Hyomide

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Medically reviewed

Rosario Oropesa

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 Hyomide

Hyomide: Definition and Pharmacological Classification

Property Description
Active ingredient Hyoscine Butylbromide (Scopolamine Butylbromide)
Form Tablet, Injection Solution, Suppository
Pharmacological class Antispasmodic, Anticholinergic agent
Common use Relief of pain associated with smooth muscle spasms
Origin Synthetic derivative (Quaternary ammonium compound)

Hyomide is a prescription-only medicinal product classified as an antispasmodic agent and an anticholinergic agent. Its active ingredient is Hyoscine Butylbromide, a compound utilized to relax the involuntary muscles of the body. Pharmacological studies confirm that Hyoscine Butylbromide has a high affinity for muscarinic receptors on the smooth muscle cells of the gastrointestinal tract. This affinity is a key feature, as it means the medicine is designed to effectively target the source of the spasm.

The active substance is a synthetic derivative specifically engineered as a quaternary ammonium compound. This chemical structure is critical to its therapeutic profile because it functions as a peripheral-acting agent, ensuring its effects are focused on the muscles of the internal organs while minimizing influence on the central nervous system. This characteristic differentiates it from related anticholinergic alkaloids, ensuring highly localized action.


What is the General Purpose of Hyoscine Butylbromide?

The general purpose of the active ingredient in Hyomide is to provide focused spasmolytic relief by calming excessive muscle contractions in internal organs. The medicine is designed to relax the smooth muscles found in the walls of the stomach, intestines, biliary tract, and urinary tract. It is clinically recognized for its reliable action against the cramping pain that arises from these spasms.

This function directly addresses the cramping and discomfort associated with involuntary spasms in these systems. By selectively blocking the muscarinic receptors, Hyomide stops the spasm itself, which is the basis for its use in treating abdominal pain secondary to cramping. This confirms the medicine’s primary value lies in treating the cause of the muscle tightness rather than functioning solely as a general pain reliever.


Understanding Hyomide's Available Forms

Hyomide is supplied as a single-ingredient product in multiple pharmaceutical preparations to suit different needs and routes of administration. The medicine is commonly available as a tablet for oral administration, and also as a solution for injection—a parenteral preparation utilized for a quicker effect in acute settings. Furthermore, preparations may include suppositories for rectal administration. This range of options highlights the versatility of the Hyoscine Butylbromide formulation in clinical practice.

What side effects are possible with Hyomide?

Possible Side Effects and Safety Information

This section describes the adverse reactions and safety statements for Hyomide (Hyoscine Butylbromide) as documented in official government regulatory information.

Frequency-Classified Adverse Reactions

The side effects of Hyomide are organized by how frequently they occur, primarily reflecting the drug's anticholinergic properties.

Classification Examples of Adverse Reactions (SOC)
Common (1 to 10 in 100 people) Dry mouth (Gastrointestinal), Tachycardia (Cardiac), Accommodation disorders/blurred vision (Eye)
Uncommon (1 to 10 in 1,000 people) Skin reactions like rash and urticaria (Skin), Reduced sweating (Skin)
Not Known (Frequency cannot be estimated) Anaphylactic shock (Immune System), Increased intraocular pressure (Eye), Decreased blood pressure (Vascular), Urinary retention (Renal and Urinary)

Serious Safety Considerations

Official labeling highlights the potential for rare but clinically significant adverse events, particularly with the injectable formulation. These include anaphylactic shock (including fatal outcomes) and severe cardiac adverse reactions such as profound hypotension or tachycardia, especially in patients with pre-existing heart conditions. The drug is contraindicated for patients with specific conditions, including narrow-angle glaucoma, prostatic enlargement leading to urinary retention, and mechanical stenosis of the gastrointestinal tract, as use may exacerbate these conditions.

Population and Contextual Safety Notes

  • Patients with Cardiac Conditions: Use requires caution due to the risk of severe tachycardia. Close monitoring is advised for patients receiving the drug by injection.
  • Older Adults: Increased risk of anticholinergic side effects such as confusion and urinary retention. Doses should not exceed recommendations.
  • Driving: Patients are formally advised that they may experience dizziness or blurred vision and should not drive or operate machinery if these effects occur.

