Bigetric

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Bigetric

Method of action: Antiulcer, Laxative

Treatment option:

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 Bigetric

Bigetric is a fixed-dose combination drug classified as a multi-component gastrointestinal agent, designed for administration via the oral route.

Property Description
Active ingredients Domperidone, Simethicone
Form Tablet, Capsule, Oral Suspension
Pharmacological class Prokinetic Agent and Antiflatulent
Common purpose Relieves feelings of fullness and bloating
Origin Synthetic Organic and Silicon Compound

What Type of Medicine is Bigetric?

Bigetric is defined by its dual identity, functioning simultaneously as a prokinetic agent and an antiflatulent, a combination typically provided in various oral dosage forms. Its composition is a blend of a synthetic organic compound, Domperidone, and a silicon compound, Simethicone, positioning it as a specialized solution for functional digestive discomfort. The combination is widely clinically recognized for addressing complex upper GI discomfort. This indicates that the fixed combination is recognized for its simultaneous management of the digestive system's movement and gas-related issues.

Dual-Component Composition: Domperidone and Simethicone

The drug's active ingredients are Domperidone and Simethicone, which define its distinct pharmacological properties. Domperidone is a dopamine receptor antagonist that contributes the prokinetic component by gently stimulating muscle contractions in the upper digestive tract. Conversely, Simethicone is an antifoaming agent that constitutes the antiflatulent component, working non-systemically to physically break down gas bubbles. This confirms that Simethicone acts locally in the gut to reduce painful gas and bloating. This unique pairing allows for an approach tailored to symptoms like post-meal fullness and associated gaseous distention, distinguishing it from single-agent therapies.

General Purpose and Mechanism Summary

The general purpose of Bigetric is to promote comfort and efficiency in the upper digestive system by targeting two primary sources of distress. Its function involves two high-level principles: the restoration of natural movement of stomach contents and the effective gas bubble dissolution in the intestine. This dual-action approach is pharmacologically confirmed to offer comprehensive relief. By facilitating a more timely transit of material and reducing the physical volume of internal gas, the medicine generally helps relieve sensations of bloating, fullness, and stomach discomfort.

Regulatory References

  1. NIH

What side effects are possible with Bigetric?

Possible Side Effects and Safety Information

The official safety profile of Bigetric, which includes the active component Domperidone, outlines adverse reactions and stringent safety constraints as defined by regulatory authorities.


Documented Adverse Reactions

Adverse reactions are classified by frequency, with the most common being dry mouth. Uncommon effects listed in regulatory documents include headache, drowsiness, anxiety, diarrhoea, and specific reproductive and breast disorders such as galactorrhoea (unusual production of breast milk) and menstrual irregularities. Rare reactions can include palpitations or an irregular heartbeat.


Serious Safety Considerations

The regulatory profile places a high emphasis on the potential for serious cardiac events. These rare, but clinically significant, adverse reactions include documented instances of QTc prolongation, ventricular arrhythmias, Torsade de Pointes, and the risk of sudden cardiac death. Furthermore, serious hypersensitivity reactions, such as anaphylaxis, are officially noted as possible.


Constraints and Special Populations

Official labeling mandates specific limitations, including the contraindication of Bigetric in patients with pre-existing heart conditions (such as QTc prolongation or congestive heart failure), significant electrolyte imbalances, or a prolactin-releasing pituitary tumor. The risk of serious cardiac events is officially noted as potentially higher in patients over 60 years old and when the medicine is used at higher doses or for a longer duration than specified. Use is also restricted in patients with moderate to severe hepatic (liver) impairment.

Overdose and Emergency Response

Overdose and when to seek help

The overdose profile for Bigetric is primarily defined by the systemic effects of its Domperidone component, as detailed in governmental regulatory information. Overdosage is documented to potentially cause Central Nervous System (CNS) effects such as somnolence (drowsiness), disorientation, and agitation. Motor disturbances, including extrapyramidal reactions (e.g., uncontrolled movements) and convulsion (seizure), are also noted.

A severe risk documented in official labeling is cardiotoxicity, which includes QT interval prolongation on an ECG, serious ventricular arrhythmias, and the potential for sudden cardiac death. Regulatory warnings state that this risk is higher in patients older than 60 years or those taking daily doses greater than 30 mg. Infants and children are noted as being more likely to experience extrapyramidal symptoms.

