Espasmo Antalgina

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Espasmo Antalgina

Method of action: Antiparkinsonian

Treatment option:

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 Espasmo Antalgina

Property Description
Active Ingredients Hyoscine Butylbromide, Sodium Metamizole
Form Coated Tablets, Solution for Injection
Pharmacological Class Antispasmodic-Analgesic
Primary Action Smooth muscle relaxation and pain relief
Origin Synthetic Derivatives

Defining the Dual-Action Combination

Espasmo Antalgina is a fixed-dose combination product categorized as an Antispasmodic-Analgesic agent, formulated specifically to address the acute discomfort that arises when pain is coupled with involuntary smooth muscle spasm. The medicine combines two distinct, chemically synthesized active substances, pairing a dedicated compound for muscle relaxation (spasmolysis) with a potent non-opioid analgesic to alleviate pain perception. This dual approach provides a targeted therapeutic intervention, positioning the drug as an efficient solution where both pain and spasm are primary sources of distress.


Composition and Forms: Hyoscine Butylbromide and Sodium Metamizole

This medication is based on two synthetic active ingredients: Hyoscine Butylbromide and Sodium Metamizole (also known as Dipyrone). Hyoscine Butylbromide functions as a spasmolytic by acting on peripheral nerve receptors, while Sodium Metamizole, identified as a pyrazolone derivative, contributes the pain-relieving and fever-reducing properties. Sodium Metamizole possesses strong analgesic properties and is clinically recognized for treating intense pain.

Espasmo Antalgina is typically marketed in contexts like Latin American and European regions, utilizing the coated tablet for convenience and the solution for injection for rapid effects in acute settings. This presentation differs from single-ingredient analgesics, establishing its differentiation as a specialized compound for visceral pain scenarios.


What is the Primary Benefit of Espasmo Antalgina?

Its overarching purpose is the rapid and comprehensive relief of acute pain linked to smooth muscle spasm. The core benefit of this synthetic combination lies in its synergistic effect: the Hyoscine Butylbromide acts to promote smooth muscle relaxation, while the Sodium Metamizole reduces the intensity of the pain signals. This combined action addresses both the cause (spasm) and the resulting symptom (pain) simultaneously. The spasmolytic component, Hyoscine Butylbromide, is recognized as a functional treatment for acute conditions involving smooth muscle spasm.

Regulatory References

  1. WHO Essential Medicines

What side effects are possible with Espasmo Antalgina?

Possible Side Effects and Safety Information

The official safety profile for the fixed-dose combination of Hyoscine Butylbromide and Sodium Metamizole is categorized according to established regulatory standards. The adverse reactions are classified based on frequency and the physiological system affected, as documented in government prescribing information.


Documented Adverse Reactions

The most significant safety classifications relate to two main areas:

  • Blood and Immune System: The Sodium Metamizole component is associated with the very rare risk of agranulocytosis (a severe decrease in white blood cells) and other blood dyscrasias. Life-threatening anaphylactic shock and severe cutaneous adverse reactions (such as Stevens-Johnson Syndrome) are also documented under Immune System Disorders and Skin Disorders.
  • Anticholinergic Effects: The Hyoscine Butylbromide component contributes effects listed as common or uncommon, affecting multiple systems. These include tachycardia (increased heart rate), dry mouth, accommodation disorders (visual disturbance), and urinary retention.

Safety Considerations and Constraints

The regulatory safety structure includes constraints for specific populations and pre-existing conditions:

  • Population Specificity: Caution is advised in individuals with pre-existing impaired renal or hepatic function. The spasmolytic component requires caution in patients with conditions predisposing to urinary retention, such as prostatic hypertrophy or narrow-angle glaucoma.
  • Exposure Pattern: Official regulatory notes state that the risk of agranulocytosis can occur at any time during treatment and is not necessarily related to dose.
  • Limitations: The medicine is contraindicated in patients with known hypersensitivity to pyrazolone derivatives or pre-existing bone marrow suppression.

These official safety domains structure the understanding of the medicine’s risk, separating the rare, severe idiosyncratic risks from the more common, system-specific effects.

