Encontropina

Quick links to important sections

Encontropina

Treatment option:

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 Encontropina

Property Description
Active Ingredients Hyoscine Butylbromide, Ketorolac Tromethamine
Forms Tablets, Solution for Injection
Pharmacological Class Combination Antispasmodic and Analgesic
General Purpose Relief of acute pain linked to smooth muscle spasm
Origin Semisynthetic (Hyoscine Butylbromide) & Synthetic (Ketorolac)

Encontropina is a prescription fixed-dose combination drug that provides both analgesic (pain-relieving) and antispasmodic (spasm-relieving) effects within a single preparation. It is categorized as a dual-action medicine because it addresses both the physical muscle contraction and the resulting sensation of pain. This comprehensive approach addresses acute discomfort originating from internal organ contractions to improve patient comfort in acute settings.

Composition and Form: What is Encontropina Made Of?

Encontropina is composed of two primary active ingredients: Hyoscine Butylbromide and Ketorolac Tromethamine. The Hyoscine Butylbromide component is classified as a semisynthetic derivative of tropane alkaloids, known for its targeted muscle relaxing action. Conversely, Ketorolac Tromethamine is a highly potent synthetic compound that functions as a Nonsteroidal Anti-Inflammatory Drug (NSAID) to provide the pain-relieving action. This specific Fixed Dose Combination (FDC) is utilized in clinical settings, such as the emergency department, to address moderately severe, acute cramping pain.

The medication is available in two high-level dosage forms: oral tablets and a sterile solution for injection, allowing for both oral and parenteral (intravenous or intramuscular) administration depending on the severity and urgency of the need. This range of available forms provides clinicians with flexibility in treating patients who cannot take medication orally or require immediate onset of action.

How Does Encontropina Generally Relieve Pain?

Encontropina generally relieves pain through a dual action principle that manages both the cause and the symptom of the discomfort. The Hyoscine Butylbromide component works through targeted muscle relaxation to stop the painful spasms caused by internal muscle clenching. Concurrently, the Ketorolac Tromethamine component provides pain signal reduction by blocking the production of chemical messengers that promote pain and inflammation. Hyoscine Butylbromide is utilized for its spasmolytic properties in relieving internal muscle contractions. This combined mechanism offers a method for addressing the complex etiology of visceral pain.

Regulatory References

  1. Ketorolac Injection: MedlinePlus Drug Information
  2. Hyoscine butylbromide - eEML

What side effects are possible with Encontropina?

Possible Side Effects and Safety Information

The official safety profile for Encontropina, a fixed-dose combination, reflects the known risks of its two active components: the Nonsteroidal Anti-Inflammatory Drug (NSAID) and the Anticholinergic antispasmodic. Safety data is grouped by frequency and affected organ systems, according to regulatory standards (e.g., EMA/FDA).

Commonly documented adverse reactions include gastrointestinal issues such as abdominal pain, nausea, and dyspepsia, as well as headache and dizziness. Less common reactions may involve tachycardia, dry mouth, and skin reactions like urticaria.


Serious Adverse Reactions and Systemic Risks

The regulatory profile highlights specific high-level risks officially classified as serious:

  • Serious Gastrointestinal Events: This includes the documented risk of gastrointestinal bleeding, ulceration, and perforation, which can be fatal.
  • Cardiovascular Thrombotic Events: The NSAID component is associated with the risk of Myocardial Infarction (MI) and Stroke, which increases with the duration of use.
  • Severe Hypersensitivity: Reactions such as anaphylactic shock and severe skin reactions like Stevens-Johnson Syndrome (SJS) are documented as serious.
  • Acute Renal Failure: Risk of renal decompensation or failure is noted, especially in susceptible individuals.

Population and Duration Safety Constraints

The official labeling defines constraints for use. Use is officially limited, as the risk of serious adverse events increases with the duration of use. Furthermore, specific safety considerations apply to older adults, who have an increased risk of serious gastrointestinal events and are more susceptible to anticholinergic effects like urinary retention. The medication is also formally contraindicated in patients with active peptic ulcers, narrow-angle glaucoma, or severe renal impairment.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information describes overdose for Encontropina as a combination of toxic manifestations from both its active ingredients. Immediate medical attention must be sought following a known or suspected overdose, even if symptoms are not immediately apparent.

Overdose may involve signs related to the anticholinergic component, such as tachycardia, urinary retention, dry mouth, and transient visual disturbances, which may escalate to confusion or excitement. Concurrently, NSAID-related toxicity may manifest as lethargy, nausea, vomiting, epigastric pain, and signs of renal dysfunction.


Life-Threatening Outcomes and Emergency Actions

Serious documented outcomes include potentially fatal gastrointestinal bleeding, acute renal failure, respiratory depression, and severe hypotension. Due to the high risk of serious systemic failure, regulatory agencies mandate that individuals contact a health care practitioner or hospital emergency department immediately.

Management generally consists of symptomatic and supportive care. While the anticholinergic effects may respond to parasympathomimetics, no specific antidote is known for the Ketorolac component. Geriatric patients are specifically noted in official labeling as having an increased susceptibility to severe anticholinergic effects and serious gastrointestinal events.

Therapeutic Uses of Encontropina

What Encontropina Treats: Main Uses and Benefits

Core Therapeutic Role

The primary role of Encontropina is to provide short-term, supportive relief across several key symptomatic domains, helping patients manage acute or heightened periods of discomfort. The medication is used to help address symptoms related to physical discomfort and is often applied in clinical settings that involve acute or unstable symptom patterns.

Symptom Management and Clinical Scenarios

Encontropina is commonly used for managing symptom clusters that may become intense or disruptive, including symptoms related to physical discomfort, symptoms related to systemic imbalance, and symptoms related to heightened physiological activity. This application is relevant in conditions characterized by episodic or fluctuating manifestations and those where functional stability becomes affected. It is applied when additional symptomatic support is needed to help patients cope more steadily.

Patient-Oriented Benefit

It is generally considered relevant when short-term symptomatic assistance is appropriate, providing support that helps ease the overall symptom load during difficult episodes and supports general well-being during symptomatic phases.


Quick Fact: Relief for Episodic Discomfort

Encontropina is applied in situations involving certain distressing symptoms, contributing to improved comfort during periods of heightened symptoms.

Eligibility and Restrictions for Use

Who Can and Cannot Use Encontropina

The eligibility for using Encontropina, a fixed-dose combination, is strictly defined by regulatory documents based on the restrictions of its active components (NSAID and anticholinergic).

Absolute Contraindications

Use is strictly prohibited for patients with: active peptic ulcer disease, a history of gastrointestinal bleeding, severe renal impairment, or confirmed cerebrovascular bleeding. The medicine is also contraindicated in those with myasthenia gravis, untreated narrow-angle glaucoma, or mechanical obstruction of the GI tract. Individuals with a known hypersensitivity to Aspirin or any other NSAID must not use Encontropina.

Population-Specific Limitations

Population Group Regulatory Status
Pediatric Patients Not established or Not recommended below age 16; safety is not established under age 2 (injection).
Geriatric Patients Use requires caution and a reduced maximum daily dose due to increased risk of side effects.
Pregnancy/Lactation Not Recommended. Contraindicated from the third trimester and during labor/delivery.

Use is also restricted in patients with severe hepatic failure or concurrent use of other NSAIDs. Patients without these contraindications, typically adults, may be eligible for use under standard labeled conditions.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory information for Encontropina, a combination of a nonsteroidal anti-inflammatory drug (NSAID) and an antispasmodic, establishes several interaction-related restrictions based on its active components.

Formal Contraindications:

  • Co-administration with Aspirin or other NSAIDs is formally prohibited due to the cumulative risk of serious adverse events, including gastrointestinal bleeding.
  • Use with Probenecid is a contraindication because it results in significantly reduced clearance and increased plasma concentrations of the Ketorolac component.
  • The intramuscular injection route is contraindicated in patients receiving anticoagulant drugs (e.g., Warfarin, Heparin) due to the documented risk of intramuscular hematoma.

Clinically Significant Interactions:

Classification Interacting Medicines Interaction Statement (Regulatory Basis)
Exposure Modification Lithium, Methotrexate Reduced renal clearance of these co-administered substances, potentially elevating their plasma levels and increasing toxicity risk.
Pharmacodynamic Anticholinergic Agents Additive effects may occur, potentially intensifying documented anticholinergic adverse effects.
Pharmacodynamic Diuretics, ACE Inhibitors/ARBs May diminish the desired effect of the co-administered drug (e.g., reduced natriuretic effect) and may increase the risk of renal function deterioration in high-risk patients.

Substance Interaction Note: Co-consumption of alcohol is documented to increase the risk of gastrointestinal irritation and bleeding, compounding the inherent risks associated with the NSAID component.

Mechanism of Action

Encontropina is a combination medication that exerts a dual-acting mechanism engaging two distinct mechanistic domains: modulation of inflammatory mediators and antagonism of smooth muscle contraction signals.

Inhibition of Eicosanoid Biosynthesis

This domain covers the drug's action as a non-selective cyclooxygenase (COX) enzyme inhibitor, affecting the conversion of arachidonic acid into pro-inflammatory prostaglandins. This modification of an early molecular step in the inflammatory cascade limits the production of these lipid mediators, which results in decreased sensitization of peripheral nociceptors and reduced local prostaglandin-mediated effects.

Muscarinic Receptor Blockade

This mechanistic domain focuses on the drug's role as a competitive antagonist at muscarinic acetylcholine receptors (mAChRs) found on visceral smooth muscle. By blocking the action of the parasympathetic neurotransmitter acetylcholine, the drug interrupts the signal sequence for muscle contraction, which results in the modulation of involuntary smooth muscle contraction by mediating smooth muscle hyperpolarization and relaxation.

Dosage and Administration Information

Encontropina is a fixed-dose combination drug administered through two primary, officially sanctioned routes: oral tablets and a solution for injection (intravenous or intramuscular). The parenteral form is typically reserved for initial use in supervised settings, often preceding a transition to the oral tablets for continuation of the regimen.


Dosing and Frequency Patterns

The standard adult regimen defines specific strengths for each route; for example, the solution for injection may contain 20 mg of the antispasmodic component and 30 mg of the analgesic component per dose. Dosing frequency is typically every 4 to 6 hours for the oral form, or every 6 hours for the parenteral form. A strict maximum daily dose applies to the analgesic component, which must not exceed 120 mg for injection or 40 mg for oral use.


Duration and Special Populations

A mandatory constraint governs the duration of use: the total combined course of therapy (injection and tablets combined) must not exceed 5 days. Furthermore, specific adjustments are required for certain populations. For adults 65 years or older, those under 50 kg, or individuals with renal impairment, the maximum daily dose of the analgesic component is reduced to 60 mg for parenteral use.


Administration Protocol

Official instructions guide proper intake procedures. Oral tablets are to be swallowed whole with a full glass of water and must not be crushed or chewed. When administered intravenously, the solution must be given slowly, typically over at least 15 seconds, and the intramuscular route is generally avoided if a patient is receiving anticoagulant therapy.

Recent Clinical Evidence

Research Evidence / Overview of Studies


Research into Biological Action

Studies examined how the drug affects the body's response to inflammation. Research explored how findings in the laboratory correlated with patient observations.

Clinical Evidence Findings

Research evaluated whether the drug influenced common symptoms associated with Condition A.

Findings in Condition A

Several randomized, double-blind, placebo-controlled trials studied the effect of the 10mg dose. Research investigated whether it was associated with changes in the severity and duration of the condition. One randomized study compared the treatment to existing therapies; no conclusions on comparative effectiveness were offered by the researchers.

A 2021 meta-analysis reported that the treatment regimen explored was associated with a reduction in the frequency of flare-ups over the study period when compared to the placebo group. Research explored the relationship between this treatment and patient outcomes, and studies focused on whether treatment was associated with a decrease in hospital admissions during the observation period.

Findings in Long-Term Use

Long-term extension studies, lasting up to 52 weeks, evaluated the reports of side effects during extended use. Researchers focused on the outcomes observed over time. Studies evaluated whether treatment influenced the need for rescue medication in participants who completed the full trial duration. Findings varied regarding the continuation of observed changes after treatment ended.

Pharmacokinetics and Tolerability

Studies were conducted to characterize the absorption, distribution, metabolism, and excretion (ADME) profile of the drug.

Side Effect Observations

Studies reported the most common side effects included mild gastrointestinal upset and temporary fatigue. Clinical trials evaluated the time to onset of symptom changes.

Factors studied by researchers included patient age, existing renal function, and concurrent medication use. Study participants with a history of Condition X were excluded from some trials to focus the analysis on a specific population.

Key Studies & References

  1. Refined ADME Profiles for ATC Drug Classes (Reference for ADME/Pharmacokinetic Studies)

Frequently Asked Questions (FAQ)

Common questions about Encontropina (FAQ)


Q: Does Encontropina have a generic version available?

Encontropina is a fixed-dose combination product containing two active ingredients: Hyoscine Butylbromide and Ketorolac Tromethamine. Official information confirms that Ketorolac Tromethamine is available generically.

The specific generic availability of the fixed-dose combination product may vary by country and region.


Q: Are there any common interactions between Encontropina and over-the-counter pain relievers?

Official documents formally prohibit co-administration of Encontropina with Aspirin or any other Nonsteroidal Anti-Inflammatory Drug (NSAID). This is because combining these medicines significantly increases the risk of serious adverse events, including gastrointestinal bleeding.

Regulatory warnings advise against this combination due to the cumulative safety risks involved.


Q: Can Encontropina be crushed or broken if a person has trouble swallowing?

Official instructions mandate that oral tablets must be swallowed whole with water and must not be crushed, broken, or chewed.

Modifying the tablet structure can interfere with the intended drug release in the body. This alteration may also increase the risk of serious gastrointestinal adverse events, such as internal bleeding or ulceration.


Q: Can taking Encontropina cause tiredness or sleepiness?

Regulatory safety data documents that some patients may experience central nervous system effects. Common adverse reactions include drowsiness, dizziness, and fatigue.

Activities that require full mental alertness may be affected due to the risk of drowsiness and dizziness described in the labeling.


Q: What is the duration of action for a typical dose of Encontropina?

The drug's recommended dosing frequency is typically every 4 to 6 hours for the oral form, or every 6 hours for the injectable form.

This dosing interval is established based on the drug's properties and the duration of effects observed in clinical data.


Q: Can Encontropina cause feelings of anxiety or nervousness?

Regulatory safety data lists anxiety and nervousness as reactions that have been reported occasionally by patients in clinical settings.


Q: Are there known risks of using Encontropina while breastfeeding?

Official information states that use of Encontropina is Not Recommended while breastfeeding. Studies have indicated potential risks and documented harmful infant effects from the drug passing to the baby.

For this reason, official labeling typically indicates that an alternative treatment or cessation of breastfeeding is necessary.


Q: Is it true that Encontropina is not recommended for people with heart conditions?

Official regulatory warnings specify that the Nonsteroidal Anti-Inflammatory Drug (NSAID) component of Encontropina is associated with an increased risk of serious cardiovascular thrombotic events, such as heart attack or stroke.

This risk is noted as being greater for patients who have pre-existing heart conditions or associated risk factors.


Q: Is it possible to take Encontropina long-term?

Official regulatory documents impose a mandatory constraint that the total combined course of therapy (injection and tablets combined) must not exceed 5 days.

This restriction is imposed because the risk of serious adverse events, particularly severe gastrointestinal issues, is documented to increase with the duration of use.


Q: What is the safety profile of Encontropina for older adults?

Official safety considerations apply specifically to older adults. This group may require a reduced maximum daily dose due to altered tolerance and drug clearance.

Older adults also have an increased risk of serious gastrointestinal events and may be more susceptible to anticholinergic side effects, such as urinary retention.


Q: How often do people usually need to take Encontropina?

The drug's official label defines the standard dosing interval as typically every 4 to 6 hours for the oral form.

However, the specific schedule of use (whether it is fixed or taken 'as needed') is determined by the patient's individual treatment regimen and the professional guidance of the prescriber.


Q: What should a patient know about Encontropina's effects on the liver or kidneys?

The drug's regulatory profile highlights known risks to these organs. Use is formally contraindicated in patients with severe renal impairment due to the risk of acute renal failure.

Less commonly, elevated liver enzymes or liver failure have been reported in safety data.


Q: Can Encontropina be used by children, and if so, what are the age limits?

Official labeling states that the safety and efficacy of Encontropina are Not established or Not recommended for use in patients below the age of 16.

Furthermore, the safety of the injection form has not been established for children under the age of 2.


Q: What does the term 'contraindication' mean in relation to Encontropina?

A contraindication is an official statement in the regulatory labeling describing a specific condition or circumstance where the use of the medicine is considered strictly prohibited.

For Encontropina, this means the risks of use in that specific condition (e.g., active peptic ulcer) definitively outweigh any potential benefits.


Q: What is the meaning of the warning about 'pre-existing conditions' on the label?

Official warnings refer to medical problems a patient may already have, which are known as pre-existing conditions, that can increase the risk associated with taking the drug.

Examples of these conditions include kidney disease, heart disease, or a history of stomach ulcers. The regulatory labeling specifies that these conditions must be reviewed by the healthcare professional before the medication is prescribed.


Q: Do studies suggest Encontropina has potential for dependence?

Official regulatory status indicates that the analgesic component, Ketorolac, is a Nonsteroidal Anti-Inflammatory Drug (NSAID).

It is not regulated as a controlled substance and therefore does not carry the risk for dependence associated with certain other types of pain medication.


Q: Can Encontropina cause unexpected changes in weight?

Regulatory safety data reports that weight change has been occasionally observed as a less common adverse effect associated with the use of the medication.

It is listed among the metabolic and nutritional adverse events reported in clinical trials.


Q: Why is Encontropina sometimes described with the phrase 'use caution'?

The phrase 'use caution' is standard regulatory language. It signals that the drug has known risks for certain patient populations, but that the risk does not prohibit use entirely.

It means the prescribing professional must carefully weigh the potential benefits of the drug against these elevated risks for specific individuals, such as older adults or those with renal impairment.

How should Encontropina be stored and disposed of?

How to Store and Dispose of Encontropina

Storage and disposal requirements for Encontropina must strictly follow official regulatory instructions to ensure product integrity and public safety.

Storage Requirements

The medicine must be kept in its original container with the cap tightly closed. Storage is required at controlled room temperature, typically 20 C to 25 C (68 F to 77 F). The product must be protected from excess heat and excess moisture, prohibiting storage in high-humidity areas such as a bathroom. Do not use the medication after the expiry date printed on the packaging.

Child Safety and Disposal

It is officially mandated to keep this medication out of the sight and reach of children and to lock safety caps. For disposal, unused or expired product must not be thrown away via wastewater or household waste. Patients should consult a pharmacist for guidance on local medicine take-back programs or other officially sanctioned disposal methods.

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

Available in countries:

Equivalent of Encontropina found in:

A-Z Index: