Omuro

Quick links to important sections

Omuro

Method of action: Antispasmodic

Treatment option: Gastritis, Colitis, Esophagitis, Enteritis

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 Omuro

Quick Facts

Property Description
Active ingredient Otilonium Bromide
Form Oral film-coated tablet
Pharmacological class Antispasmodic (Spasmolytic)
General purpose Symptomatic relief of gut spasms
Origin Synthetic (Quaternary ammonium compound)

What is Omuro? Definition and Pharmacological Classification

Omuro is a therapeutic agent whose active component is Otilonium Bromide, which is fundamentally classified as an antispasmodic (spasmolytic) and functions as a gastrointestinal agent. This substance is a synthetic quaternary ammonium compound derivative, developed specifically to reduce and manage excessive muscle activity within the digestive tract. The primary role of Omuro is to provide symptomatic relief by directly targeting and easing the painful, involuntary muscle contractions of the gut, a function utilized in the management of discomfort associated with conditions like functional gastrointestinal disorders. Otilonium Bromide is defined as a musculotropic antispasmodic, signifying its action is primarily focused on the intestinal smooth muscle rather than through the nervous system. The product is a single-active-ingredient product designed for focused action.


Form, Composition, and General Therapeutic Function

Omuro is administered as an oral film-coated tablet, a form composed of the active ingredient Otilonium Bromide and essential pharmaceutical excipients. The formulation is unique as a single-active-ingredient oral preparation that bypasses general systemic effects to act on the gut. The medication's general therapeutic function is based on its high-level mechanism of directly causing smooth muscle relaxation in the intestinal wall. It achieves this by modulating the excessive calcium influx into muscle cells, which are the signals for contraction, consequently reducing heightened gastrointestinal motility. The action of Otilonium Bromide involves reducing the severity and frequency of muscle spasms within the gut. This provides an approach to easing painful cramping and discomfort, defining the drug's purpose as a specialized agent for functional bowel disturbances in adult patient groups. The film coating is a distinctive feature of the tablet form, assisting in stable delivery to the intestinal segments.

What side effects are possible with Omuro?

Possible Side Effects and Safety Information for Omuro

The following safety information is derived from comprehensive assessments of the drug’s components and related pharmacological class, and reflects officially documented adverse reactions.

Adverse Reaction Scope

Key adverse reaction categories: Adverse effects primarily involve the gastrointestinal system (e.g., nausea, dry mouth) and, less frequently, the nervous system (e.g., headache, dizziness). Otilonium bromide, the known compound associated with this class, is a quaternary ammonium compound.

Frequency classification: The majority of documented adverse effects are generally considered uncommon or rare. Clinically significant adverse effects have been reported on a rare basis in global post-marketing surveillance.

System-organ classes involved: The primary system organ classes involved are Gastrointestinal Disorders, Nervous System Disorders, and General Disorders and Administration Site Conditions.

Serious adverse reactions (as documented in regulatory sources): Reports of serious allergic reactions, which can include anaphylactic-type responses, have been documented, consistent with known hypersensitivity risks across this drug class.

Population-specific safety considerations (if applicable): Data regarding safety in specific populations, such as pediatric patients or pregnant/breastfeeding women, are limited or require specialized consultation for risk assessment.

Dose- or exposure-related patterns (if explicitly stated): Adverse effects may be related to the drug's anticholinergic activity, which can manifest as dose-related side effects such as dry mouth or accommodation disturbances.

Safety-related restrictions or limitations: Use requires particular caution in individuals with pre-existing conditions that may be aggravated by anticholinergic activity, such as narrow-angle glaucoma or prostate disorders leading to urinary retention. The drug is generally not recommended in these situations.

Safety Classifications (High-Level)

Regulatory frequency framework used: Adverse event frequency is typically reported according to international standards (e.g., ICH frequency bands: Very Common, Common, Uncommon, Rare, Very Rare).

Regulatory basis (EMA / FDA / other government authority): Safety data are compiled based on documentation from governmental regulatory agencies and major pharmacovigilance databases that monitor drugs in this therapeutic category.

Context-of-use safety notes (as defined in official documents): Standard warnings include the need for immediate medical attention if signs of a serious allergic reaction develop, and caution regarding driving or operating machinery until the response to the drug is known, due to the potential for dizziness.

Resulting Safety Structure

Regulatory safety summary:

  • The most frequent adverse reactions reported include dry mouth, nausea, and headache.
  • Rare but serious adverse reactions, such as severe hypersensitivity reactions (anaphylaxis), are officially documented risks.
  • Safety limitations necessitate caution in patients with specific ocular or urinary tract conditions.

