Spasmocin

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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 Spasmocin

What is Spasmocin?

Spasmocin is a medicinal product classified as an antispasmodic agent. It is primarily used to manage and relieve involuntary muscle contractions, commonly known as spasms, occurring in the smooth muscles of the gastrointestinal, biliary, and genitourinary tracts.

Mechanism of Action

The active component in Spasmocin works by relaxing the smooth muscles of the internal organs. Unlike skeletal muscles, which are under voluntary control, smooth muscles operate automatically within the body's systems. When these muscles contract excessively or irregularly, it can result in significant discomfort or cramping. Spasmocin helps to stabilize these muscle movements, thereby easing the associated symptoms.

Therapeutic Applications

Spasmocin is utilized in various clinical scenarios where smooth muscle relaxation is required. Its applications typically include:

  • Gastrointestinal Tract: Relief of spasms associated with the stomach and intestines.
  • Biliary System: Management of contractions within the bile ducts and gallbladder.
  • Genitourinary System: Alleviation of spasms in the urinary tract or during certain gynecological conditions.

Because it targets specific receptors in the smooth muscle tissue, the medication is designed to provide localized relief to the affected organ systems without significantly impacting the rest of the nervous system.

What side effects are possible with Spasmocin?

Possible side effects and safety information

The safety profile of Spasmocin (Hyoscine Butylbromide) is based on the drug's action as a peripheral-acting anticholinergic agent, with adverse reactions categorized by frequency and the body system affected in official regulatory documents.


Frequency-Classified Adverse Reactions

The most frequent adverse reactions are direct manifestations of the anticholinergic properties and are categorized by regulatory authorities as follows:

  • Common: Tachycardia (fast heart rate), accommodation disorders (transient blurred vision), and dry mouth.
  • Uncommon: Skin reactions (e.g., urticaria, pruritus, rash), and abnormal or reduced sweating.
  • Rare: Urinary retention (difficulty passing urine).
  • Not Known: This category includes events whose frequency cannot be estimated from available data, such as decreased blood pressure (hypotension), flushing, and central nervous system effects (confusion, agitation, coma), which are very rarely reported, typically following parenteral administration.

Serious Adverse Reactions and Safety Constraints

Official documents highlight that rare, but serious, adverse reactions have been documented. Anaphylactic shock, including reports with fatal outcomes, has been observed, particularly following the administration by injection. The injection may also be associated with a risk of severe hypotension and serious cardiac events (e.g., cardiac arrest) in patients with pre-existing heart conditions. The drug may also cause an acute elevation of intraocular pressure, which is a concern for patients with undiagnosed narrow-angle glaucoma.


Special Population and Duration Notes

Parenteral use requires particular caution and monitoring for patients with existing cardiac conditions. Regulatory information also notes that older adults may have an increased susceptibility to anticholinergic side effects like urinary retention. Furthermore, the medication should not be taken on a continuous daily basis or for extended periods without medical investigation of the cause of abdominal pain, as stated in the official labeling.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdosage with Spasmocin (Hyoscine Butylbromide) results in an exaggeration of the drug's established peripheral anticholinergic effects. Due to the potential for serious complications, immediate medical attention must be sought upon the appearance of any signs of overdosage.

Documented Manifestations

The officially documented clinical signs of overdosage include tachycardia (fast heart rate), dry mouth, reddening of the skin, urinary retention, and transient visual disturbances. Gastrointestinal effects such as inhibition of motility and slight drowsiness have also been noted. In severe cases, documented life-threatening outcomes include respiratory paralysis and Cheynes-Stokes respiration.

Regulator-Defined Emergency Management

If overdosage is suspected, immediate medical advice and attention must be sought. Regulatory guidance states that the symptoms of overdosage respond to medical interventions with parasympathomimetics. For managing respiratory complications, intubation and artificial respiration should be considered for respiratory paralysis. Procedures for specific complications include catheterisation for urinary retention. For oral poisoning, official management includes gastric lavage with activated charcoal followed by magnesium sulfate. Treatment for cardiovascular complications must follow usual therapeutic principles.

Therapeutic Uses of Spasmocin

What Spasmocin Treats: Main Uses and Benefits

Spasmocin is commonly used to address symptoms related to heightened physiological activity across several internal organ systems. The medication is considered relevant for addressing symptoms within its established indication, which involves symptom relief in the gastrointestinal and genito-urinary tracts, applying supportive management when appropriate.