In the event of an overdose, patients must seek immediate medical attention straight away. Regulators mandate that ECG monitoring should be undertaken due to the risk of QT interval prolongation. No specific antidote is known, meaning management focuses on standard symptomatic and supportive treatment; the label may suggest measures such as gastric lavage or activated charcoal. If symptoms such as signs of cardiac arrhythmia, passing out, or trouble breathing occur, emergency services should be contacted immediately.

Overdose Management Summary

Classification Official Regulatory Statement
Severity Classification Overdose carries risk of life-threatening outcomes due to serious ventricular arrhythmias.
Monitoring Requirements ECG monitoring should be undertaken.
Management Steps Standard symptomatic and supportive treatment should be given immediately.

Therapeutic Uses of Bigetric

What Bigetric Treats: Main Uses and Benefits

Bigetric is generally used to provide focused symptomatic relief by managing specific clusters of discomfort associated with functional digestive issues, particularly those related to the upper gut.


Relief from Functional Dyspepsia and Fullness

This medication is commonly used to help with symptoms of functional dyspepsia, a condition characterized by periods of heightened symptoms such as feeling overly full (early satiety) and persistent post-meal fullness. Its therapeutic relevance is consistent with clinical assessments of its components.

The primary symptomatic relief it is relevant for easing includes manifestations associated with dysmotility-like dyspepsia, abdominal bloating, and nausea.

“The combined approach may assist with managing symptom clusters that may become intense or disruptive.”

It contributes to easing the overall symptom load and supports general well-being during periods of heightened symptoms.


Management of Bloating, Gas, and Nausea

Bigetric is applied in addressing recurrent or episodic manifestations involving gaseous distress. It is relevant for managing symptoms that interfere with daily comfort, such as painful abdominal bloating and general pressure. Furthermore, it plays a role in managing associated nausea and vomiting. By addressing the relevant symptomatic clusters, it provides supportive relief when symptoms become more noticeable, helping patients cope more steadily with disruptive digestive episodes.

Quick Fact: Relief for Combined Symptoms The medication is relevant in clinical settings that involve acute or unstable symptom patterns, offering assistance when fullness and gaseous pressure occur simultaneously.

Eligibility and Restrictions for Use

Who Can and Cannot Use Bigetric?

Regulatory documents strictly define the patient populations eligible for Bigetric (Domperidone/Simethicone) based on age, physiological status, and underlying health conditions. The most significant restrictions stem from the Domperidone component.

Contraindicated Populations (Must Not Use)

Bigetric is formally contraindicated and must not be used by individuals with certain pre-existing conditions, including known prolongation of the QTc interval or other underlying cardiac diseases such as congestive heart failure. It is also prohibited for patients with significant uncorrected electrolyte disturbances, moderate or severe hepatic impairment, and in the presence of gastro-intestinal hemorrhage, mechanical obstruction, or perforation

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Eligibility and Restrictions

Use is generally approved for adults and adolescents 12 years of age and older weighing 35 kg or more. The medicine is not recommended for children under 12 years or for individuals who are breastfeeding, as the drug is excreted in human milk. Conditional use is specified for patients older than 60 years (requiring caution) and those with severe renal impairment (requiring adjusted dosing frequency), as defined by official labeling.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents describe several interactions with other products that can alter Bigetric's exposure or have additive physiological effects. These interactions are classified as clinically significant and necessitate specific constraints.

Contraindicated Combinations

Co-administration of Bigetric is strictly forbidden (contraindicated) with Strong CYP3A4 Inducers (e.g., Rifampin) as this dramatically lowers Bigetric's plasma levels, leading to a loss of effectiveness. It is also contraindicated with Potent Pharmacodynamic Agents, such as nitrates, due to the documented risk of severe, life-threatening additive effects.

Pharmacokinetic and Pharmacodynamic Interactions

  • Exposure Modification: Strong CYP3A4 Inhibitors (e.g., Ketoconazole) significantly increase Bigetric's exposure and may require monitoring. Bigetric is also a moderate inhibitor of CYP2D6 and an inhibitor of P-glycoprotein (P-gp) and OATP transporters. This means co-administration with P-gp substrates (like Digoxin) or OATP substrates (like certain statins) increases the levels of those specific co-administered drugs.
  • Additive Effects: Combination with Other Muscarinic Antagonists increases the potential for additive anticholinergic effects.

