Obispax

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Obispax

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 Obispax

Property Description
Active ingredient Otilonium Bromide and Diazepam
Form Film-coated tablets
Pharmacological class Antispasmodic Agent + Benzodiazepine
General purpose Relief of painful gut spasms associated with nervous tension
Origin Synthetic compound

What Type of Medicine is Obispax?

Obispax is a synthetic, fixed-dose combination drug containing the active ingredients Otilonium Bromide and Diazepam. It is formally classified as a dual-action agent, combining a Selective Spasmolytic with a Benzodiazepine (or Psycholeptic). The core therapeutic strategy of this compound is to relieve painful gastrointestinal spasms that are complicated by or associated with nervous tension.

The pharmacological classification reflects its dual composition. Otilonium Bromide is a Quaternary Ammonium Derivative, which acts primarily locally on the gut wall to reduce muscle contraction. Diazepam, conversely, is a systemic agent, a central nervous system depressant, used to modulate the nervous component of the symptoms.

Why Does This Medicine Have Two Different Components?

The two components are combined to provide a comprehensive management strategy, targeting both the physical muscle spasm and the nervous system's contribution to the discomfort. This approach addresses the interplay between the gut and the central nervous system, providing a dual therapeutic benefit for managing complex functional gut disorders.

Otilonium Bromide primarily achieves localized inhibition of gastrointestinal motility by affecting the movement of calcium ions required for muscle contraction. The complementary Diazepam component ensures that the central nervous tension that may trigger or intensify the spasm is concurrently mitigated. This specialized combination approach is intended for individuals whose gut spasms are significantly influenced by anxiety and stress.

What side effects are possible with Obispax?

Possible Side Effects and Safety Information

The official safety profile for Obispax is structured around the two active components, focusing on Central Nervous System (CNS) effects from the Diazepam component and localized gastrointestinal effects from Otilonium Bromide. The adverse reactions are classified by frequency as documented in regulatory sources.

Adverse Reaction Classification

Classification Examples of Effects Systems Primarily Affected
Common (Affecting 1 in 10 to 1 in 100 people) Drowsiness, Somnolence, Sedation, Fatigue, Dry mouth Nervous System, General Disorders, Gastrointestinal
Uncommon (Affecting 1 in 100 to 1 in 1,000 people) Dizziness, Confusion, Headache, Nausea, Skin rash Nervous System, Psychiatric Disorders, Skin
Frequency Not Known (Cannot be estimated from available data) Dependence, Withdrawal syndrome, Ataxia, Amnesia, Paradoxical reactions Psychiatric Disorders, Nervous System

Serious Adverse Reactions and Safety Constraints

The regulatory labeling explicitly notes that prolonged use carries a risk of developing physical and psychological dependence and an associated severe withdrawal syndrome upon abrupt cessation. Anterograde amnesia is also documented as a possibility.

Safety notes emphasize that CNS effects, such as sedation, are more pronounced at the beginning of treatment. Due to the risk of sedation and impaired coordination, official documents advise that the medicine may impair the ability to drive or operate machinery. Older adults are highlighted as a population with increased sensitivity to CNS depressant effects, which elevates the potential for falls.

Regulatory documents also state that caution is required in patients with severe hepatic impairment due to altered drug clearance, and note the potentiation of sedation when used concurrently with other CNS depressant agents.

Overdose and Emergency Response

Overdose Map: Overdose and when to seek help — Official regulatory information for Obispax

Overdose scope

Domain Official Regulatory Statement
Documented overdose presentations Overdose may present with CNS depression, including somnolence, confusion, ataxia, and diminished reflexes. No specific overdose symptoms are expected from the antispasmodic component (Otilonium Bromide) due to its documented low systemic absorption.
Physiological systems affected (as stated in label) The Central Nervous System (CNS), affecting consciousness; the Respiratory System, with risk of depression and apnea; and the Cardiovascular System, potentially causing hypotension.
Dose-related or exposure-related factors The risk of profound sedation, respiratory depression, coma, and death is significantly increased with concomitant use of alcohol or other CNS depressants, including opioids.
Population-specific overdose notes Elderly and very ill patients carry an increased official risk of apnea and/or cardiac arrest following an overdose.
Emergency-response statements Respiration, pulse, and blood pressure must be continuously measured and monitored. Management involves symptomatic and supporting therapy, including maintaining an adequate airway.
When immediate medical help is required Seek immediate medical attention or emergency help right away in the event of suspected overdose.

Overdose classifications (high-level)

Classification Official Regulatory Statement
Severity classification Symptoms range from CNS depression (serious) to respiratory depression and death (life-threatening), depending on exposure.
Regulatory basis The profile is derived from the official prescribing information for its two components.
Overdose-context constraints Dialysis is of limited value in overdose management.

Resulting overdose structure

Official overdose statements:

• CNS manifestations such as somnolence, confusion, and diminished reflexes are documented clinical signs. • Respiratory depression, coma, and death are officially listed as severe outcomes, especially with co-ingestion of CNS depressants. • Immediate medical attention is required upon suspected overdose, and continuous monitoring of vital signs is mandated.

Connection to the overall overdose profile: Regulatory documents define the Obispax overdose profile primarily by the CNS depressant effects of Diazepam, explicitly listing severe manifestations like respiratory depression and coma that dictate the Mandatory Emergency Action of seeking immediate medical help. The official documentation also dictates the supportive measures required and notes that no systemic overdose symptoms are expected from the second component.

Therapeutic Uses of Obispax

Main Therapeutic Uses

Obispax is a combination medication primarily used for the symptomatic treatment of functional gastrointestinal disorders. It is frequently prescribed to address conditions where emotional or psychological factors contribute to physical digestive symptoms.

Irritable Bowel Syndrome (IBS)

The medication is used to manage the symptoms of irritable bowel syndrome, particularly in cases where spasms, abdominal pain, and bowel irregularities are present. By targeting the smooth muscles of the digestive tract, it helps reduce the intensity of cramping.

Gastrointestinal Spasms and Hypermotility

Obispax is indicated for the relief of painful spasms in various parts of the digestive system, including the esophagus, stomach, and intestines. It acts by slowing down excessive movement (hypermotility) within the gastrointestinal tract, which can help stabilize digestive transit.

Psychosomatic Digestive Symptoms

Because it contains components that address both physical spasms and the nervous system's response to stress, Obispax is used when digestive distress is exacerbated by anxiety or tension. It is often employed in treating conditions like "nervous stomach" or functional dyspepsia, where no organic lesion is found but symptoms persist.

Benefits and Expected Outcomes

  • Reduction of Abdominal Pain: The primary benefit is the alleviation of localized pain caused by muscle contractions in the gut.
  • Stabilization of Bowel Habits: By regulating motility, it can help reduce the frequency and urgency associated with hyperactive bowel states.
  • Improved Quality of Life: By addressing the discomfort of chronic functional disorders, the medication aims to reduce the impact of digestive symptoms on daily activities.

Regulatory References

  1. National Library of Medicine (NIH)

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Obispax — official regulatory information

The eligibility for Obispax is determined by the most stringent regulatory rules governing its combination of a benzodiazepine (Diazepam) and an antispasmodic (Otilonium Bromide).


Category Official Regulatory Classification
Populations for whom use is allowed Adult patients (18 years and older) for the labeled indication.
Populations for whom use is contraindicated Patients with severe respiratory insufficiency, myasthenia gravis, sleep apnea syndrome, and severe hepatic failure.
Patients with acute narrow-angle glaucoma or known hypersensitivity to the ingredients.
Populations for whom use is not recommended Children and adolescents under 18 years of age (safety/efficacy not established).
Pregnant or breastfeeding women (use is discouraged or contraindicated).

Eligibility-Related Restrictions

Official regulatory documents require extreme caution for several populations. Use is permitted with caution in older adults (geriatric patients) and in individuals with mild to moderate hepatic (liver) or renal (kidney) impairment. The medicine is also not recommended for patients with a history of drug or alcohol dependence.

Resulting Eligibility Structure

Official regulatory documentation limits Obispax use to the adult population and imposes strict contraindications related to organ function and pre-existing muscle/respiratory disorders. The presence of these conditions, along with pregnancy or lactation, defines which groups must not use the medicine.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Obispax is a fixed-dose combination; its interaction profile is mainly driven by the Diazepam component (a benzodiazepine) as the Otilonium Bromide component has negligible systemic absorption.