Overdose and Emergency Response

Overdose and When to Seek Help

Espasmo Antalgina (containing Metamizole/Dipyrone) overdose information is based on official regulatory documentation and emphasizes immediate medical assessment due to the potential for serious complications.

Documented Overdose Manifestations

Acute ingestion may lead to symptoms involving several physiological systems:

System Affected Manifestations (as documented)
Gastrointestinal Nausea, vomiting, and severe abdominal pain.
Cardiovascular Hypotension (low blood pressure) and circulatory shock.
Neurological Somnolence, dizziness, and vertigo.
Renal Acute renal insufficiency or failure.

Required Emergency Actions

Immediate medical attention must be sought upon the suspicion of overdose. Because no specific antidote exists for Metamizole/Dipyrone, management is strictly supportive and symptomatic. Medical professionals may initiate procedures like gastric decontamination if the ingestion occurred within the first hour.

Patients must also seek urgent medical help immediately if any signs of potentially fatal blood disorders, such as agranulocytosis, appear (e.g., unexplained fever, sore throat, or mucosal changes), as these conditions require immediate intervention regardless of the dose consumed. Hospital monitoring and observation of vital signs and laboratory parameters are necessary to manage potential severe outcomes, including acute liver or kidney failure.

Therapeutic Uses of Espasmo Antalgina

What Espasmo Antalgina Treats: Main Uses and Benefits

This combination is commonly used to help with symptoms related to physical discomfort caused by the involuntary muscle contractions. It is applied across therapeutic domains like the gastrointestinal, biliary, and genitourinary tracts. It is relevant for easing symptoms associated with acute or disruptive episodes, such as intestinal colic, painful stomach cramps, renal colic (kidney stones), and dysmenorrhoea (menstrual cramps). The antispasmodic component helps relieve discomfort caused by spasms in the stomach, intestines, kidney, and bladder.

The medication may assist with easing symptoms that interfere with daily comfort during phases when symptoms become more noticeable, providing supportive relief when symptoms interfere with routine activities. It is also used for managing fever that may accompany the acute spasmodic pain, contributing to easing the overall symptom load.

“The combination is considered relevant in contexts marked by increased discomfort or tension where the symptoms are linked to heightened physiological activity.”


Quick Fact: Relief for Visceral Spasm and Severe Colicky Pain


Eligibility and Restrictions for Use

Eligibility and Contraindicated Populations

The eligibility profile for Espasmo Antalgina is defined by absolute prohibitions and restrictions established in official regulatory documents. Use is strictly contraindicated for patients with a known hypersensitivity to Hyoscine Butylbromide, Sodium Metamizole, or other pyrazolone compounds.

Absolute Non-Eligibility: The medicine must not be used by individuals with certain serious pre-existing conditions, including myasthenia gravis, untreated narrow-angle glaucoma, and disorders of the haematopoietic system, such as a history of agranulocytosis. It is also prohibited in cases of mechanical stenosis in the gastrointestinal or genitourinary tracts, paralytic ileus, and megacolon.

Age and Reproductive Stage Restrictions: The drug is contraindicated in infants below three months or five kilograms of body weight. For adults, use is restricted by reproductive stage: it is contraindicated during the third trimester of pregnancy and is generally not recommended during the first two trimesters or while breastfeeding (milk must be discarded for a regulatory period following use). The standard fixed-dose formulation is typically not recommended for children under 15 years.

Conditional Use: Caution is required for patients with severe renal or hepatic impairment, and those susceptible to tachyarrhythmia or urinary outlet obstructions.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This medication, a fixed combination of Hyoscine Butylbromide and Sodium Metamizole, has formally documented interaction patterns primarily concerning its two active ingredients. The profile includes combinations that are prohibited, interactions that modify exposure levels, and those resulting in additive pharmacodynamic effects.

