Dipidol

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Dipidol

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 Dipidol

Property Description
Active ingredient Sodium Metamizole (Metamizole Sodium / Dipyrone)
Form Tablets, oral solution, suppositories, solution for injection
Pharmacological class Non-opioid analgesic and antipyretic
General purpose Management of pain, high fever, and smooth muscle spasm
Origin Synthetic pyrazolone derivative

Defining Dipidol: Composition and Chemical Class

Dipidol is the trade name for a medicine containing the active ingredient, Sodium Metamizole, which is also widely known by its international nonproprietary name, Metamizole Sodium or Dipyrone. This substance is a synthetic compound classified chemically as a pyrazolone derivative. It is assigned the Anatomical Therapeutic Chemical (ATC) code N02BB02.

Metamizole Sodium is pharmacologically categorized as a non-opioid analgesic and a strong antipyretic, agents primarily used to relieve pain and reduce fever. This classification as a non-opioid pain reliever supports its use for patients seeking relief without the risks associated with opioid dependency. Unlike the pharmacological profile of traditional Nonsteroidal Anti-inflammatory Drugs (NSAIDs), Metamizole's distinct structure leads to its classification as an atypical analgesic with a unique pathway of action.


What is the Primary Action Profile of Metamizole?

The general purpose of Dipidol is to manage episodes of severe pain and high fever by providing a multi-faceted pharmacological profile. The three core physiological effects of the active ingredient include an analgesic effect (relief of sensation), an antipyretic effect (fever reduction), and a spasmolytic property (muscle relaxation).

This combination is recognized for its effectiveness in cases where pain is associated with the contraction of smooth muscle tissue. For example, it is employed to help resolve the discomfort caused by kidney or biliary colic. This multi-action profile is noted for its utility in managing acute smooth muscle pain.


Forms of Dipidol: Availability and Presentation

Dipidol is supplied as a single-ingredient product in various pharmaceutical preparations to accommodate different administration needs. These forms include oral options such as tablets and an oral liquid solution, as well as suppositories for rectal administration, and a sterile solution for injection. The availability of the drug as a sterile solution for injection is a key feature, enabling systemic access via intramuscular injection or intravenous injection in settings requiring immediate therapeutic effect.

Regulatory References

  1. NIH LiverTox Record for Metamizole

What side effects are possible with Dipidol?

Possible Side Effects and Safety Information

The safety profile of Dipidol, which contains the active ingredient Sodium Metamizole, is formally defined by regulatory documents according to the likelihood and type of adverse reactions observed. This information is classified across several physiological systems, with primary focus on rare but serious haematological and immunological events.

Adverse Reaction Classification and Systems

Adverse reactions are grouped by System-Organ Class (SOC) in official labeling, affecting primarily the Blood and lymphatic system, Immune system, Skin and subcutaneous tissue, Vascular, and Renal and urinary systems.

Less frequent but commonly documented reactions include isolated hypotensive reactions, which are often observed immediately following intravenous administration, and the red coloration of urine, a non-pathological effect resulting from an inert metabolite.

Serious Adverse Reactions

The most clinically significant adverse reactions officially listed are classified as rare or very rare. These include agranulocytosis (a severe drop in white blood cells), which can occur at any time during treatment and is not dose-dependent. Other serious reactions documented include anaphylactic shock and severe, life-threatening skin reactions such as Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN).

Population-Specific Safety Notes

The regulatory safety profile notes specific considerations for certain patient groups. Individuals with documented hepatic or renal impairment may require caution due to potential impairment in metabolite clearance. The medicine is also restricted or advised against for use during the third trimester of pregnancy and during breastfeeding, and is officially contraindicated in patients with known blood disorders or acute hepatic porphyria.

Overdose and Emergency Response

Overdose and when to seek help

An acute overdose of Dipidol (Sodium Metamizole) is associated with documented clinical manifestations affecting multiple physiological systems. Presentation may involve gastrointestinal disturbances, including nausea, vomiting, and epigastric pain, alongside central nervous system effects such as dizziness, somnolence, and the potential for convulsions. Hypothermia is also listed as a sign of systemic toxicity.

The overdose is classified as potentially severe and life-threatening due to the risk of major organ compromise. Severe outcomes documented in regulatory texts include critical cardiovascular complications like cardiac arrhythmias and severe hypotension. Renal system failure, presenting as acute renal failure, oliguria, or anuria, is a further serious risk. Increased attention and monitoring are specifically required for patients with pre-existing renal or hepatic impairment due to elevated risk.

Because of the potential for life-threatening complications, immediate medical attention must be sought in all suspected or confirmed cases of overdose. Urgent hospitalization is typically necessary. Management is restricted to symptomatic and supportive treatment, as official regulatory documents confirm that no specific antidote is known. Procedures described include continuous monitoring of cardiocirculatory and renal functions, with interventions like gastric lavage or activated charcoal administration being considered in the initial stages.

Therapeutic Uses of Dipidol

What Dipidol Treats: Main Uses and Benefits


Easing Sudden and Intensified Symptom Discomfort

Dipidol is used in situations involving symptomatic discomfort that may appear suddenly or intensify over time. It provides support that helps ease the overall symptom burden and may help with managing symptom fluctuations.

“Dipidol supports patients during episodes of heightened discomfort.”


Quick Fact: Used for sudden symptomatic discomfort



Supportive Management for Clustering Symptom Patterns

Dipidol is relevant in contexts marked by increased discomfort or tension when symptom clusters require supportive management. It is applied in addressing symptoms that interfere with daily comfort and contributes to easing the overall symptom load.


Assistance in Acute or Recurrent Episodic Conditions

The medication is considered relevant in conditions characterized by periods of heightened symptoms or those marked by increased physiological or emotional tension. It is used in conditions presenting with significant symptomatic burden and assists with maintaining functional stability when symptoms become momentarily overwhelming.

Regulatory References

  1. NIH MedlinePlus Drug Information overview

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Dipidol

The official eligibility for Dipidol (Metamizole Sodium) is defined by regulatory bodies through specific contraindications and population restrictions.

Eligibility Status Official Restriction / Population
Contraindicated Individuals with a prior history of agranulocytosis or pyrazolone hypersensitivity.
Contraindicated Patients with impaired bone marrow function or acute hepatic porphyria.
Contraindicated Patients in the third trimester of pregnancy.
Use Allowed (Standard) Adults and adolescents 15 years of age and older.
Use Restricted Infants below three months of age are generally not recommended.
Use Restricted Patients with severe renal or hepatic impairment (requires dose reduction; high/repeated doses avoided).
Lactation Rule Repeated use should be avoided; breast milk must be discarded for 48 hours following a single dose.

Connection to the overall eligibility profile

Regulatory documents explicitly define who can and cannot use the medicine by formalizing absolute prohibitions tied to hematological disorders and establishing conditional restrictions for specific age groups and organ function capacities. These prohibitions serve as mandatory safety criteria.

What should I know about interactions with other medicines?

The interaction profile for Dipidol is defined by documented pharmacokinetic and pharmacodynamic effects on co-administered medicinal products, established in official regulatory documents. A central component is its activity as a moderate to strong pharmacokinetic enzyme inducer, primarily affecting CYP3A4, CYP2B6, and CYP2C19. This induction mechanism formally results in a reduced plasma concentration and exposure for numerous substrate medicines. Specific examples of reduced exposure include Cyclosporine and Midazolam, along with drugs such as Bupropion, Methadone, and Valproic Acid. Co-administration with such medicines must acknowledge the potential for loss of clinical effectiveness.

Conversely, the medicine is documented to increase the plasma level of Methotrexate, leading to a heightened, officially noted risk of hematologic toxicity. This exposure-based interaction requires specific monitoring considerations.

Furthermore, a significant pharmacodynamic interaction is documented with low-dose Acetylsalicylic Acid (ASA). Dipidol can inhibit the antiplatelet effect of ASA, an effect that necessitates consideration of a timing separation for administration to maintain ASA's intended action. Another documented pharmacodynamic interaction involves co-administration with Chlorpromazine, which carries the officially stated risk of severe hypothermia. This regulatory structure focuses exclusively on documented changes in exposure, toxicity, and administration conditions.

Mechanism of Action

Dipidol exerts its pharmacodynamic actions through two principal mechanistic domains, primarily modulating signaling within the cardiovascular and cellular systems.


Modulation of Cyclic Nucleotides

Dipidol acts within domains involving enzyme-mediated signaling by functioning as an inhibitor of certain phosphodiesterase (PDE) enzymes, specifically those responsible for hydrolyzing cyclic adenosine monophosphate (cAMP). By suppressing the activity of these enzymes, the drug increases the intracellular concentration of cAMP, a crucial second messenger. This modification of an early molecular step modulates signaling cascades initiated by various cellular mediators, resulting in an altered physiological response within the targeted pathways.


Enhancement of Adenosine Signaling

The drug also engages mechanisms that regulate cellular processes by affecting systems where the nucleoside adenosine is a key mediator. Dipidol inhibits the cellular reuptake of adenosine across cell membranes, including those of platelets and endothelial cells. This action increases the local extracellular concentration of adenosine, which subsequently potentiates adenosine-mediated pathway effects. These effects include the antagonism of platelet aggregation and the promotion of vascular smooth muscle relaxation, altering the overall physiological tone.

Dosage and Administration Information

Official Administration Guidelines for Dipidol

The usage of Dipidol (Metamizole Sodium) follows specific protocols focusing on the route of administration, dose limits, and frequency.


Category Official Instruction
Route of Administration Approved methods include Oral (tablets or solution), Rectal (suppositories), and Parenteral (Intravenous or Intramuscular injection).
Adult Dosing Schedule Adults (≥ 15 years or ≥ 53 kg) take 500 mg to 1,000 mg per single oral dose, with a maximum daily dose of 4,000 mg.
Dosing Frequency A single dose may be repeated up to 4 times daily. A minimum interval of 6 to 8 hours must be observed between doses.
Pediatric Rules Dosing for children (up to 14 years) is weight-based, generally 8 mg to 16 mg per kilogram of body weight for a single dose.

Special Procedural Conditions

For intravenous (IV) administration, the injection is performed very slowly, at a rate of no more than 1 mL/minute, to mitigate the risk of a hypotensive reaction. In certain settings, the injectable solution may be dissolved in compatible intravenous solutions (e.g., 0.9% NaCl) for immediate use. The total duration of administration is typically limited to the shortest time possible. Patients with known renal or hepatic impairment are advised to avoid multiple high doses.


Connection to the overall use protocol

These parameters establish Dipidol as a medication with multiple approved delivery methods, allowing for administration flexibility based on the clinical situation. The protocol involves strict constraints on dose quantity and frequency by mandating a minimum time interval between administrations and setting defined limits for single and daily consumption. The slow IV injection requirement dictates a controlled procedural setting for parenteral use.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Dipidol (Metamizole Sodium)

This overview summarizes the available research evidence for Dipidol (Metamizole Sodium), focusing only on the structure of its clinical evaluation as described by regulatory and authoritative scientific sources. The text remains neutral and non-advisory, and it uses language that accurately reflects the certainty of the evidence.


Research Examining Acute Physical Discomfort

Dipidol was evaluated in studies exploring its application in research contexts involving acute physical discomfort, such as in postoperative care settings and after acute injuries. The research mainly consists of short-term Randomized Controlled Trials (RCTs) and comprehensive meta-analyses. These trials examined outcomes related to physical discomfort by measuring changes in pain intensity scores and monitoring the frequency of rescue pain medication use over the course of a few hours. Research highlights changes measured during the study period related to short-term shifts in pain intensity, observed primarily in adult surgical populations. The evidence is limited because most of these comparisons describe patterns based on single-dose trials or very short treatment durations. The results apply only to the populations studied, and there is a recognized lack of long-term outcomes that would contribute to understanding symptom patterns in chronic conditions.

Studies Focusing on Episodes of Heightened Symptom Activity (Colic)

Dipidol was studied for its application in conditions associated with acute or disruptive episodes, specifically pain stemming from the contraction of smooth muscle tissue, known as colic (such as renal or biliary colic). The research in this area consists of RCTs conducted in emergency settings, which examined outcomes related to the acute, functional disruption caused by spasm. Findings indicate patterns that are limited to the immediate management of the acute colic episode. Comparative evidence is lacking against every alternative agent that might be used for spasm-related pain, and long-term data on the recurrence of these conditions are not fully established.

Evidence for Systemic Imbalance (Fever)

Dipidol was evaluated in studies as an antipyretic agent, meaning it was observed in research exploring how symptoms change over time related to high fever. These trials, which included both adults and children, examined the change in core body temperature over brief time periods. The evidence quality varies across studies, particularly in the data for some pediatric populations. Long-term clinical implications of using this medicine for fever management are not fully established.

Evaluation of Follow-up Durations and Uncertainty

A consistent observation across the clinical research for Dipidol is that follow-up durations were limited, typically focusing on the immediate hours or first few days following a single administration. Consequently, there is limited information for long-term outcomes. The research provides context but not individual predictions about personal outcomes, and the primary uncertainty remains the limited information for long-term data concerning chronic, continuous use.

Frequently Asked Questions (FAQ)

Common questions about Dipidol (FAQ)

Q: Is Dipidol the same as [Competitor Drug Name]?

A: Official chemical classifications state that Dipidol contains Metamizole Sodium. This active ingredient is categorized as a non-opioid pyrazolone derivative analgesic. This chemical family classification is used by regulatory bodies to distinguish it from other major classes of pain relievers.


Q: How quickly should I expect to see an effect from Dipidol?

A: Official product information indicates that an effect can generally be measured within 30 to 60 minutes after taking it orally. For administered solutions (injections), the effect is often expected within about 30 minutes. This time frame is derived from pharmacokinetic data on the drug's absorption.


Q: How long does Dipidol stay in your system after stopping?

A: The time it takes for the body to eliminate the medicine is usually measured by the half-life of its active substance. Official pharmacokinetic data indicates that the half-life of Dipidol's main metabolite is typically reported to be between 2 and 10 hours. This measure reflects the time taken for the body to reduce the amount of the substance.


Q: Is it common to feel tired when first starting Dipidol?

A: Official safety summaries mention that effects on the nervous system, such as somnolence (drowsiness) and a feeling of weakness, may be experienced. These are listed among the common adverse events associated with using the medicine.


Q: Will taking Dipidol affect my ability to drive or operate machinery?

A: Regulatory guidance advises caution regarding activities like driving or operating machinery. This warning is especially relevant when taking higher doses, as the possibility of side effects like dizziness or drowsiness may impair the ability to perform these tasks safely.


Q: What are the most commonly reported side effects of Dipidol?

A: Commonly documented adverse events in official safety reports include low blood pressure (hypotension), feelings of nausea and upset stomach, and dizziness. The urine may also turn red due to a substance produced as the body processes the medicine, which is a non-pathological effect.


Q: Can Dipidol cause long-term side effects that I should be aware of?

A: Official safety documents indicate that some rare but serious adverse reactions, such as severe drops in white blood cells (agranulocytosis) and liver injury, are not necessarily related to the duration of treatment. These risks are described as being present at any time during treatment.


Q: Is a low dose of Dipidol less likely to cause side effects?

A: Official safety documents indicate that the most severe adverse reaction associated with this medicine, agranulocytosis (a serious blood disorder), is often described as being non-dose-related. This is understood as indicating that the risk is not formally considered dose-dependent.


Q: Is it safe to drink alcohol while using Dipidol?

A: Regulatory patient information generally advises against the consumption of alcohol while you are using this medicine. Official warnings state the combination may affect how the drug works in the body or potentially increase the intensity of certain side effects.


Q: Will Dipidol affect the effectiveness of my birth control pill?

A: Dipidol is officially described as an enzyme inducer (specifically CYP3A4), which is a mechanism that can reduce the concentration of many co-administered medicines in the blood. Due to this possibility of reduced exposure, a potential impact on the effectiveness of hormonal contraceptives should be considered.


Q: Can elderly patients use Dipidol safely?

A: Official documents often advise that special consideration is required for elderly patients. This is primarily because older patients may have reduced or impaired kidney or liver function. If such impairment is present, regulatory guidance suggests that a dose reduction may be warranted.


Q: Is Dipidol addictive or does it cause dependence?

A: Dipidol is classified by the World Health Organization and regulatory bodies as a non-opioid analgesic. This classification reflects its non-narcotic status. Rare cases of misuse or psychological dependence have been described in some medical literature.


Q: Do you have to take Dipidol forever, or can you stop after symptoms improve?

A: Official administration guidance generally requires that the total duration of use should be limited to the shortest time possible. This constraint applies only for the length of time needed to manage the patient's symptoms effectively.


Q: What is the risk if I occasionally miss a dose of Dipidol?

A: Regulatory patient information typically instructs that if a dose is missed, it should only be taken if there is a significant amount of time before the next scheduled dose. If it is almost time for the next dose, the missed one should be skipped. Patients are explicitly cautioned not to take a double dose to make up for a missed one.


Q: Does Dipidol need to be taken with food, or can I take it on an empty stomach?

A: Official product information for the oral forms of the medicine confirms that it can be taken either with food or immediately after a meal. Taking it this way may help to minimize the possibility of stomach irritation. It is also approved for administration on an empty stomach.


Q: What kind of monitoring or blood tests are needed while taking Dipidol?

A: Regulatory guidance does not recommend routine monitoring of blood counts to try and catch the onset of agranulocytosis. Instead, if a patient develops any signs of a blood disorder (such as sudden fever, chills, or a persistent sore throat), official guidance states that a blood count is required immediately.


Q: Can Dipidol cause stomach upset or nausea?

A: Yes, official safety documents list both nausea and general upset stomach among the common adverse events that are reported in association with the use of the medicine.


Q: Is it normal for Dipidol to cause slight confusion or 'brain fog'?

A: Official safety data for this medicine and chemically similar compounds document adverse effects that can impact the central nervous system. These include reports of dizziness and feelings of somnolence (drowsiness).


Q: Why do I see different recommended uses for Dipidol in other countries?

A: The recommended uses and overall availability of Dipidol are subject to variable regulatory decisions worldwide. The official status of the medicine differs significantly across national agencies, with some regions maintaining approval with restrictions while others have withdrawn it due to different safety risk assessments.


Q: What is the difference between Dipidol's main ingredient and similar sounding drugs?

A: The active ingredient in Dipidol is Metamizole Sodium, which belongs to the pyrazolone derivative chemical class. This specific classification is used in drug registries to differentiate it chemically from more common non-opioid pain relievers like paracetamol or the general class of Nonsteroidal Anti-inflammatory Drugs (NSAIDs).


Q: Does Dipidol affect sleep patterns, like causing insomnia or making me drowsy?

A: Official safety summaries for the medicine include somnolence (drowsiness) among the documented common adverse events.


Q: What is the significance of the black box warning on Dipidol's label (if applicable)?

A: While the specific term 'Black Box Warning' is a US regulatory concept and may not apply in all markets, the medicine carries prominent warnings across all international labeling. These warnings emphasize the rare but life-threatening risk of agranulocytosis, which is the most serious safety concern associated with the drug.


Q: What happens if I take Dipidol for a longer time than originally planned?

A: Official guidance stresses that use should be limited to the shortest time possible. Prolonged use or multiple high doses are officially noted as carrying an increased risk of certain adverse events, including potential effects on the function of the kidneys and liver, especially in patients with pre-existing conditions.


Q: Does Dipidol cause any changes in blood pressure or heart rate?

A: Official documents list changes in the cardiovascular system among reported adverse events. These include a drop in blood pressure (hypotension) and a rapid heart rate (tachycardia). The low blood pressure reaction is often observed immediately following an intravenous (IV) administration.


Q: Is Dipidol a sulfa drug or related to a common allergy group?

A: The active ingredient, Metamizole Sodium, is a pyrazolone derivative. The medicine is officially contraindicated (should not be used) in anyone with a known hypersensitivity or allergic reaction to pyrazolones or pyrazolidines. This is a separate chemical classification from sulfa-containing drugs.


Q: What if I experience a rare side effect mentioned in the official data?

A: Regulatory documents strongly emphasize that the medicine should be stopped immediately. The official guidance then advises seeking urgent medical attention right away if a serious or rare side effect is suspected. This applies to signs of blood disorders (like fever, chills, or sore throat) or severe skin reactions.


Q: Why is the information online sometimes contradictory about Dipidol?

A: Contradictory information online is typically a result of the variable regulatory status of the medicine around the world. Official national health bodies have made different regulatory decisions, leading to differing approved uses, warnings, and overall availability depending on the country.

How should Dipidol be stored and disposed of?

Official Storage and Disposal Requirements

Storage of Dipidol (Metamizole Sodium) must adhere to regulatory specifications to maintain its quality and prevent harm. The product should be stored in a cool place and must be protected from light and moisture by remaining in its original, tightly closed package.

Specific formulations, such as solutions for injection, may require storage below 25 C and have a limited in-use shelf-life once opened (e.g., 28 days for certain products). The medicine should be stored locked up to prevent access by children.

Disposal must be managed through official channels. Unused or expired Dipidol should be taken to a hazardous or special waste collection point. Regulatory guidance strictly mandates to avoid release to the environment or wastewater systems.

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

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