It is used to manage painful abdominal cramping, acute renal and biliary colic, and the disruptive symptoms associated with Irritable Bowel Syndrome (IBS). The primary symptomatic focus is addressing heightened physical discomfort. The relief offered helps patients cope more steadily with these acute, challenging episodes.

“The primary application of Spasmocin is to help ease severe discomfort associated with heightened physiological activity.”

It is also applicable within clinical settings that involve acute or disruptive symptom patterns, such as prior to certain diagnostic procedures like specialized radiological scans or endoscopy, and for managing severe menstrual cramps (primary dysmenorrhea). This role provides supportive relief when symptoms interfere with routine activities.

Quick Fact: Relief for Acute Pain and Colic

Eligibility and Restrictions for Use

Who can and cannot use Spasmocin?

This section describes the officially documented eligibility rules for using Spasmocin (Hyoscine Butylbromide), based strictly on government regulatory labeling.

Populations Contraindicated (Must Not Use)

Use of this medicine is absolutely contraindicated in patients with the following conditions:

  • Known hypersensitivity to the active substance or excipients.
  • Narrow-angle glaucoma (untreated/undiagnosed).
  • Myasthenia gravis.
  • Mechanical stenosis or paralytic/obstructive ileus (bowel blockage).
  • Megacolon or prostatic hypertrophy with urinary retention.
  • Tachycardia (specifically for the injection formulation).

Age and Physiological Restrictions

Population Group Eligibility Status (Regulatory Wording)
Children under 6 years (Oral) Not recommended for use.
Pregnancy Not recommended due to limited human safety data.
Breastfeeding Not recommended due to insufficient data on excretion into milk.
Cardiac Conditions Use with caution due to the risk of tachycardia.
Renal/Hepatic Impairment Use with caution is advised.

Adults and adolescents over 12 years are considered the standard population for use under labeled conditions. Children aged 6 years and older are generally eligible for the oral tablet form.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Spasmocin (Hyoscine Butylbromide) documents several interaction patterns, which are classified based on their effect on the body and the drug’s administration route.

Documented Interaction Classifications

Interaction Type Interacting Substance Categories Official Interaction Outcome
Pharmacodynamic Reinforcement Other Anticholinergic Drugs (e.g., antidepressants, antihistamines) Intensified anticholinergic effect is documented, requiring caution.
Functional Antagonism Dopamine Antagonists (e.g., Metoclopramide) May result in a diminution of the effects of both drugs on the gastrointestinal tract.
Route-Specific Contraindication Anticoagulant Drugs (e.g., Warfarin) Intramuscular injection is contraindicated due to the documented risk of intramuscular haematoma.

Other Official Interaction Statements

  • The tachycardic effects of Spasmocin may be enhanced when co-administered with beta-adrenergic agents.
  • Antacids or adsorbent antidiarrheals may reduce the oral absorption of the medicine, potentially leading to decreased effectiveness.
  • Alcohol consumption is documented to increase the chance of side effects such as drowsiness.

These restrictions define the constraints on co-administration as required by government health authorities.

Mechanism of Action

Targeting the Cellular Stress Response via ASK1 Inhibition

Spasmocin acts as a selective inhibitor of Apoptosis Signal-regulating Kinase 1 (ASK1), a core enzyme within the cell's stress signaling pathway. This molecular interaction interrupts the initial cascade, preventing the activation of downstream stress kinases, specifically JNK and p38.

Modulating Inflammatory and Pro-Contraction Cascades

By blocking ASK1, Spasmocin limits the downstream transcription of pro-inflammatory genes and reduces the release of related cytokines. This mechanism modulates the cellular stress signaling that affects the processes driving smooth muscle contraction, influencing the signal balance within peripheral pathways.

Attenuating Cellular Signaling Governing Muscle Tone

This core physiological effect is an attenuation of cellular stress and reduced inflammatory signaling at the tissue level, which influences the mechanisms regulating smooth muscle contraction. The targeted modulation influences signals of cellular hyper-reactivity, resulting in downstream physiological adjustments that affect biological signals governing muscle tone.

Dosage and Administration Information

Official Administration Guidelines

Spasmocin (Hyoscine Butylbromide) is administered via multiple official routes, with specific dosing schedules determined by the required speed of action and the pharmaceutical form.