Overdose and Emergency Response

Overdose Manifestations and Complications

Official regulatory documents state that an overdose of Hyomide presents primarily with symptoms of excessive anticholinergic effects. These documented manifestations include tachycardia (fast heart rate), urinary retention, dry mouth, reddening of the skin, and transient visual disturbances. These manifestations are noted across various physiological systems, including cardiovascular, ocular, and urinary.

In cases of severe intoxication, serious complications are noted in regulatory summaries. These include the potential for respiratory paralysis and severe respiratory patterns such as Cheynes-Stokes respiration. Severe overdose may also progress to circulatory failure or coma, classifying these as severe, life-threatening outcomes in official documentation.

Emergency Actions Required

Regulatory guidance mandates that immediate medical advice must be sought if severe, unexplained abdominal pain persists or is accompanied by specific signs. These urgent indicators include fever, fainting, decreased blood pressure, blood in stool, or persistent vomiting. Additionally, patients must seek urgent ophthalmological advice if they develop a painful, red eye with loss of vision, as this is officially stated as a required action in labeling.

Supportive Management and Antidote

Overdose management is stated as symptomatic and supportive. For oral poisoning, treatment may involve gastric lavage using activated charcoal and magnesium sulfate. Specific procedural interventions may be required, such as catheterisation for documented urinary retention. Regulatory documents confirm that the symptoms of overdose respond to parasympathomimetics, which represents the functional antidote class. The treatment of cardiovascular complications is conducted according to usual therapeutic principles.

Therapeutic Uses of Hyomide

Main Uses of Hyomide

Hyomide is an antispasmodic medication primarily used to relieve symptoms associated with spasms of the smooth muscle in the gastrointestinal and genitourinary tracts. Its active ingredient, hyoscine butylbromide, works by relaxing the muscles in these areas to alleviate discomfort.

Gastrointestinal Conditions

The medication is commonly used to treat conditions characterized by abdominal cramping and pain, including:

  • Irritable Bowel Syndrome (IBS): Helps manage the abdominal pain and bowel disturbances caused by intestinal spasms.
  • Gastrointestinal Spasms: Provides relief from acute cramping of the stomach or intestines.
  • Biliary Colic: Used to address the pain associated with spasms in the bile ducts.

Genitourinary Conditions

Hyomide is also indicated for the relief of spasms in the urinary and reproductive systems, such as:

  • Bladder Spasms: Helps reduce urgency and pain related to involuntary bladder muscle contractions.
  • Renal Colic: Used to alleviate the intense pain caused by spasms in the ureters, often associated with kidney stones.
  • Dysmenorrhea: May be used to relieve painful menstrual cramping by relaxing the uterine muscles.

Benefits

The primary benefit of Hyomide is the targeted relaxation of smooth muscle without significantly affecting the central nervous system. By acting locally on the site of the spasm, the medication helps to:

  • Reduce Pain Intensity: By easing muscle contractions, it addresses the underlying cause of cramping pain.
  • Improve Comfort: Relaxation of the digestive or urinary tract can facilitate more normal function and reduce physical distress.
  • Provide Rapid Relief: The medication is designed to act quickly on localized spasms to provide symptomatic improvement.

Eligibility and Restrictions for Use

Who Can and Cannot Use Hyomide?

Hyomide (Hyoscine Butylbromide) use is strictly defined by specific population eligibility rules established in official regulatory documents.

Absolute Contraindications (Must Not Use) The medicine is strictly contraindicated and must not be used by individuals with certain pre-existing conditions. These include: Myasthenia gravis, narrow angle glaucoma, and conditions causing mechanical obstruction in the gastrointestinal tract, such as paralytic ileus or megacolon. Contraindications for the injection form extend to severe cardiac conditions like tachycardia or cardiac failure. Use is also restricted for patients with hypersensitivity to the active substance.

Age and Reproductive Restrictions The medicine's use is generally established for adults and adolescents. The oral tablet is not recommended for children under 6 years of age. Use is also not recommended during pregnancy or breastfeeding, as a precautionary measure due to insufficient human safety data regarding fetal and infant safety.

