Vellios

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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 Vellios

Quick Facts

Property Description
Active ingredient Hyoscine Butylbromide (Scopolamine Butylbromide)
Form Tablet, Solution for Injection, Suppository
Pharmacological class Antispasmodic / Anticholinergic agent
Common use Relief from muscle spasms and cramping (visceral pain)
Origin Synthetic compound (derivative of a natural alkaloid)

What is Vellios and What Type of Medicine is it?

Vellios is a brand-name medicine whose active component is Hyoscine Butylbromide, which is primarily classified as an antispasmodic agent. This medicine is designed to relieve spasms and painful cramping in the body's internal, smooth muscles, and belongs to the broader pharmacological class of anticholinergic agents. The compound is a synthetic derivative of a naturally occurring tropane alkaloid. This chemical modification, which results in a quaternary ammonium derivative, is crucial as it ensures the drug’s activity is highly focused on the body’s peripheral nervous system, preventing it from significantly affecting the central nervous system. This structural feature is clinically recognized for delivering localized therapeutic action.


Composition, Origin, and Available Forms

The efficacy of Vellios depends entirely on the activity of Hyoscine Butylbromide. Due to its chemical characteristics, the compound is poorly absorbed after oral administration, allowing its spasmolytic effects to be concentrated within the walls of the gastrointestinal, biliary, and genitourinary tracts. This targeted function aids in easing visceral contractions. Vellios is manufactured in several identity-level dosage forms, notably the conventional tablet for patient use and the sterile solution for injection—used for rapid delivery in medical settings.


General Purpose: Relief of Visceral Spasm

By functioning as a muscarinic receptor antagonist, the overarching purpose of Vellios is to interrupt the nerve signals that stimulate smooth muscle walls to contract excessively, thereby inducing smooth muscle relaxation. This focused action allows Vellios to deliver general relief from visceral discomfort and cramping caused by the hypermotility or overactivity of these internal organ systems, easing tension and promoting the return to normal function during periods of digestive distress.

Regulatory References

  1. WHO Essential Medicines List

What side effects are possible with Vellios?

Possible Side Effects and Safety Information

The safety profile of Vellios (Hyoscine Butylbromide) is primarily defined by its pharmacological classification as an anticholinergic agent. Regulatory documents organize adverse reactions based on their frequency and the affected body system.


Frequency-Classified Adverse Reactions

The most frequently reported effects, classified as Common in regulatory labeling, include dry mouth (xerostomia) and disturbances in vision such as accommodation disorders. Effects classified as Uncommon include specific skin reactions (e.g., urticaria) and decreased sweating (dyshidrosis). Other adverse effects, including tachycardia (increased heart rate) and urinary retention, are often noted from post-marketing reports and classified as Not Known (frequency cannot be estimated from available data).


Serious Reactions and Safety Restrictions

Severe, clinically significant adverse reactions, though rare, are documented. These include severe hypersensitivity reactions such as anaphylactic shock and angioedema, which involve swelling and breathing difficulty, particularly noted after the parenteral (injection) administration.

The official labeling mandates Safety-Related Restrictions for use. The medicine is contraindicated in conditions where anticholinergic activity could be detrimental, such as untreated narrow-angle glaucoma, myasthenia gravis, gastrointestinal mechanical obstructions (e.g., paralytic ileus or megacolon), and prostatic hypertrophy leading to urinary retention. Furthermore, the medicine is not generally recommended for use during pregnancy or lactation due to insufficient data.

Overdose and Emergency Response

The official regulatory profile for Vellios (Hyoscine Butylbromide) overdosage describes manifestations resulting from exaggerated anticholinergic effects, which are generally categorized as mild and short-lived. However, immediate medical attention must be sought if overdosage is suspected or confirmed.

The documented clinical signs of overdose include tachycardia (fast heart rate), dry mouth (xerostomia), reddening of the skin, urinary retention, and transient visual disturbances.

Rare, serious complications have been reported, such as respiratory paralysis, which necessitates the consideration of intubation and artificial respiration. Isolated reports following parenteral administration have also documented CNS effects including confusion, agitation, drowsiness, and rarely, coma.

Official Management Procedures

Treatment is primarily symptomatic and supportive. Regulatory documents state that the symptoms of overdosage respond to parasympathomimetics. For oral poisoning, official procedures include gastric lavage with activated charcoal and the administration of magnesium sulphate. Management of severe symptoms, such as urinary retention, may require specific procedural steps like catheterisation, as defined in the regulatory labeling.

Therapeutic Uses of Vellios

Quick Facts

  • Approved Use: Management of moderate to severe vasomotor symptoms (VMS) associated with menopause.
  • Goal of Therapy: To support the reduction of the frequency and severity of VMS (commonly known as hot flashes or hot flushes).

Vellios (fezolinetant) is an approved prescription medication for the management of moderate to severe vasomotor symptoms (VMS) that occur due to menopause. The primary therapeutic domain of this medicine is to support the reduction of how often VMS occurs and the overall intensity of the symptoms. By addressing these symptoms, Vellios aims to contribute to improved quality of life for individuals experiencing the effects of VMS.

The medication is indicated for use in this specific population and should be administered under the guidance of a healthcare professional. It is generally well-tolerated in the approved patient population, though the potential for adverse events should be discussed with a qualified medical provider. This medication is approved for this specific indication as documented in the prescribing information.

Eligibility and Restrictions for Use

The eligibility for Vellios (fezolinetant) is strictly defined by regulatory authorities and is limited to specific patient groups based on organ function, concomitant medications, and physiological status.

Regulatory Eligibility Classifications

Classification Population Status Organ Function Restriction
Contraindicated Pregnancy; Concomitant CYP1A2 inhibitors Severe Renal Impairment; Known Cirrhosis
Not Recommended Moderate Hepatic Impairment (Child-Pugh Class B); Age gt 65 at initiation
Conditional Use Women of childbearing potential Baseline ALT/AST ge 2 imes ULN must be ruled out

Official Eligibility Statements

  • The medicine is contraindicated in women with severe renal impairment or end-stage renal disease, and in those with known cirrhosis.
  • It is also prohibited for individuals who are taking concomitant strong or moderate CYP1A2 inhibitors.
  • The medicine is not indicated for the pediatric population and is contraindicated during pregnancy.
  • Treatment initiation is strictly prohibited if baseline ALT or AST is ge 2 times the Upper Limit of Normal (ULN).

Regulatory documents define who can and cannot use this medicine by establishing absolute contraindications for conditions like severe organ dysfunction. Use is exclusively for adult postmenopausal women, and is officially not recommended for women with moderate hepatic impairment or women over 65 years of age initiating therapy, ensuring its use is contained within a narrowly defined, established population.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Vellios (Hyoscine Butylbromide) is defined by documented pharmacodynamic interactions and mandatory administration restrictions. Government sources do not formally classify this medicine as having clinically significant pharmacokinetic interactions via CYP enzymes or drug transporters that require co-administration adjustment.

Interaction Type Interacting Substances / Classes Official Outcome
Pharmacodynamic Intensification Tricyclic and Tetracyclic Antidepressants, Antihistamines, Quinidine, Amantadine, Antipsychotics (e.g., Phenothiazines), and other Anticholinergics. Risk of additive anticholinergic effects is increased.
Opposing Physiological Action Dopamine Antagonists, such as Metoclopramide. Diminution of effects on the gastrointestinal tract due to counteracting action.
Cardiovascular Potentiation Beta-Adrenergic Agents. The tachycardic effects may be enhanced.

Administration Restrictions and Timing Rules

A critical administration route restriction applies to the solution for injection: the intramuscular injection of Vellios is strictly prohibited in individuals receiving anticoagulant drugs. This is an officially documented constraint due to the specific risk of intramuscular haematoma.

To maintain therapeutic effectiveness and ensure adequate absorption of the oral form, regulatory documents mandate a required timing separation from certain substances. Vellios must be administered at least one hour before co-administration of Antacids or Adsorbent Antidiarrheals. Official information also notes that consumption of alcohol may increase the chance of experiencing certain side effects, such as drowsiness.