Official Interaction Statements

  • Co-administration with anticholinergic agents, including tri- and tetracyclic antidepressants and antihistamines, leads to the officially documented intensification of the anticholinergic effect.
  • The Metamizole component is a documented enzyme inducer, causing a reduction in the plasma concentration and systemic exposure of co-administered sensitive CYP substrates such as Cyclosporine, Methadone, and Valproic acid.
  • The use of Glucocorticoids alongside this medicine increases the documented risk of gastro-intestinal bleeding.
  • The diuretic effect of Furosemide is officially stated as attenuated when co-administered.
  • Co-administration with Neuroleptics, particularly Phenothiazine derivatives, is officially noted to carry a risk of severe hypothermia.
  • The antiplatelet effect of low-dose Acetylsalicylic acid is documented as being inhibited when the drugs are taken simultaneously.

Regulatory Restrictions

Classification Restriction and Context
Contraindicated Co-administration with anticoagulant drugs is prohibited when administered via the intramuscular injection route due to the risk of intramuscular haematoma.

Mechanism of Action

The physiological effects of Espasmo Antalgina result from the combined action of its two components on distinct regulatory systems. The spasmolytic component, Hyoscine Butylbromide, acts as a competitive antagonist at peripheral Muscarinic Acetylcholine Receptors ( M1, M2, M3) located on visceral smooth muscle. This blockade prevents acetylcholine binding and interrupts the signal cascade that typically mobilizes Ca^2+ ions, resulting in a reduction of muscle tone and smooth muscle relaxation. Concurrently, the analgesic component, Sodium Metamizole (via its metabolites), modulates nociceptive signaling primarily within the central nervous system. This is achieved through the inhibition of COX enzymes, hypothesized to involve COX-3, and the engagement of inhibitory pathways such as the Cannabinoid Receptor Type 1 ( CB1). The metabolites elevate the central threshold for pain perception and modulate the intensity of nociceptive signals. This dual-level action engages both the motor component (contraction) and the sensory component (perception) of the signal-contraction cycle.

Dosage and Administration Information

Espasmo Antalgina is a fixed-dose combination product containing the antispasmodic Pituifenone and the analgesic Metamizole (also known as Dipyrone). Since the regulatory details for the specific combination product may vary by country, the general administration guidelines for the key active component, Metamizole, provide the foundation for correct usage.

Metamizole Component (Basis for Use)

Administration Scope General Guidelines
Route of Administration Typically available for oral use (tablet/solution) and injection.
Standard Adult Oral Dose Maximum single dose: 1,000 mg. Maximum daily dose: 4,000 mg (4 doses/day).
Age-Specific Use Standard adult dosing applies to patients 15 years of age and older. Doses for younger patients must be calculated based on body weight.
Dose Timing Treatment should begin at the lowest recommended dose and should only be increased if necessary. Doses should be spaced out to not exceed the maximum daily limit.

Procedural Structure

The administration of Espasmo Antalgina must strictly follow the dosing parameters established by the relevant national drug authority.

  • Verification: Confirm the exact formulation (e.g., tablet strength, concentration) and the recommended age/weight group before administration.
  • Dosing: Measure or count the lowest effective single dose, ensuring the total amount does not exceed the maximum daily limit (e.g., 4,000 mg of Metamizole component for adults).
  • Timing: Administer doses with appropriate time spacing to maintain therapeutic effect without surpassing the maximum allowable frequency or amount.
  • Adjustments: Dose adjustments for pediatric patients must be strictly calculated according to body weight to prevent potential toxicity.

This medicine should only be used as directed by a healthcare professional and solely for the duration prescribed. These instructions reflect the regulatory constraints on safe dosage and administration and do not address the clinical reasons for its use.

Recent Clinical Evidence

Espasmo Antalgina: Recent Clinical Evidence

This section provides an overview of clinical research concerning the combination of Dipyrone (Metamizole) and Hyoscine Butylbromide (N-Butylscopolamine), the two active components of this formulation. This information summarizes research findings and is not a recommendation for use or a substitute for medical advice.


Combination Studies and Therapeutic Focus

Clinical trials focusing on the combination of Dipyrone and Hyoscine Butylbromide primarily evaluate their effects on acute visceral pain, which is pain originating from internal organs. The research aims to assess the simultaneous activity of the two components:

  • Dipyrone (Analgesic): Investigated for its potent pain-relieving and fever-reducing properties, particularly in moderate-to-severe pain, including pain related to injury, surgery, or colic. Studies suggest its mechanism of action involves inhibiting central nervous system pathways, distinct from traditional NSAIDs.
  • Hyoscine Butylbromide (Antispasmodic): Research evaluates its use in relaxing the smooth muscles of the gastrointestinal, biliary, and urinary tracts. This action is explored for its potential role in managing cramping or spasms associated with visceral pain.

Key Research Areas

Research Focus Primary Outcome Evaluated
Efficacy Reduction in pain intensity (often measured using the Visual Analog Scale or Numeric Pain Rating Scale) and the degree of spasm relief.
Tolerability Assessment of the incidence and severity of observed side effects in patient populations treated with the combination.
Comparative Trials Studies compare the combined formulation's effects to a placebo or, in some cases, to the individual components alone, generally focusing on speed of relief and overall effect on pain scores.

Safety Consideration in Research

It is important to note that studies on Dipyrone must account for the well-documented, rare but serious risk of agranulocytosis (a severe reduction in white blood cells). Consequently, research often focuses on risk-benefit profiles and rigorous patient monitoring, particularly in populations where the drug is still legally available.

Frequently Asked Questions (FAQ)

Common questions about Espasmo Antalgina (FAQ)


Q: How quickly does Espasmo Antalgina typically start working after taking it?

A: Official regulatory documents indicate that the pain-relieving effect of the medicine usually begins to act about 30 minutes after taking it orally. Official documents indicate the product is formulated for the relief of pain associated with smooth muscle spasm.


Q: What is the expected duration of the effects of Espasmo Antalgina?

A: According to the official product information, the pain-relieving effect is generally expected to last between four to six hours. This duration is based on regulatory information regarding the elimination of the analgesic component.


Q: Is Espasmo Antalgina used for stomach cramps or other types of pain?

A: The fixed combination is specifically indicated for the relief of acute pain linked to spasms. While the Metamizole component is known for treating moderate to severe pain, the combination is primarily indicated for pain related to involuntary smooth muscle movement, such as spasms.


Q: What kind of spasms is Espasmo Antalgina primarily intended to address?

A: Official documents state the medicine is primarily indicated for spasms affecting the smooth muscles of internal organs, including the gastrointestinal, biliary (gallbladder), and urinary tracts.


Q: Can Espasmo Antalgina be used for headaches or only for cramps?

A: The combination product is primarily indicated for acute pain associated with smooth muscle spasm, such as cramping. While the pain-relieving ingredient, Metamizole, may be used for various types of moderate pain, this specific fixed combination’s indication focuses on spasm-associated visceral pain.


Q: What is the role of the antispasmodic component in the medicine?

A: The antispasmodic component, Hyoscine Butylbromide, is included to promote relaxation of the smooth muscles of internal organs. By relieving the spasm, its role is to promote relaxation, which helps relieve the resulting pain.


Q: What is the difference in effect if Espasmo Antalgina is taken with food versus without?

A: Official regulatory data suggests that taking the medication with food may slightly delay the onset of the pain-relieving effect. While the active ingredients are generally absorbed when taken orally, consumption with food may influence the speed at which the medication begins working.


Q: Is there a known interaction between Espasmo Antalgina and alcohol?

A: Official regulatory labeling cautions against or prohibits the consumption of alcohol when using Metamizole products. This is advised due to the possibility of an acute reaction, such as facial flushing and nausea, and the documented potential for enhanced effects of alcohol.


Q: Is there any information available on its use during pregnancy (descriptive only)?

A: Official drug documents state the medicine is strictly contraindicated (prohibited) during the third trimester of pregnancy. Use during the first two trimesters is generally not recommended or used only after a risk-benefit assessment as described in regulatory documentation.


Q: Are there any specific details about its use in pediatric patients?

A: Regulatory documents state the medicine is contraindicated for infants under three months or five kilograms of body weight. The standard fixed-dose formulation is typically not recommended for children under 15 years; dosing for younger patients is referenced in regulatory documents as requiring calculation based on body weight.


Q: Does taking Espasmo Antalgina affect blood pressure?

A: Official documentation lists hypotension (low blood pressure) and tachycardia (increased heart rate) as possible adverse effects. These effects are documented in the official safety profile, particularly following injection but also with oral use.