Conditional Use and Specific Cautions The medicine requires caution in patients with pre-existing cardiac conditions, such as cardiac arrhythmia or hypertension, and those susceptible to urinary or intestinal obstructions. Additionally, the intramuscular injection is contraindicated in patients receiving anticoagulant drugs due to the risk of haematoma. Eligibility for patients with rare hereditary sugar intolerances is also restricted for tablet forms.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Hyomide (Hyoscine Butylbromide) establishes interactions primarily related to its pharmacological activity and effects on absorption.


Pharmacodynamic Effects and Exposure

Co-administration with other anticholinergic agents results in the documented intensification of anticholinergic effects. This includes several product classes such as tricyclic and tetracyclic antidepressants, antihistamines, quinidine, and certain antipsychotics. Conversely, co-treatment with Dopamine Antagonists (e.g., metoclopramide) may lead to a diminution of the effects of both medicines on the gastrointestinal system. Additionally, the tachycardic effects of Beta-adrenergic Agents may be enhanced.


Pharmacokinetic Constraints and Restrictions

Hyomide can reduce gastrointestinal motility, which may cause delayed systemic absorption of other co-administered oral medications. To manage this effect, timing separation is required for Antacids and Adsorbent-type Anti-diarrhea Drugs (e.g., kaolin-pectin): Hyomide should be given at least one hour before these substances to mitigate the reduction in absorption of Hyomide itself.

A critical interaction-related restriction applies to the parenteral form: Intramuscular (IM) injection is prohibited for patients receiving Anticoagulant Drugs due to a documented risk of intramuscular haematoma. Subcutaneous or intravenous routes are listed as acceptable alternatives.

Mechanism of Action

How Hyomide Works


Targeted Receptor Modulation

Hyomide's primary mechanism involves acting as a targeted modulator at specific [Primary Receptor Type] receptors, binding to an allosteric site to dampen the receptor's sensitivity. This initial interaction defines the drug's core biological target, initiating the controlled reduction of excessive signaling within the system.

Pathway Signal Dampening

The action at the receptor level modifies downstream signal transduction cascades involving key intracellular mediators. By effectively attenuating the heightened activation of these pathways, Hyomide limits the propagation of overactive cellular messages, thereby interfering with the molecular steps that drive physiological dysregulation.

Physiological System Recalibration

Collectively, these mechanisms contribute to the regulation of overactive physiological processes within defined central and/or peripheral systems. This targeted adjustment supports a more balanced and regulated state, leading to predictable physiological adjustments that stabilize the system and shape the overall effect profile.

Dosage and Administration Information

How Hyomide is Used: Administration Guidelines

Hyomide (Hyoscine Butylbromide) is utilized in clinical practice to address acute and symptomatic needs, with defined routes, dosage, and frequency patterns. Its use is generally intended for short-term relief and is not intended for continuous daily administration without re-evaluation by a health professional.


Approved Administration Routes and Forms

Hyomide is supplied in multiple forms to accommodate different clinical scenarios and administration needs:

  • Oral: Tablets (typically 10 mg or 20 mg), which can be taken regardless of food intake.
  • Parenteral: A solution for injection (20 mg/mL) administered intravenously (IV), intramuscularly (IM), or subcutaneously (SC).
  • Rectal: Suppositories, available in certain regions.

Standard Dosing Regimens

Standard dosing is governed by the specific form and patient population, with defined maximum limits:

Population / Form Standard Dose Maximum Daily Dose
Adults (Oral) 10 mg to 20 mg per dose. 80 mg
Adults (Parenteral) 20 mg initial dose. 100 mg
Pediatric (6–12 years, Oral) 10 mg per dose. 30 mg

For acute episodes, the initial parenteral dose may be repeated after 30 minutes. For oral use, the medication is generally administered up to four times daily. Procedural requirements dictate that IV injection must be administered slowly. Furthermore, in patients receiving anticoagulant therapy, the IM route is avoided, with preference given to the IV or SC routes.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Hyomide (Hyoscine Butylbromide)

Evidence for Acute Abdominal Cramping Pain

The primary research for Hyomide was studied in populations experiencing acute, general abdominal cramping. These are conditions often associated with acute or disruptive episodes. The evidence for this core purpose consists mainly of randomized, placebo-controlled trials (RCTs) and subsequent systematic reviews.

These trials research examined how quickly patients reported a change in experience and monitored the outcomes related to physical discomfort using patient-reported scores. The research focused on short-term or episodic symptom patterns in adults. Findings reported that measurements related to physical discomfort were observed to be different from those reported by participants in the placebo group.

Research on Spasm-Related Pain in Specific Conditions

Research was studied for its use as a symptomatic treatment in conditions such as Irritable Bowel Syndrome (IBS). Analyses examined patient-reported outcomes describing perceived discomfort and global IBS symptom severity. While the overall pattern data show measured changes in symptom patterns across the class of medicines studied, the specific findings were mixed for Hyomide in some individual trials compared to placebo. This suggests that evidence quality varies across studies, and existing research provides limited insight into findings for chronic symptom management.

Hyomide was evaluated in some studies focusing on pain associated with acute gastroenteritis. In this specific scenario, some trials did not report a significant difference in measurements of reported discomfort between Hyomide and placebo after 30 to 60 minutes.

Duration of Study Follow-up and Research Gaps

The clinical research base for Hyomide generally focuses on short-term outcomes related to episodic or acute changes in the medicine. The follow-up durations were limited in many primary RCTs, meaning research mainly contributes to understanding symptom patterns during phases of heightened symptom activity.

Long-term effects are not fully established. There are limited studies that research examined the durability of symptom change over months or years. Key limitations include the variability in findings for complex conditions like IBS, where comparative evidence is lacking to clearly differentiate the measurements of effect between Hyomide and other agents studied for similar symptom relief.

Key Studies & References

  1. Hyoscine butylbromide: a review of its use in the treatment of abdominal cramping and pain
  2. A Comprehensive Review of the Effects of Hyoscine Butylbromide in Childhood
  3. Impact of Hyoscine Bromide Use on Polyp Detection Rate

Frequently Asked Questions (FAQ)

Common questions about Hyomide (FAQ)


Q: Is Hyomide used for any other conditions besides the main one?

Official documents describe that Hyomide is used for symptomatic relief in several conditions, including Irritable Bowel Syndrome (IBS). It is also described for use in conditions associated with acute muscular spasm, such as renal or biliary colic. This reflects its primary action of relaxing smooth muscles.


Q: Does Hyomide cause long-term side effects?

According to the official product information, this medicine is generally intended for short-term relief of acute symptoms. Due to the limited duration of many clinical trials, the research primarily focuses on episodic use. Therefore, official guidance advises against its use on a continuous daily basis or for long periods without further medical investigation.


Q: Can Hyomide interact with common over-the-counter pain relievers?

Hyoscine Butylbromide is commercially available in combination with Paracetamol, which is a widely used over-the-counter pain reliever. For other common medicines, specific interaction warnings are typically assessed under classes such as Non-Steroidal Anti-Inflammatory Drugs (NSAIDs). It is generally important for patients to check with a healthcare professional regarding the potential for interactions with any medicine they take.


Q: What are the early signs of a serious side effect from Hyomide?

Serious side effects, though rare, require immediate attention. Official sources indicate that if patients experience symptoms such as a painful red eye with loss of vision or sudden confusion or hallucinations, the information suggests that immediate medical attention may be required. Other serious signs listed include the inability to pass urine or a fast, pounding heart rate that is persistent.


Q: Does the efficacy of Hyomide decrease over time?

Studies and official information indicate that the medicine is primarily used for short-term, acute relief of spasms. Because the follow-up duration in clinical trials has been generally limited, the available research does not provide extensive insight into how long the efficacy is maintained during continuous use over many months or years.


Q: What is the role of Hyomide in the overall treatment plan for the condition?

The role of Hyomide is to provide focused symptomatic relief by acting as an antispasmodic. It works by relaxing the smooth muscles found in the walls of the gastrointestinal, biliary, and urinary tracts. This action is designed to directly address the cramping pain that arises from these involuntary muscle spasms.


Q: What kind of patient monitoring is typically advised while on Hyomide?

Official documents state that close monitoring is required for patients with pre-existing heart conditions, especially when the medicine is administered as an injection. In general, information suggests that a consultation with a healthcare professional may be needed if symptoms worsen or if any side effects become severe or bothersome.


Q: How quickly does Hyomide usually start working?

The onset of effect depends on the form used. For the oral tablet form, some product information indicates that relief may be observed within 15 minutes. When administered as an injection, the effects generally begin slightly later, after about 20 minutes.


Q: What happens if I miss a dose of Hyomide?

Official patient documents state that the usual instruction for a missed dose is to take it as soon as it is remembered. However, it is explicitly stated that patients must not take two doses at the same time or close together to try and compensate for a missed dose. This is crucial if it is almost time for the next scheduled dose.


Q: Are there specific foods or drinks that interact with Hyomide?

Official patient advice indicates that, apart from the recommendation regarding alcohol, a person can eat and drink normally while taking this medicine. The general food intake does not typically affect how the medicine works.


Q: What is the risk of dependence or withdrawal with Hyomide?

Regulatory documents describe that the medicine's chemical structure prevents it from easily crossing the blood-brain barrier. This design ensures that the medicine is not centrally active and typically results in a low incidence of abuse. Accordingly, specific warnings about dependence or withdrawal are generally not listed in official sources.


Q: Are there any specific lifestyle changes that affect how Hyomide works?

Regulatory documents caution that the medicine may decrease sweating, which can increase a patient's risk of developing heatstroke. Official information states that it is necessary to avoid becoming overheated during high temperatures, exercise, or any strenuous activity.


Q: Can I take Hyomide if I have a history of liver problems?

The official prescribing information lists that the medicine is contraindicated (must not be used) for patients who have severe hepatocellular insufficiency. Caution is also generally indicated for patients with any history of liver disease.


Q: Do official sources mention an interaction between Hyomide and alcohol?

Yes, official documents provide a warning, stating that the consumption of alcohol is discouraged while using the medicine. This is because alcohol may increase the chance of side effects such as drowsiness or dizziness.


Q: Can I split or crush Hyomide tablets?

The official administration instruction is to swallow the tablets whole with liquid and explicitly states that the tablets must not be broken, crushed, or chewed.


Q: Do studies show Hyomide affects mood or sleep?

While the medicine is designed to minimize central nervous system effects, official labeling lists rare side effects that include confusion, agitation, and hallucinations. Additionally, drowsiness or sleepiness is also listed as an uncommon or possible side effect.


Q: Can taking Hyomide cause problems with sun exposure?

The official warning relates to the risk of heatstroke because the medicine may decrease sweating. Official product information states that it is necessary to avoid becoming overheated during any exposure to high temperatures or during strenuous activity, including extended time in the sun.


Q: Is Hyomide cleared from the body quickly?

Pharmacokinetic data shows that the medicine has a very short half-life in the bloodstream, indicating quick distribution to the tissues where it acts. The medicine is then eliminated from the body primarily through the kidneys and faeces; however, its systemic availability is low after oral use.


Q: What is the typical duration of effect after taking a dose of Hyomide?

The product is used for short-term, acute relief of spasms. The duration of effect can vary, but for the injection form, the effect can last for up to 8 hours according to some product information.


Q: Is the half-life of Hyomide known?

Yes, the medicine's half-life is known based on regulatory data and is described as very short in the bloodstream (approximately 3 minutes for the initial distribution phase). This short half-life reflects its design to quickly distribute to tissue receptors at the site of action.

How should Hyomide be stored and disposed of?

Storage and Disposal of Hyomide

Hyomide (hyoscine butylbromide) must be stored under specific environmental and container constraints as defined in its official labeling to maintain stability.

Storage Requirements

  • Temperature and Light: The medicine requires storage at temperatures not exceeding 30°C and must be protected from light.
  • Child Safety: All forms of the product must be kept out of the sight and reach of children.
  • Container: The product should be stored in the original container and kept tightly closed to maintain its integrity.
  • Post-Opening: Ampoules for injection are for single use only, and any unused portion must be discarded immediately.

Disposal Instructions

Any unused or expired product must be disposed of in accordance with local requirements for pharmaceutical waste. Used needles and syringes (sharps) must be placed only in an approved sharps container.

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

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