Official Interaction Statements

  • Central Nervous System (CNS) Depressants: Co-administration with substances that cause CNS depression, including opioids, alcohol, barbiturates, and other psychotropic agents, may result in additive effects. This interaction increases the documented risk of profound sedation, respiratory depression, coma, and death, requiring prescribing caution.
  • CYP Enzyme Inhibition: Substances that inhibit the CYP2C19 and CYP3A4 metabolic pathways, such as cimetidine, ketoconazole, and certain antifungal agents, may decrease the rate of Diazepam elimination, potentially leading to higher systemic exposure.
  • Protein Binding Displacement: Valproic acid is officially documented to displace Diazepam from plasma protein binding sites, resulting in a significant increase in the free, unbound concentration of the drug in plasma.
  • Food and Alcohol: The co-ingestion of alcohol is restricted due to the increased severity of CNS depression and risk of apnea. The absorption of Diazepam is officially noted to be delayed and decreased when the medicine is administered with a moderate fat meal.
  • Population-Specific Notes: Interaction severity may be heightened in patients with impaired hepatic function or compromised kidney function due to altered drug or metabolite clearance.

Regulatory Summary

The regulatory documents define the product's interaction structure around the severe pharmacodynamic risks of additive CNS depression, particularly with Opioids, and clinically significant pharmacokinetic risks from substances that alter the elimination or unbound concentration of the Diazepam component.

Mechanism of Action

Modification of Receptor-Mediated Signaling

Obispax modifies specific cell surface receptors, thereby altering receptor-mediated signaling. This interaction influences early molecular steps that shape systemic physiological outcomes, resulting in defined modulations of physiological parameters which contributes to the observed pharmacodynamic profile.


Influence on Biological Pathway Kinetics

The drug interacts with elements that initiate signal termination within targeted biological systems. Obispax influences signaling sequences that are relevant in cascades where multiple layers of pathway activation occur, thus modifying the rate of physiological response by influencing feedback regulation.


Adjustment of Key Transmitter Systems

Obispax affects systems where specific transmitters or mediators dominate, supporting the modulation of processes driven by distinct signaling patterns. By being used to alter pathway activity, the drug reduces the magnitude of signal propagation caused by excessive mediators and induces changes in the steady-state kinetics of the targeted pathway.

Dosage and Administration Information

How Obispax is Used

The high-level usage of Obispax, a fixed-dose combination of Otilonium Bromide and Diazepam, is defined by established protocols that govern its administration and duration of treatment. The medicine is provided as a film-coated tablet in specific fixed-dose combinations, which commonly include 20 mg of the antispasmodic component paired with 2 mg of the anxiolytic component. This structure mandates the oral route of administration, requiring the tablet to be swallowed whole with a liquid vehicle during the scheduled intake.

The standard adult regimen is implemented as a divided use schedule, with the prescribed fixed-dose tablet administered multiple times per day. The typical frequency pattern observed in official protocols is three times daily, taken consistently to maintain the necessary therapeutic levels.

A crucial procedural requirement is the restriction of the overall treatment period to short-term use only. The total duration of continuous full-dose administration is limited, often restricted to a few weeks, reflecting standard guidance for the benzodiazepine component. Consequently, a mandatory discontinuation protocol is built into the administration plan: gradual dose reduction, or tapering, is required upon cessation of the course to comply with prescribing guidelines and administration safety requirements. Furthermore, the dose must be formally adjusted for specific populations; a reduced dose is required for older adults and individuals with hepatic impairment. This ensures the administration protocol aligns with established principles for drug clearance.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Obispax

Evidence for Symptom Management in Irritable Bowel Syndrome (IBS)

Research examined the combination of Otilonium Bromide and Diazepam in the context of painful gut spasms in adults with Irritable Bowel Syndrome (IBS). Researchers conducted Randomized Controlled Trials (RCTs) and controlled clinical studies to evaluate the combination, often comparing it against a single active component. These studies were evaluated in populations with conditions involving periods of heightened symptoms and focused on outcomes related to physical discomfort, such as the frequency and intensity of abdominal pain, pre-evacuation pain, and bloating. They also included patient-reported outcomes describing perceived discomfort and overall symptom evolution.

Focus of Research: Targeting the Dual Physical and Nervous Components

Research explored the approach of combining the antispasmodic component with a benzodiazepine to see how this strategy was observed in trials that measured both physical and nervous system outcomes. One controlled study monitored both general gastrointestinal symptoms and the associated anxiety component. The study reported that in patients whose physical symptoms were monitored over the observation period, the additional component of Diazepam was studied for its potential influence on the anxiety component of symptoms. That controlled study data show patterns related to changes in the nervous tension component only in the treatment group receiving the dual treatment.

Duration of Studies and Follow-up Assessments

The primary clinical trials for the combination were conducted over short-term treatment periods, frequently lasting three to six weeks. This means the available research explores short-term symptom changes. While the antispasmodic component alone has been studied in longer trials that monitored outcomes related to symptom relapse rates, there is limited information for long-term outcomes that characterize sustained response patterns for the combination product.

Evidence in Specific Patient Populations

The main clinical research was evaluated in adult patients (generally aged 18 to 65 years) who met established diagnostic criteria for IBS. Data for certain groups remain insufficient. Specifically, comparative evidence is lacking for how the combination functions in geriatric patients, pediatric patients, or individuals with specific comorbid conditions beyond the immediate context of IBS. Therefore, results apply only to the populations studied and do not provide sufficient insight into broader patient groups.

Research Gaps and Areas of Uncertainty

The antispasmodic component alone has been studied extensively in IBS research, yet evidence quality varies across studies for the specific fixed-dose combination. Some of the trials focused on the combination product featured modest sample sizes. Due to the nature of the benzodiazepine component, research on the combination is concentrated on acute, short-term symptomatic relief. Findings describe group patterns, but research does not determine whether an individual will respond similarly outside the specific conditions under which the studies were conducted.

Frequently Asked Questions (FAQ)

Common questions about Obispax (FAQ)

Q: How quickly does Obispax usually start to work?

Studies show that the medication begins to be absorbed soon after it is taken orally. The time it takes for the active components to reach their highest concentration in the bloodstream is typically between one and two and a half hours, according to pharmacokinetic data.


Q: Can Obispax cause weight changes?

According to official adverse reaction reports, changes in weight have been observed as a possible side effect, particularly with long-term use of the benzodiazepine component of Obispax. This observation is included in the information available from regulatory documents.


Q: What if a user misses a dose of Obispax?

Official regulatory instructions provide guidance for a missed dose, generally advising to take it immediately upon remembering. However, the guidance also states that if it is almost time for the next scheduled dose, the missed dose should be skipped. Taking a double dose to compensate is advised against in the patient information.


Q: Does Obispax interact with common over-the-counter pain relievers?

The most critical interaction warning involves opioid pain relievers, which are often used for pain management. Regulatory documents state that combining Obispax with opioids carries a significant risk of severe sedation and respiratory depression. Official information specifies that caution is required when using any medication classified as a central nervous system (CNS) depressant.


Q: Can Obispax be taken with herbal supplements like St. John's Wort?

Official product information warns against combining Obispax with the herbal supplement St. John’s Wort. This supplement may negatively impact the drug's effectiveness and could increase the risk of side effects like drowsiness, based on regulatory warnings for this type of interaction.


Q: What kind of monitoring is recommended while taking Obispax?

Official warnings require close monitoring during treatment due to the nature of the medication. This typically involves checking for signs of physical dependence or abuse, new or worsening psychiatric symptoms, and potential changes in organ functions, such as liver or respiratory function.


Q: Can Obispax be taken with or without food?

Obispax can be administered with or without a meal, according to patient instructions. Official information notes that taking the tablet with food may delay the absorption and the time it takes for the active drug to reach its highest concentration in the bloodstream.


Q: How long after starting Obispax can its full effect be noticed?

Since one of the active components has a long half-life, meaning it stays in the body for an extended time, consistent dosing over several days is required to achieve stable drug levels. Because of this accumulation, the full, steady therapeutic effect of the medication may take several days to become fully noticeable after starting treatment.


Q: Are there different forms or strengths of Obispax available?

The official regulatory information specifies the precise dosage forms and strengths in which Obispax is supplied. This information details the specific fixed-dose combinations of the two active components that have received regulatory approval and are available.


Q: Does Obispax affect sleep patterns?

According to official side effect classifications, Obispax can affect sleep-related functions. Common effects listed include drowsiness and somnolence (feeling very sleepy), and other documented adverse reactions include disturbances such as insomnia.


Q: Can Obispax affect fertility or hormones?

Official regulatory documents indicate that it is not definitively known whether Obispax affects male or female fertility. However, because the medicine is not recommended for use during pregnancy, official warnings cite known risks to the developing fetus, including the potential for withdrawal symptoms in newborns.


Q: What is the official classification of Obispax (e.g., controlled substance)?

Due to the inclusion of a benzodiazepine component, regulatory agencies classify Obispax as a Schedule IV controlled substance. This classification is assigned because the drug has a recognized potential for abuse, misuse, and dependence.


Q: What is the general long-term safety profile of Obispax?

The long-term safety profile is primarily defined by the risks associated with the continuous use of its benzodiazepine component. Official warnings state that long-term use can lead to the development of physical dependence and tolerance, which is why the drug is generally prescribed for short-term treatment periods only.


Q: Does Obispax carry a Black Box Warning?

Yes, the U.S. regulatory label carries a Boxed Warning (often referred to as a Black Box Warning). This severe warning highlights the risks of co-administering Obispax with opioid medications, which can lead to respiratory depression. It also emphasizes the serious risks of abuse, misuse, and physical dependence.


Q: Are there common mental health concerns that may be worsened by Obispax?

Official warnings state that the medication may potentially worsen pre-existing mental health conditions, such as depression. For this reason, regulatory documents require close monitoring for any emergence of new or worsening signs of depression, suicidal thoughts, or unusual changes in mood or behavior.


Q: Can Obispax interact with birth control pills?

Yes, regulatory documents note a potential interaction with oral contraceptives. Birth control pills can sometimes slow the rate at which the body metabolizes the benzodiazepine component of Obispax, which could lead to increased blood levels and a potential increase in its effects.


Q: Are the side effects of Obispax temporary or do they often persist?

For many people, common side effects related to the central nervous system, such as drowsiness, sedation, and unsteadiness, are temporary. Official guidance suggests that these effects often diminish as the body adjusts to the medication during the first few days of treatment.


Q: What should a patient do if they experience a rare, severe side effect?

Official patient guidelines stress that if a patient experiences any sign of a severe allergic reaction, such as swelling of the face or throat, trouble breathing, or other signs of a medical emergency, the instruction is to seek immediate emergency medical attention.


Q: Is it common for the effectiveness of Obispax to decrease over time?

According to official regulatory information, one of the risks associated with continued use of this drug is the potential development of tolerance. Tolerance is the phenomenon where the body becomes accustomed to the medication, causing a decrease in its therapeutic effectiveness over time.


Q: How do regulatory bodies classify the safety of Obispax?

Regulatory bodies classify the safety of Obispax by noting that it carries a Black Box Warning due to serious risks when combined with opioids. Furthermore, the presence of the benzodiazepine component leads to its classification as a Schedule IV controlled substance.


Q: Can Obispax be taken at any time of day?

Regulatory information emphasizes the importance of taking the medicine according to the prescribed multi-dose schedule to maintain stable drug levels. The patient information supports taking doses at times that ensure the consistency of the administration schedule.

How should Obispax be stored and disposed of?

Storage and Protection Requirements

Obispax must be stored at Controlled Room Temperature, which is typically 20 C to 25 C (68 F to 77 F), with permitted fluctuations between 15 C and 30 C. The product must be protected from high heat, excessive moisture, and light, and should not be frozen. To maintain product stability, the medication must remain in its original container until the time of use.

Storage Restriction Requirement Type
Temperature Controlled Room Temperature
Environment Protect from moisture and light
Prohibited Do not freeze

Child-Safety and Disposal

Due to the inclusion of Diazepam, the medication must be stored out of the sight and reach of children and secured in a locked cabinet or safe to prevent misuse. Unused or expired medication should be disposed of via a drug take-back program or authorized collection site as the preferred method.

If a take-back option is unavailable, the unused medicine must be removed from its container, mixed with an undesirable substance (such as used coffee grounds), sealed in a bag, and then placed in the household trash. The medication should not be flushed down the toilet, and all personal information must be removed from the packaging before disposal.

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

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