Timing and Population-Specific Rules

To ensure proper absorption, Bigetric must be administered at least 2 hours before or 6 hours after certain antacids containing polyvalent cations. Regulatory data also indicates that the interaction severity with CYP3A4 inhibitors is higher in patients with Severe Renal or Hepatic Impairment, requiring special consideration of those population constraints.

Mechanism of Action

The mechanism of Bigetric is driven by the coordinated action of two distinct mechanistic domains: the peripheral modulation of upper gastrointestinal movement and the physical destabilization of trapped intraluminal gas.

Peripheral Modulation of Upper GI Motility

This domain covers the action of Domperidone, which functions as an antagonist at specific Dopamine D2 and D3 receptors in the gut wall. By blocking these receptors, the drug removes a natural inhibitory signal, thereby disinhibiting the cholinergic pathway and enhancing the force and coordination of smooth muscle contractions. The primary resulting physiological consequence is an accelerated gastric emptying rate and enhanced transit of contents.

Physical Clearance via Surface Tension Reduction

This domain addresses the non-systemic action of Simethicone, an inert substance that modifies the internal environment of the gut. Its mechanism involves significantly reducing the surface tension of the gas/liquid interface within the gastrointestinal lumen. This physical process causes numerous tiny, stable gas bubbles, often trapped in mucus, to coalesce into fewer, larger, and more mobile gas masses. These masses become physically mobilizable for expulsion, resulting in reduced intraluminal volume and pressure.

Dosage and Administration Information

Official Administration Guidelines for Bigetric

Bigetric (mirabegron extended-release tablet) is a prescription medicine taken orally once daily. Adherence to the prescribed dosage and administration method is required.

Administration Parameter Official Guideline (Adults)
Route of Administration Oral
Dosing Schedule Recommended starting dose is 25 mg once daily. Based on patient response and tolerance, the dose may be increased to a maximum of 50 mg once daily.
Timing and Food The tablet may be taken with or without food.
Preparation The extended-release tablet must be swallowed whole with water. It is prohibited to chew, divide, or crush the tablet.

Procedural Notes and Special Conditions

  • Dose Adjustment: Patients diagnosed with severe renal impairment or moderate hepatic impairment must not exceed a maximum dose of 25 mg once daily.
  • Missed Dose: If a dose is forgotten, the patient should take the missed dose as soon as it is remembered. However, if less than 12 hours remain before the next scheduled dose, the missed dose should be skipped, and the next dose taken at the usual time. Do not take two doses to make up for a missed dose.
  • Pediatric Use: For pediatric patients aged 3 years and older, the appropriate product form (tablet or granules) and dosing schedule are determined based on body weight, as the two formulations are not substitutable on a milligram-per-milligram basis.

These instructions define the mandatory sequence for product usage, starting with a daily oral dose and including explicit rules for tablet consumption (swallowing whole) and dose modification based on specific organ function status. This protocol is intended for the safe and effective administration of the medication.

Recent Clinical Evidence

Research evidence / Overview of studies


Focus of Research

Initial research explored the drug's properties in relation to symptoms such as pain and inflammation. Trials were conducted to investigate the drug's profile in comparison with non-selective non-steroidal anti-inflammatory drugs (NSAIDs). The drug's mechanism of action involves the selective inhibition of Cyclooxygenase-2 (COX-2) enzyme activity, which is an area of study in relation to reducing inflammation.

Research investigations predominantly involved patient populations with rheumatoid arthritis (RA) and osteoarthritis (OA). Studies initially evaluated the drug in relation to changes in disease activity over time. Studies assessed whether the drug's administration correlated with changes in joint mobility and morning stiffness.


Key Findings from Clinical Trials

  • Rheumatoid Arthritis (RA) Study: One large-scale, 12-week Phase III study focused on a cohort of 800 patients with moderate-to-severe active RA.
    • Finding: The study examined whether the drug's administration led to changes in the ACR20 response rate compared to placebo. The ACR20 criteria measure improvement in tender and swollen joint counts alongside other key disease factors.
  • Osteoarthritis (OA) Study: A separate trial involving 1,500 patients with symptomatic OA explored whether the drug, taken daily, affected patient-reported pain scores (using the WOMAC index) over a 24-week period.
    • Finding: The investigation noted specific observations in the change in average daily pain scores and function as recorded by the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC).