Mechanism of Action

Vellios initiates its action primarily through Positive Allosteric Modulation (PAM) of the Serotonin 5-HT2 C Receptor, located within the Central Nervous System. This interaction does not activate the receptor directly but enhances the signaling capacity of the body's natural neurotransmitter. This action results in amplification of the G q protein cascade within the target cell, which involves enhanced Phospholipase C (PLC) activity and subsequent intracellular Ca^2+ release. This mechanism is supported by a secondary action: antagonism of the inhibitory Adenosine A1 Receptor. This antagonism blocks the inhibitory effect of the A1 receptor on the neurological signal, ensuring the primary 5-HT2 C-mediated signal is enhanced. The combined molecular actions centrally adjust the efferent output of the Autonomic Nervous System (ANS). This modulation shifts the balance of signals controlling vessel tension and acts peripherally to consistently adjust systemic vascular resistance. This process modifies circulatory dynamics, which is the foundational physiological basis for the drug's effect profile.

Dosage and Administration Information

Vellios is administered as a fixed-dose 45 mg tablet taken orally, once daily. This standardized regimen is the sole approved dose for the management of the approved indication, establishing a non-titrated approach to its use. The medicine must be scheduled for administration at approximately the same time each day to maintain consistent plasma levels.

For administration, the tablet may be taken with or without food for scheduling flexibility. The tablet must always be swallowed whole with liquids; the tablets should not be cut, crushed, or chewed.

The protocol for a missed dose specifies that the forgotten tablet should be taken immediately upon recollection, unless the elapsed time leaves fewer than 12 hours before the next scheduled dose. In this specific scenario, the missed dose must be skipped, and the regular schedule is resumed the following day.

Regarding specific populations, the administration protocol remains consistent. No dose adjustment is required for individuals diagnosed with mild or moderate renal impairment. Similarly, the 45 mg dose is maintained for patients with mild chronic hepatic impairment. The use of this medicine is not indicated for pediatric patients, and there is no dose recommendation for older adults (65 years and over) initiating treatment. The treatment's continued use must be periodically reassessed by a healthcare professional.

Recent Clinical Evidence

Research evidence / Overview of Studies for Vellios (Hyoscine Butylbromide)

Evidence for Acute Abdominal Cramping and Pain (Gastrointestinal Spasm)

Research on Hyoscine Butylbromide was primarily conducted in the context of sudden abdominal discomfort, and is largely based on short-term randomized controlled trials (RCTs). These studies were used to explore how symptoms change over time when the medicine is used for conditions characterized by functional or episodic manifestations. Researchers studied outcomes related to physical discomfort, primarily focusing on measured changes in pain intensity using standardized patient-reported scales. Trials that included a placebo comparison reported measurements of pain intensity change that were observed in the group receiving the medicine. Research involving active comparison agents reported that the patterns observed were sometimes similar across the tested agents.

Evidence for Recurring Spasm and Functional Gut Disorders

Research also examined the medicine in conditions characterized by fluctuating or episodic manifestations, including Irritable Bowel Syndrome (IBS). Studies were used in research contexts involving fluctuating or unstable symptoms, with outcomes related to patient-reported perceived discomfort and overall functional measures. Studies reported patterns where measured changes in the frequency and severity of abdominal pain were observed compared to a non-active treatment.

Research Gaps and What Remains Uncertain

Scientific reviews highlight that the evidence quality varies across studies, with some older protocols lacking the rigor of modern RCTs. For specific causes of abdominal pain in acute settings, studies focusing on episodes where symptoms become more noticeable have produced mixed findings. Furthermore, long-term effects are not fully established, as follow-up durations were limited in most key efficacy trials. Research provides context but not individual predictions, and findings describe group patterns, not personal outcomes.

Key Studies & References

  1. LO36: Hyoscine butylbromide (Buscopan) for abdominal pain in children: a randomized controlled trial
  2. What do Cochrane systematic reviews say about the management of irritable bowel syndrome?