Q: What does the available clinical evidence show about its primary use?

A: The overall body of research summarized in official documents indicates that the primary function of this combination is the rapid and comprehensive relief of acute visceral pain coupled with involuntary smooth muscle spasm. Studies evaluate both the pain reduction and the degree of spasm relief.


Q: Can this medication affect a person's alertness or focus?

A: Official guidance advises caution because the product may cause effects such as dizziness and accommodation disorders (visual disturbances). Regulatory guidance advises caution because these effects may impair attention, which can affect the ability to drive or operate machinery.


Q: Is it common for people to experience sleep disturbances while taking it?

A: While not explicitly listed as 'sleep disturbances,' official safety information includes somnolence (drowsiness) and other effects related to the central nervous system. These documented effects may indirectly influence a person's sleep patterns.


Q: Why do some people experience a color change in urine after taking this medicine?

A: Regulatory documents state that a harmless red coloration of the urine can occur. This is not due to blood, but is a documented and expected effect caused by a metabolite (breakdown product) of the Sodium Metamizole component.


Q: Are there any reported interactions with over-the-counter cold and flu medicines?

A: The official product information warns against using the medicine with other anticholinergic agents, which are often found in certain over-the-counter cold and flu preparations. This combination can intensify the side effects of the antispasmodic component.


Q: Can Espasmo Antalgina affect the results of laboratory tests?

A: Yes, official documentation states that the medicine can potentially interfere with certain common laboratory tests. These tests include those that measure creatinine, triglycerides, cholesterol, and uric acid concentrations.


Q: Is Espasmo Antalgina typically available over-the-counter in certain regions?

A: The regulatory status of the key ingredient, Metamizole, varies widely across the globe. It is banned or restricted in several countries (like the US and UK) but is available for purchase without a prescription in many others, including regions of Latin America and Europe.


Q: Do any official drug labels discuss dependency concerns with Espasmo Antalgina?

A: Official regulatory documents indicate that the Metamizole component is classified as a non-narcotic analgesic. The active components do not have the central nervous system activity that is typically associated with abuse or dependence.


Q: Is Espasmo Antalgina sometimes used for gallbladder or kidney stone pain?

A: Yes, the medicine is officially indicated for the relief of pain associated with biliary colic (pain from the gallbladder) and renal colic (pain related to kidney stones). This reflects its intended use for acute, spasm-related visceral pain.


Q: Is there a maximum recommended duration of use described in the package insert?

A: Regulatory notes emphasize that treatment should generally be as short as possible and should not involve prolonged use. This recommendation is related to the need to minimize the potential for rare but serious adverse reactions associated with the Metamizole component.


Q: What does the regulatory information mention about storage temperature?

A: Official documents define specific storage requirements. The tablet form is required to be stored below 25 C. Additionally, the solution for injection must not be refrigerated or frozen.


Q: How does the paracetamol component (if present) compare to a standalone paracetamol drug?

A: This medicine does not contain Paracetamol (Acetaminophen). It is a combination of Hyoscine Butylbromide and Sodium Metamizole (Dipyrone). Metamizole is a chemically distinct analgesic and should not be mistaken for Paracetamol.


Q: Why does the drug name use the term 'Espasmo'?

A: The term 'Espasmo' is a direct reference to the function of one of the active ingredients, the antispasmodic component (Hyoscine Butylbromide). This ingredient is included in the fixed combination to specifically treat involuntary smooth muscle spasms.

How should Espasmo Antalgina be stored and disposed of?

Storage and Disposal Requirements

Official regulatory documents define mandatory conditions for the storage, protection, and disposal of this medicine.

Storage Category Requirement
Temperature Constraint Store below 25 C. Do not refrigerate or freeze the solution for injection.
Child Safety Keep out of the sight and reach of children to prevent accidental ingestion.
In-Use Stability The solution for injection has a shelf life of 28 days after the immediate container is first opened.
Disposal Mandate Unused or expired product must be disposed of in accordance with local regulations. Avoid releasing the medicine to the environment or throwing it into wastewater.

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

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