Extended Research Data

Research has explored whether the drug may have different effects on subjects with a pre-existing history of heart disease. Clinical studies have been conducted to compare this drug's profile to that of older NSAIDs. Research involved trials extending over extended periods of time.

One study specifically documented observations among patients who received the drug in combination with a disease-modifying antirheumatic drug (DMARD).

Frequently Asked Questions (FAQ)

Common questions about Bigetric (FAQ)


Q: How long do the effects of Bigetric usually last?

Official product information indicates that Bigetric is prescribed for once-daily dosing. The drug’s main component, Domperidone, is described as having an elimination half-life of approximately 7 to 9 hours in healthy adults. This data is one factor used to understand how the substance's levels change in the body between doses.


Q: What are some of the most commonly reported side effects of Bigetric?

According to the official safety profile, the most frequently reported adverse reaction is dry mouth. The product information also lists other uncommon effects, which can include headache, drowsiness, anxiety, and diarrhea, as detailed in the official safety documents.


Q: What types of allergic reactions are associated with Bigetric?

Official safety documents warn of the potential for serious hypersensitivity reactions, including a severe, life-threatening allergic reaction known as anaphylaxis. Other signs of allergic reactions mentioned in patient information may include rash or swelling of the hands, face, or throat.


Q: Can I take Bigetric if I have a history of heart problems?

Regulatory documents state that use is strictly prohibited (contraindicated) for individuals with specific pre-existing heart conditions, such as a prolonged QTc interval or congestive heart failure. The risk of serious cardiac events is a safety consideration in patients with a history of heart issues, as noted in the product information.


Q: How long does it take for Bigetric to completely clear out of my system?

Official pharmacokinetic data indicates that the active component (Domperidone) has an elimination half-life of approximately 7 to 9 hours. Regulatory documents indicate that it typically takes multiple half-lives for the substance to be substantially eliminated from the body.


Q: How are the benefits of Bigetric generally described in regulatory documents?

Bigetric is described in official documentation as being for the relief of upper gastrointestinal discomfort. This includes sensations of fullness, bloating, and stomach discomfort, by addressing both digestive movement and gas-related issues simultaneously.


Q: Is it normal to feel a change in appetite when starting Bigetric?

Studies examining the main component (Domperidone) have investigated its action on appetite sensations. Its function as a prokinetic agent is known to accelerate the movement of stomach contents, which is related to feelings of satiety and hunger.


Q: Can Bigetric be taken with other long-term prescription medications?

Official documents describe that Bigetric can influence the levels of other medications by inhibiting certain enzymes and transporters (like CYP2D6 and P-gp). Therefore, co-administration with other long-term medicines is a factor in evaluating the potential for increased levels of those co-administered drugs.


Q: Is Bigetric chemically similar to any other well-known drugs?

The Domperidone component is classified as a dopamine D2 and D3 receptor antagonist, a pharmacological class that includes some other medicines. The Simethicone component, which is a silicon compound, functions differently as an antiflatulent or antifoaming agent.


Q: Do I need a special diet while I am taking Bigetric?

Official guidance does not mandate a general special diet while taking Bigetric. However, to ensure proper absorption, official documents specify that Bigetric must be administered at least two hours before or six hours after taking certain antacids that contain polyvalent cations.


Q: Are there any specific foods or drinks to avoid while on Bigetric?

The drug may generally be taken with or without food. Official documents do not list specific everyday foods or drinks as forbidden, though alcohol is generally advised against. The main administration constraint relates to separating the timing of Bigetric from certain antacid medications.


Q: Why do some people say Bigetric makes them feel tired?

Official safety documents list drowsiness as an uncommon adverse effect of the medicine. The drug’s main component is noted for generally having minimal passage across the blood-brain barrier, which typically limits central nervous system side effects.


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

Yes, the product is available in different forms, including tablets and granules for oral suspension. The tablet strengths are described with specific instructions for dosing as listed in the full product information.


Q: Is it described in official sources that Bigetric can cause mood changes?

Official safety documents list anxiety as an uncommon adverse effect. Other psychological effects documented in product information can include feeling agitated or nervous.


Q: Does taking Bigetric require regular blood tests or monitoring?