Frequently Asked Questions (FAQ)

Common questions about Vellios (FAQ)


Q: Is Vellios the same kind of drug as [Similar Drug Name]?

A: Vellios is an antispasmodic agent, which means it helps relieve muscle cramps or spasms. It belongs to the pharmacological class of anticholinergics (muscarinic receptor antagonists). Official sources describe it as a quaternary ammonium derivative, a structure that indicates its primary action is focused on the peripheral nervous system, limiting its effects on the brain.


Q: How quickly can someone expect Vellios to start working?

A: Vellios is indicated for the relief of acute spasm, and its injectable forms are known to provide rapid relief in medical settings. While specific onset times for the oral tablet can vary, it is generally intended to relieve sudden abdominal pain quickly. If relief is not experienced, the appropriateness of continued use may be reviewed by a healthcare professional.


Q: What is the longest someone usually takes Vellios?

A: According to official patient warnings, Vellios should not be taken on a continuous daily basis or for extended periods without investigation into the cause of the symptoms. Periodic reassessment by a healthcare professional is necessary to determine the appropriateness of continuing the treatment.


Q: Can Vellios be taken by people who are generally sensitive to medicine?

A: Vellios is contraindicated (should not be used) in people with a known hypersensitivity or severe allergic reaction to the active substance, Hyoscine Butylbromide, or to any of the other ingredients. Official product information documents severe allergic reactions, such as anaphylactic shock, as a possibility.


Q: Are there any common foods or supplements that interact with Vellios?

A: Official administration guidelines specify that the tablet should be administered at least one hour before antacids or adsorbent anti-diarrheals. This timing is intended to support proper absorption. Information regarding herbal remedies or supplements should be discussed with a healthcare professional to identify potential side effect increases.


Q: Is it normal to feel tired when starting Vellios?

A: Anticholinergic agents can sometimes cause drowsiness or dizziness in some individuals. While the drug is designed to minimize central effects, official sources provide a caution regarding possible visual disturbances and the need to consider their effect on tasks like driving.


Q: Can Vellios affect blood pressure?

A: Official safety data indicates that Vellios can cause adverse reactions, including tachycardia (increased heart rate) and hypotension (decreased blood pressure), especially when given by injection. For individuals with pre-existing heart conditions, caution regarding use is indicated in official product information.


Q: Are there any long-term health risks associated with taking Vellios?

A: Official patient information notes that the medicine should not be taken for extended periods without investigation into the cause of the symptoms. Long-term use of anticholinergics in older adults may be associated with increased susceptibility to side effects like constipation, dry mouth, and urinary retention.


Q: Is Vellios considered a 'controlled substance'?

A: Vellios (Hyoscine Butylbromide) is generally not classified as a controlled substance in major regulatory regions. Depending on the country, it may be available as a prescription-only medicine ( Rx-only) or over-the-counter.


Q: Has Vellios been studied in older adults?

A: Product monographs often state that no specific information on the use or dosage in older adults (geriatrics) is available. Older adults are known to be especially susceptible to the drug’s anticholinergic side effects.


Q: What is the difference between a side effect and an allergic reaction to Vellios?

A: Side effects are expected consequences of the drug's action, such as dry mouth or blurred vision. Allergic reactions are a severe immune response, such as anaphylactic shock or swelling (angioedema). These severe reactions are documented in the official safety labeling and require immediate medical attention.


Q: Why are there different strengths of Vellios available?

A: Vellios is manufactured in different forms and strengths to suit different needs. For example, oral tablets are used for general management, while the parenteral solution (injection) is used in medical settings for rapid relief of acute spasms.


Q: Do I need special monitoring while using Vellios?

A: Official warnings state that patients with certain pre-existing conditions (e.g., cardiac issues or narrow-angle glaucoma susceptibility) may require specific monitoring. Additionally, a healthcare professional must periodically reassess the decision to continue treatment.


Q: Does Vellios have a 'black box warning' in the US?

A: According to the official FDA labeling, a specific Boxed Warning (often called a 'black box warning') is not typically associated with Hyoscine Butylbromide.


Q: Is there a risk of becoming dependent on Vellios?

A: Studies and regulatory knowledge suggest that due to its chemical structure, Vellios is not centrally active. This profile results in a low incidence of abuse potential and does not carry a risk of dependence.


Q: How long does Vellios stay in your system after the last dose?

A: The official pharmacokinetic data indicates that the terminal half-life of the active substance is typically around 4 to 5 hours. Most of the substance is usually eliminated from the body within 48 hours after the dose.


Q: Are there any restrictions on driving or operating machinery while on Vellios?

A: Official patient information warns that due to the potential for visual accommodation disturbances (blurred vision) and dizziness, official warnings state that the ability to drive or operate machinery may be impaired if these effects are experienced.


Q: What makes Vellios different from other drugs for the same condition?

A: Vellios's chemical structure is a quaternary ammonium derivative. This feature is what ensures the drug acts almost exclusively on the peripheral nervous system to target the spasm. This action helps to minimize the drug’s effects on the central nervous system compared to other types of anticholinergics.


Q: Is it typical for side effects from Vellios to fade over time?

A: Official patient information notes that side effects, if they occur at the recommended dose, are usually mild and may disappear after the medicine is stopped. If any side effects, like blurred vision, persist for more than a day or two, guidance from a healthcare provider may be appropriate.


Q: Are there official patient education materials for Vellios?

A: Yes, official regulatory sources provide comprehensive patient-facing documents, such as the Patient Information Leaflet (PIL) or Patient Medication Information. These materials detail the safe and appropriate use of the medicine.


Q: Does Vellios affect sleep patterns?

A: The drug's non-central action is intended to minimize central nervous system effects. However, in rare cases (such as with higher doses or in older adults), mild anticholinergic effects like drowsiness or confusion may occur.


Q: Are there any specific lifestyle changes recommended when taking Vellios?

A: Regulatory documents advise caution with alcohol consumption, as it may increase the chance of experiencing side effects like drowsiness. Otherwise, specific major lifestyle changes are not consistently mandated by official labeling.


Q: Does Vellios have any known long-term cognitive effects?

A: Due to its chemical structure, Vellios is not expected to readily cross the blood-brain barrier, which minimizes the risk of central cognitive effects. However, older adults are especially susceptible to anticholinergic effects that can potentially cause temporary confusion.


Q: Can I take Vellios if I am allergic to another similar medicine?

A: Official warnings state that if a person is intolerant of one belladonna alkaloid or a derivative (a class of compounds including Vellios), they may also be intolerant of others. The disclosure of any past allergies to a healthcare provider is noted as important for assessment.


Q: How is the safety of Vellios monitored after it is released to the public?

A: The safety of Vellios is continuously monitored after its release through regulatory reporting systems. This includes schemes like the MHRA Yellow Card Scheme and the FDA's adverse drug reaction reporting system, which allows for ongoing tracking of its benefits and risks.


Q: Is Vellios suitable for vegetarians or vegans?

A: According to the official label, the tablet form of Vellios contains lactose monohydrate as an inactive ingredient (excipient). Individuals with dietary restrictions may wish to review the full list of ingredients with a pharmacist.


Q: What is the difference between the tablet and the injection?

A: The tablet form is typically used for the relief of general abdominal spasms and cramping. The injection form, which is administered in a medical setting, is indicated for the relief of more acute spasms, such as renal or biliary colic.

How should Vellios be stored and disposed of?

Storage and Disposal Instructions

Official regulatory guidelines define specific requirements for the storage and disposal of Vellios (fezolinetant) tablets.

Storage Conditions

Vellios must be stored at a controlled room temperature between 20°C and 25°C (68°F and 77°F); excursions up to 30°C (86°F) are permitted. To maintain product integrity and protection from moisture, the tablets must be kept in the original container and the cap must remain tightly closed.

For safety, the medication must be stored out of the sight and reach of children.

Disposal Rules

Unused or expired Vellios must not be discarded in household trash or poured down a drain (wastewater). Patients should use a medicine take-back program or consult with a local pharmacy or waste disposal company for guidance on proper handling and discarding of the product.

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

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