Administration Scope Official Guideline
Route of Administration Oral, Intravenous (IV), Intramuscular (IM), Subcutaneous (SC), and Rectal (Suppositories).
Dosing Schedule (Adults) Oral: 10 mg to 20 mg per dose, up to 4 times daily (Max 80–100 mg daily). Parenteral: Single dose of 20 mg, which may be repeated after 30 minutes, not to exceed a maximum daily dose of 100 mg.
Timing in Relation to Meals Can generally be taken regardless of food intake.
Age-Group Rules Children 6–12 years: The labeled oral dose is typically one 10 mg tablet, 3 times daily. The injectable form is generally not recommended for children.
Course Duration Constraint The medication should not be taken on a continuous daily basis or for extended periods without investigating the underlying cause of the abdominal pain.

Special Procedural Conditions

Administration technique varies by form as specified in labeling. Oral tablets must be swallowed whole with water and must not be broken, crushed, or chewed. For intravenous (IV) administration, the injection must be performed slowly, typically over a period of at least three minutes. Furthermore, the injectable solution should not be given intramuscularly (IM) to patients receiving anticoagulant drugs; in these situations, the IV or SC routes must be utilized instead.

These official instructions establish the precise framework for dosage, maximum limits, and administration method, ensuring the medicine is used according to the standardized procedures outlined in the product specifications.

Recent Clinical Evidence

Spasmocin: Recent Clinical Evidence

Spasmocin (which contains an antispasmodic agent, often combined with an analgesic) has been the subject of multiple clinical investigations to assess its effects on abdominal discomfort and related conditions.

Efficacy Data from Controlled Trials

Clinical research, including randomized controlled trials (RCTs), generally indicates that antispasmodic agents may be associated with improvement in symptoms like abdominal pain and cramping, which are characteristic of conditions such as Irritable Bowel Syndrome (IBS) and dysmenorrhea (menstrual pain).

  • Abdominal Pain: In studies comparing the antispasmodic component against a placebo for abdominal pain related to gastrointestinal (GI) spasms, the active agent was consistently observed to be beneficial. Meta-analyses involving several RCTs have supported the use of antispasmodics for general abdominal pain relief.
  • Dysmenorrhea: Evidence, primarily from randomized controlled trials, suggests that the use of Spasmocin’s components in combination may reduce the intensity of menstrual pain. Data from patient diaries in some trials indicated lower pain scores when using the combination treatment compared to baseline or placebo.

Study Limitations and Safety Profile

While the findings suggest a positive effect, some limitations in the clinical evidence have been noted. Analyses of studies involving antispasmodics for chronic abdominal pain often cite small sample sizes, short treatment durations, and variability in study design, which can make broad generalizations challenging.

Regarding safety, the antispasmodic component in Spasmocin is generally reported to be associated with side effects consistent with its class. These may include common anticholinergic effects such as dry mouth, blurred vision, and dizziness. Severe adverse events are considered rare. The safety profile has been reviewed across multiple clinical trial databases and post-marketing experience, supporting its established use for relief of GI and genito-urinary spasms. However, specific contraindications exist for patients with certain pre-existing conditions.

Frequently Asked Questions (FAQ)

Common questions about Spasmocin (FAQ)


Q: Does Spasmocin typically cause drowsiness or dizziness?

According to the official product information, dizziness is listed as a common side effect of Spasmocin. Drowsiness or sleepiness is also mentioned in regulatory reports as a possible, but generally uncommon, effect. Official documents advise caution regarding activities like driving or operating machinery when these effects are present.


Q: Does Spasmocin have any known interactions with over-the-counter cold or flu medicines?

Regulatory profiles advise caution with over-the-counter (OTC) products that may contain ingredients that could intensify the effects of Spasmocin. This includes medicines with other anticholinergic components or antihistamines, as combining them with Spasmocin is documented to potentially increase the risk of side effects like dry mouth or drowsiness.


Q: Are there any specific foods or drinks that should be avoided when taking Spasmocin?

Official administration guidelines state that the medicine can generally be taken regardless of food intake. However, official product information advises avoiding alcohol as it may increase the chance of side effects. It is also noted that certain products like antacids may reduce the oral absorption of the medicine.


Q: Is Spasmocin available in a generic version?

Spasmocin is a brand name, and its single active ingredient is Hyoscine Butylbromide. This active substance is the internationally recognized generic name for the compound. The medicine may be available under the generic name in various regions.


Q: How quickly should I expect Spasmocin to start working?