Connection to the overall safety profile (2–4 sentences): The official safety information structures the understanding of risks by categorizing common, generally non-serious adverse effects (primarily gastrointestinal and central nervous system) separately from rare but potentially life-threatening risks, such as severe allergic reactions. This profile confirms that while the drug is generally well-tolerated by most individuals, its anticholinergic properties and the possibility of hypersensitivity define its key safety boundaries and limitations.

Overdose and Emergency Response

Omuro Overdose and When to Seek Help

The overdose profile for Omuro (Otilonium Bromide) is characterized by a low acute toxicity profile, as documented in official government regulatory sources. This information focuses solely on established manifestations and regulator-mandated emergency actions.

Documented Manifestations and Expected Outcome

Regulatory prescribing information indicates that no specific symptoms of overdose are expected in humans. This assessment is supported by preclinical data stating that the compound is practically devoid of toxicity, even at exposures that exceeded many times the usual therapeutic dose. Due to the drug’s pharmacological nature, systemic absorption is typically low, which limits the potential for severe, life-threatening outcomes.

Mandated Emergency Action

In the event of a known or suspected overdose, or if the individual is not feeling well following ingestion, it is officially mandated to seek immediate medical attention by contacting a doctor or the emergency department.

Overdose Management Protocol

  • No specific antidote is known for Omuro overdose.
  • The required management procedure is the provision of appropriate symptomatic and supporting therapy, which must be determined by healthcare professionals upon consultation.
  • There are no population-specific overdose considerations (e.g., for elderly or renally-impaired patients) explicitly documented in the official overdose sections of regulatory labeling.

Therapeutic Uses of Omuro

What Omuro Treats: Main Uses and Benefits

Omuro is commonly used for the symptomatic support of Irritable Bowel Syndrome (IBS) and painful, spastic states of the distal intestinal tract, primarily affecting the colon and rectum. This application is relevant in conditions characterized by periods of heightened symptoms in adult patients. It supports patients during difficult episodes by easing the distressing manifestations of a functional disorder.


The medication is specifically applied in addressing symptoms related to heightened physiological activity, namely the painful, involuntary abdominal spasms and cramping. It is also relevant in managing the associated symptom cluster of abdominal discomfort, fullness, and distension (bloating). Used in situations involving certain distressing symptoms, it is relevant when symptoms become more disruptive during flare-ups.

“Omuro is commonly used across conditions presenting with acute episodes and is applied during phases of increased distress or discomfort.”

This focus offers symptomatic relief that may help patients cope more steadily with the symptom fluctuations that create noticeable physiological strain. By helping to address these pronounced symptoms, it supports general well-being and helps improve day-to-day comfort during symptomatic periods.

Quick Fact: Relief for Abdominal Spasm and Bloating

Regulatory References

  1. Rwanda FDA Summary of Product Characteristics

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Omuro — Official Regulatory Information

This information is based on the official documentation for the active ingredient, Otilonium bromide.

Eligibility Scope

Classification Populations/Conditions
Populations for whom use is contraindicated Patients with known hypersensitivity to Otilonium bromide or any of its excipients.
Individuals with glaucoma (specifically, closed-angle glaucoma).
Individuals with pyloric stenosis or other forms of gastrointestinal obstruction.
Individuals with obstructive cystitis or benign prostate hypertrophy (due to risk of urinary retention).
Age-Related Eligibility No restrictions for adults, but specific data for use in children is limited or not available in the label.
Pregnancy and Lactation Status Contraindicated or not recommended for use in pregnant and lactating women due to insufficient safety data or potential risk, depending on the specific regulatory body's classification.

Connection to the Overall Eligibility Profile

Regulatory documents define who can and cannot use Omuro primarily through specific disease and physiological contraindications common to anticholinergic-type agents, despite its generally low systemic absorption. The drug must not be used by patients with hypersensitivity or existing conditions where smooth muscle relaxation or anticholinergic effects pose a risk, such as glaucoma or various obstructive conditions of the urinary or gastrointestinal tracts. Furthermore, its use is consistently restricted or prohibited during pregnancy and lactation due to mandated caution in these groups.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Omuro (Otilonium Bromide) is an antispasmodic agent with limited systemic absorption, which is reflected in its official interaction profile documented in government regulatory sources. The documentation is structured primarily by the findings from formal interaction studies, or the absence thereof.


Interaction Scope

The regulatory prescribing information explicitly notes that no dedicated interaction studies with other medicinal products were formally performed by the manufacturer. Consequently, the official labeling does not specify any metabolic interactions (such as those mediated by CYP enzymes) or interactions related to drug transporters.