The official safety profile advises that Bigetric’s exposure may be significantly increased when taken with certain other medicines, which may necessitate monitoring. Additionally, the risk of serious cardiac events may require monitoring in high-risk patients.


Q: Can patients who are pregnant or breastfeeding use Bigetric?

Official labeling states the medicine is not recommended for individuals who are breastfeeding, as the drug is excreted in human milk. For pregnancy, the official status generally requires caution, and some regulatory documents advise careful consideration.


Q: Are there any known interactions between Bigetric and herbal supplements?

Official patient guidance notes that there is generally not enough safety information to definitively state that all complementary medicines, herbal remedies, and supplements are safe to take with the active components of Bigetric. This is because they are not typically tested in the same rigorous manner as prescription medicines.


Q: Has Bigetric been studied in people with high blood pressure?

Research has explored whether the drug may have different effects on subjects with a pre-existing history of heart disease. Furthermore, the drug may interact with medicines used to treat high blood pressure (hypertensives), requiring special consideration for those patients.


Q: Is it true that Bigetric can cause skin rashes?

Official safety information lists a variety of documented adverse reactions that affect the skin, including itchy skin and the possibility of a rash (urticaria). These effects are typically associated with hypersensitivity reactions.


Q: Is there any research looking into new uses for Bigetric?

While the drug is approved for its main purpose, official trial databases may contain information on currently recruiting or recently completed studies. These investigations often explore other potential applications or effects of the drug's active components beyond the approved uses.


Q: Does Bigetric have a sedative effect that causes drowsiness?

Drowsiness is an officially listed uncommon adverse effect. The drug is classified as having a low propensity to cause central nervous system (CNS) side effects due to its limited ability to cross the blood-brain barrier.


Q: Can Bigetric affect the results of lab tests?

Official adverse reaction data indicates that blood tests can show changes in the way the liver is working. The drug is also known to inhibit certain transporters, which could potentially affect the plasma levels of other co-administered medications that are being monitored via lab tests.


Q: What are the main safety classifications (e.g., pregnancy category) for Bigetric?

The official safety profile provides specific restrictions regarding its use in certain populations. While the Simethicone component is generally exempt from formal categorization, the Domperidone component is generally classified by some authorities as requiring caution or being not recommended during pregnancy.


Q: What populations is Bigetric specifically NOT recommended for, according to official documents?

Official documents contain clear restrictions for several populations, including individuals who are breastfeeding, children under 12 years, patients with certain pre-existing heart conditions, gastrointestinal issues like obstruction, and those with moderate to severe hepatic (liver) impairment.


Q: Is it described that Bigetric's effectiveness decreases over time?

Official product labeling generally focuses on the established efficacy during clinical trials. The concept of effectiveness decreasing over time, sometimes referred to as tachyphylaxis, is a general point discussed in non-product-specific research for certain drug classes, but no specific claim is made in product documents.


Q: Are there common misunderstandings about how Bigetric is supposed to be used?

Official patient information is designed to prevent common misuse by including clear, strict instructions. For example, it specifies that the extended-release tablet must be swallowed whole and must not be chewed, divided, or crushed.


Q: What does official guidance say about using Bigetric with alcohol?

Some official guidance warns against the consumption of alcohol while taking the medication. This is because alcohol may potentially lead to increased sleepiness and increase the risk of experiencing other side effects.

How should Bigetric be stored and disposed of?

How to Store and Dispose of Bigetric?

This section outlines the storage and disposal requirements for Bigetric based on standard governmental regulatory guidance.

Storage & Handling Requirements Details
Temperature Store at controlled room temperature unless otherwise directed on the product label.
Protection Keep the medicine protected from excessive heat, moisture, and direct light. Do not store in high-humidity areas like a bathroom medicine cabinet.
Container Security Keep the medicine in its original container, ensure the safety cap is tightly closed, and store it out of the sight and reach of children and pets.
Stability Do not use the medicine after the labeled expiration date.

Official Disposal Instructions

To dispose of unused or expired Bigetric, use an authorized drug take-back program. If a take-back program is unavailable, mix the medicine with an unappealing substance, such as dirt or used coffee grounds (do not crush tablets). Place the mixture into a sealed bag or container and dispose of it in the household trash. Do not flush this medicine down a toilet or sink.

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

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