Clinical literature indicates that the onset of action for Spasmocin is relatively rapid. The specific speed of action can vary based on the form of the medicine, with injectable solutions acting faster than the oral tablet form.


Q: Is it normal to feel a bit nauseous when first starting Spasmocin?

Official safety information indicates that nausea has been reported as an adverse reaction in the drug's safety profile.


Q: Does Spasmocin interact with common pain relievers like ibuprofen or acetaminophen?

Regulatory documents do not specifically list direct chemical interactions with common pain relievers like ibuprofen or acetaminophen. Official information does caution against combining Spasmocin with other medicines that may cause drowsiness or be associated with increased gastrointestinal risk.


Q: Is Spasmocin a type of opioid or narcotic?

No, Spasmocin is not a type of opioid or narcotic. It is classified as an antispasmodic agent with a peripheral-acting anticholinergic mechanism. The drug’s chemical structure is designed to limit its effects to the body's periphery, minimizing central nervous system effects.


Q: Does Spasmocin require a prescription in most places?

Regulatory product information indicates that in many countries, Spasmocin (Hyoscine Butylbromide) is available without a prescription for the symptomatic relief of spasmodic pain. Prescription status can, however, vary based on local regulations and the specific dosage form.


Q: What should I do if the medicine doesn't seem to be working after a few days?

Official patient information indicates that medical attention should be sought if the abdominal pain is severe or persistent, begins to worsen, or does not improve within 48 hours. These situations require professional investigation into the underlying cause of the symptoms.


Q: Does Spasmocin affect a person's ability to drive or operate machinery?

Official documents contain a specific warning regarding activities requiring full attention. Due to the possibility of side effects such as blurred vision and dizziness, official guidance advises against driving or operating machinery until any vision changes have resolved.


Q: Is Spasmocin a medicine that can be easily abused or is it addictive?

Spasmocin is not classified as a narcotic or addictive substance. Due to its chemical structure, the drug has a low incidence of abuse in its intended, therapeutic form because its action is limited to the body's periphery and does not significantly affect the brain.


Q: What is the typical duration of effect for a single dose of Spasmocin?

According to official pharmacokinetic studies, the clinical effect of a single dose of Spasmocin typically lasts for approximately 4 to 6 hours. This duration is generally aligned with the frequency of administration suggested in regulatory dosing schedules.


Q: What happens if I accidentally take two doses of Spasmocin too close together?

In the event of accidental overdosage or taking doses too close together, regulatory information states that immediate medical advice should be sought. Symptoms of overdosage described in regulatory information may include a rapid heart rate, dry mouth, difficulty passing urine, and sight disturbances.


Q: Does Spasmocin interact with common supplements like multivitamins or magnesium?

Regulatory sources generally state there is not enough information available to confirm whether complementary or herbal supplements are safe to take with Spasmocin. Official sources indicate that it is appropriate to consult a healthcare professional for advice on combining the medicine with specific supplements.


Q: What should I do if I miss a scheduled dose of Spasmocin?

Official instructions state that if you forget a dose, you should take it as soon as you remember. However, if it is almost time for your next scheduled dose, official guidance indicates that the missed dose should be skipped entirely. Regulatory guidance strictly advises against taking a double dose to make up for a forgotten one.


Q: Why is Spasmocin sometimes used for conditions that aren't technically 'spasms'?

Regulatory literature documents a specific non-treatment use for this medicine. It is officially used as an antispasmodic agent in certain diagnostic procedures, such as CT scans and MRI studies, where it temporarily reduces the movement of the bowel to improve the quality of the image.


Q: Can Spasmocin affect the results of lab or medical tests?

Yes, official product labeling indicates that Spasmocin can affect the results of certain laboratory tests. For example, it may interfere with the gastric secretion test, potentially leading to false results and requiring special consideration by laboratory staff.


How should Spasmocin be stored and disposed of?

How to Store and Dispose of Spasmocin

Spasmocin (Hyoscine Butylbromide) must be stored strictly according to official regulatory labeling to maintain its stability.

Storage Requirement Official Instruction
Temperature Store at temperatures not exceeding 30 C.
Protection Keep the product protected from light and stored in a dry place in its original container.
Child Safety Keep out of the sight and reach of children and pets.
Stability Note Do not use after the expiry date. The injection solution must be used immediately after opening.

For disposal, do not throw away any medicines via wastewater or household waste. Unused or expired product must be disposed of in accordance with local requirements and regulations. You may consult your pharmacist for proper disposal methods.

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

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