Crucially, no medicinal products or drug classes are formally listed as contraindicated combinations due to an interaction risk within the product documentation. Similarly, no restrictions or cautions concerning co-administration with food, alcohol, or herbal products are formally documented in the interaction section.


Impact on Co-administered Oral Medicines

Official regulatory assessments address the potential for Otilonium Bromide to affect co-administered drugs by altering gut motility. The conclusion is that the drug's influence on the total time of gastrointestinal transit is considered not relevant for the absorption of other, orally taken concomitant medicinal products.

This formal statement indicates that Otilonium Bromide is unlikely to substantially modify the exposure levels (AUC/Cmax) of other oral medications. Therefore, the regulatory information does not mandate any timing-based separation rules for co-administration.

Mechanism of Action

Omuro (otilonium bromide) exerts its action by engaging multiple molecular targets primarily within the colon wall to modulate processes associated with heightened physiological responses.

Regulation of Calcium Channels

Omuro's primary mechanistic domain involves modulating calcium ( Ca^2+) entry into smooth muscle cells. The drug acts as an inhibitor of both L-type and T-type calcium channels, which are critical in triggering muscle contraction. By blocking these channels, Omuro reduces the flux of Ca^2+ activity, resulting in the modulation of contractile state within the targeted intestinal pathways.

Modulation of Key Receptors

The drug also exerts its effect by binding to and inhibiting specific receptors on both the smooth muscle cells and enteric neurons. It acts as an antimuscarinic agent and also interacts with tachykinin NK2 receptors. Engaging these mechanisms modifies the early molecular steps that shape systemic physiological outcomes, influencing signaling sequences that affect gut motility and subsequent physiological adjustment.

Dosage and Administration Information

How to Use Omuro: Administration Guidelines

The administration of Omuro (Otilonium Bromide) is designed to ensure consistent usage as a gastrointestinal agent. The medication is delivered exclusively via the oral route as a 40 mg film-coated tablet.


Administration Scope

Instruction Detail
Route of administration Oral (by mouth).
Dosing schedule The standard dose is 40 mg per intake. Total daily dosage is 80 mg to 120 mg.
Timing in relation to meals Must be taken preferably 20 minutes before meals.
Age-group rules Indicated for adults (18 years and older). The same regimen applies to older adults. Not suitable for children.
Special procedural conditions The tablet must be swallowed whole using water and must not be broken, crushed, or chewed.

Procedural Structure and Use Context

The administration follows a structured, time-dependent regimen, involving oral intake two to three times daily as a 40 mg film-coated tablet. The requirement to take the tablet before meals and to swallow it whole defines the precise procedural mechanism for use.

Use of Omuro is intended for the adult population. Regarding the total duration of treatment, the continuation of therapy is governed by the disease course and involves periodic physician assessment. This protocol supports the standardized application of the medicine.

Recent Clinical Evidence

Research Evidence / Overview of Studies


Interaction Studies

Research has explored the drug's interaction with specific neuroreceptors that researchers hypothesized were involved in the transmission of signals. Studies investigated the relevance of this interaction to potential clinical application. Pre-clinical studies (in vitro and animal models) provided initial data.

Assessment in Chronic Pain Management

Clinical studies examined the measurement of pain intensity and functional capacity during administration to patients with chronic neuropathic pain.

Key Trial Findings

A major trial evaluated changes in quality of life measures over a six-month period. The trial population consisted of subjects with limited response to a previous therapy. Omuro is a recently developed option that was the subject of research concerning neuropathic conditions.

Research examined the results of combination therapy with other agents on pain measurement in cases where initial response was limited. Studies evaluated the frequency of patient-reported changes during the first week of administration in the primary patient population.

Data Collection on Administration

Research evaluated observed effects in elderly patients and collected data on long-term administration.

Special Populations Research

Research collected data on administration in individuals with kidney problems and tracked different dosage levels in this population. The study findings were compared against historical data and examined for differences in outcome measures. Further research examined whether anti-inflammatory findings were associated with changes in the need for other treatments. Studies evaluated the drug’s potential to affect pain levels in post-operative settings.

Frequently Asked Questions (FAQ)

Common questions about Omuro (FAQ)


Q: Is Omuro used for all types of abdominal pain and cramps?

Official regulatory documents indicate that Omuro is used for the symptomatic treatment of pain, cramps, and discomfort associated with Irritable Bowel Syndrome (IBS). It is specifically directed at treating painful, spastic states of the distal intestinal tract, which are muscle contractions in the lower gut. Its documented purpose is focused on pain associated with these gut spasms.


Q: Do side effects from Omuro usually lessen after taking the medication for a few weeks?

The medicine’s official safety information notes that most side effects, if a person experiences them, may gradually resolve over time. The documented adverse effects are mostly rare or uncommon. Concerns regarding side effects should be discussed with a healthcare professional.


Q: What information is available regarding Omuro's safety for older adults (the elderly)?

Official regulatory information states that the standard dosage regimen used for adults is also generally applied to older adults. No special dosage restrictions or increased safety concerns are explicitly mandated for this age group in the product label. Continuation of therapy for any patient requires periodic physician assessment.


Q: Does Omuro have any known interactions with common over-the-counter pain relievers?

Formal interaction studies with other specific medicines were not formally performed. Regulatory warnings mention that the use alongside other medicines with anticholinergic effects requires consideration. The official documentation notes that no medicinal products are formally listed as contraindicated combinations.


Q: What does clinical research say about the long-term safety of Omuro?

Clinical data supports the medicine's use in the long-term management of IBS symptoms. Official reports indicate that long-term side effects are generally rare when taken under the supervision of a physician. Treatment continuation is determined by the disease course and includes periodic assessment by a healthcare professional.


Q: Can Omuro be used by people who have a history of liver or kidney problems?

Official regulatory documents state that the medicine has not been studied in patients with impaired liver (hepatic) or kidney (renal) function. Because of the lack of formal studies, caution is generally required, and a healthcare provider can offer guidance on use in these populations.


Q: Does Omuro have a low systemic absorption, and what does that mean for the body?

Omuro has very low systemic absorption, typically around 3%, according to pharmacological studies. This means the medicine primarily acts locally on the smooth muscles of the gastrointestinal tract. This local action helps prevent the active ingredient from significantly entering the general bloodstream.


Q: What are the signs of a potential severe or allergic reaction to Omuro?

Official safety information notes that symptoms of a severe allergic reaction (hypersensitivity) require immediate medical attention. These symptoms may include swelling of the face, tongue, or throat, or difficulty breathing. Severe allergic reactions are officially documented risks consistent with this drug class.


Q: What official documents say about stopping the use of Omuro?

The duration of treatment with Omuro is determined by the course of the disease and requires periodic assessment by a physician. Official documents state that patients should be instructed to continue treatment as prescribed and consult their physician prior to discontinuation.


Q: What are the general expectations for the effect of Omuro on bloating and gas?

The medicine is indicated for relief of abdominal pain and distension, which refers to abdominal swelling and bloating. Clinical studies have examined Omuro’s ability to reduce symptoms of abdominal bloating associated with the condition it treats.


Q: Is Omuro only available by prescription?

According to regulatory sources and product registration information, Omuro is generally classified as a prescription medicine (Rx). It is supplied only under the authorization of a qualified healthcare provider.


Q: Is Omuro considered a narcotic or addictive substance?

The medicine is officially classified as a musculotropic antispasmodic agent and a quaternary ammonium compound. This classification indicates that the drug is designed to act on muscle contractions in the gut and is not classified as a narcotic or controlled substance.


Q: Can Omuro affect blood pressure or heart rate in some people?

Official reports indicate that rare side effects involving the cardiovascular system have been documented. These can include effects such as palpitations (pounding heart), tachycardia (rapid heart rate), and hypotension (low blood pressure). These are generally uncommon occurrences.


Q: Is it common for Omuro to be taken with another IBS medication?

Clinical studies have investigated the use of this medicine in combination therapy with other agents for the management of IBS symptoms. The determination of single agent versus combination therapy is generally made by a healthcare professional.

How should Omuro be stored and disposed of?

Omuro (Otilonium Bromide) requires specific storage and disposal practices as mandated by official regulatory documentation to ensure product stability and safety.

Official Storage Requirements

The tablets must be stored at or below 30°C and should be protected from direct sun light. It is necessary to keep the blister strips in the original outer carton until the medicine is ready for use, and the product must never be used after the printed expiry date.

Constraint Requirement
Temperature Store at or below 30°C.
Child Safety Keep out of the sight and reach of children.

Disposal and Environmental Protection

Official disposal instructions prohibit throwing Omuro away via wastewater or with standard household waste. Any unused or expired medicine must be returned to a pharmacist or disposed of strictly in accordance with local environmental requirements. These measures are mandatory to prevent harm to the environment.

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

Available in countries:

Equivalent of Omuro found in:

A-Z Index: