidepressant drugs.

Q: Does Adalgin interact with medications for blood pressure?

A: Caution is advised with concomitant use of certain blood pressure medicines, such as Captopril and diuretics. The official documentation indicates that professional medical evaluation is necessary when considering these combinations, due to the potential risk of adverse effects.

Q: Are there any major food or drink restrictions while using Adalgin?

A: Regulatory guidance generally recommends avoiding alcohol consumption while using this medicine. This precaution is advised because alcohol may intensify potential adverse effects of the drug.

Q: Can Adalgin be crushed or split for easier use?

A: Official instructions usually describe the tablets or capsules as intended to be swallowed whole. There is no official regulatory instruction that the oral forms of the medicine can be modified by crushing or splitting.

Q: Can taking Adalgin affect the results of lab tests?

A: Official instructions note that the drug and its metabolites may interfere with certain laboratory tests. These include tests that measure plasma or urine creatinine, uric acid, and blood sugar (glucose). This interference should be considered when interpreting results.

Q: Can I take Adalgin if I have diabetes?

A: Official guidance notes that the drug may interfere with laboratory tests that measure blood sugar (glucose). While the drug is noted to interfere with glucose testing, official information does not provide specific usage guidance for patients with diabetes.

Q: How does my body process and eliminate Adalgin?

A: The drug's active substance is rapidly converted into several active metabolites in the body, primarily 4-methyl-amino-antipyrine (MAA). These active metabolites are then primarily eliminated from the body through excretion in the urine.

Q: What happens if I miss a scheduled time to take Adalgin?

A: Official guidance typically states that if a dose is missed, it should be taken as soon as the patient remembers. However, if it is nearly time for the next scheduled dose, the missed dose should generally be skipped.

Q: What if Adalgin doesn't seem to be working for me after a few days?

A: Official guidance advises that if symptoms or the condition being treated does not improve after 3 to 4 days of use, the medicine should be stopped. If symptoms do not improve after this period, regulatory guidance suggests seeking professional medical guidance.

Q: Is there a maximum time frame for safely using Adalgin?

A: The medicine is intended for short-term use. For fever management, treatment should generally not exceed 3 to 4 days, and use for pain should not exceed seven days without medical supervision. Prolonged use requires specific medical monitoring.

Q: What should I do if I accidentally take more Adalgin than intended?

A: Official documentation states that immediate medical attention should be sought in case of accidental overdose. Management of overdose is clinical in nature and focuses on supportive care and reducing drug absorption.

How should Adalgin be stored and disposed of?

How to Store and Dispose of Adalgin (Metamizole sodium)

The storage and disposal of Adalgin must follow the specific requirements outlined in the official regulatory labeling to ensure product integrity.


Storage Requirements

Condition Regulatory Mandate
Temperature Store below 25 C (Controlled Room Temperature).
Protection Keep the medicine in its original package, protected from light and moisture.
Prohibitions The product must not be refrigerated or frozen.
Safety Keep Adalgin out of the sight and reach of children.

Disposal Instructions

Unused or expired Adalgin must be handled as pharmaceutical waste. Official instructions mandate that the product must not be discarded via wastewater (such as flushing down a toilet or sink). Disposal must be carried out according to local regulations for medicines, typically utilizing established community drug take-back programs or designated collection points.

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

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