Mepasil

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Mepasil

Method of action: Anti-Inflammatory

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 Mepasil

Mepasil is a medicinal preparation containing the active ingredient Silibinin (Silybin), which is classified as a Hepatoprotective agent. It is designed for the support and defense of the liver against metabolic stress.


Quick Facts: Mepasil

Property Description
Active ingredient Silibinin (Silybin)
Form Tablet or Capsule (Oral), IV Preparation
Pharmacological class Hepatoprotective agent
General purpose Liver support and functional defense
Origin Natural (Phytopharmaceutical), derived from milk thistle

Defining the Active Ingredient and Class

Mepasil's active component, Silibinin, is a member of the Flavonolignan chemical class, a complex compound derived from plants. Silibinin is the principal biologically active constituent of the Silymarin extract, which is obtained from the seeds of the milk thistle plant (Silybum marianum). This classification identifies Mepasil as a Phytopharmaceutical with a botanical origin.

Silibinin is classified as a Hepatoprotective agent. Within this therapeutic role, Silybin is considered a primary agent for liver health due to its defensive properties.


Form and General Purpose

Mepasil is typically provided as a single active component product in oral dosage forms (Tablet or Capsule). This formulation often requires special pharmaceutical excipients, as Silibinin naturally exhibits poor water solubility, and these additions are necessary to ensure the active ingredient can be effectively absorbed by the body.

The overall purpose of Mepasil is to assist the liver in maintaining its stability and carrying out its essential metabolic work. It achieves this by focusing on two fundamental principles: Cell Membrane Protection and Free Radical Scavenging. By stabilizing the cellular structure and neutralizing damaging molecules, Mepasil helps protect liver tissue from oxidative stress.

Regulatory References

  1. EMA Herbal Monograph on Milk Thistle

What side effects are possible with Mepasil?

Possible side effects and safety information

The safety profile of Mepasil (Silibinin) is based strictly on documentation from government regulatory authorities. Adverse reactions are typically mild and organized by the affected System Organ Class (SOC).

Documented Adverse Reactions

Side effects are often categorized by frequency in official labeling:

System Organ Class (SOC) Frequency Classification Adverse Reaction Listed
Gastrointestinal disorders Rare (Oral) Mild laxative effect
Immune system disorders Very Rare Hypersensitivity reactions
Skin and subcutaneous tissue disorders Very Rare Rash
Respiratory, thoracic, and mediastinal disorders Very Rare Dyspnoea (shortness of breath)

Other reactions, such as nausea, abdominal fullness, diarrhea, asthma, and severe allergic reactions including anaphylaxis, have been reported with a Not Known frequency, meaning their rate of occurrence cannot be reliably estimated from available data.

Serious Reactions and Regulatory Constraints

While severe adverse events are rare, the official profile documents the potential for anaphylaxis/anaphylactic shock as a serious allergic manifestation.

Key safety constraints and warnings from regulatory documents include:

  • Contraindication: Mepasil is contraindicated in individuals with known hypersensitivity to the active ingredient, milk thistle, or other plants in the Asteraceae (daisy/ragweed) family.
  • Pregnancy and Lactation: Use is not recommended due to insufficient reliable data for these specific populations.
  • Safety Monitoring: Immediate consultation with a healthcare professional is necessary if signs of icterus (jaundice) appear, or if there is a change in the color of urine or stool.
  • Treatment Limitation: Use of the preparation does not replace the need to abstain from the underlying cause of liver damage, such as alcohol.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documentation for Mepasil (Silibinin/Silymarin) indicates a constrained overdose profile characterized by a lack of reported clinical cases and the absence of a specific antidote.


Official Regulatory Guidance

Feature Regulatory Statement
Documented Manifestations Specific signs or symptoms of overdosage have not hitherto been observed in formal regulatory documents. Amplification of mild effects, such as gastrointestinal discomfort, may be possible.
Antidote Information A special antidote is not known for overdosage with this active component.
Management Measures Treatment of suspected overdosage requires the implementation of symptomatic and supportive measures as appropriate.
Monitoring No specific requirements for hospital monitoring or continuous observation are explicitly listed in the official overdose sections.

When to Seek Urgent Help

The most critical regulatory instruction regarding emergency action is the mandate for immediate medical consultation if specific signs of liver dysfunction are observed, such as icterus (jaundice) or a change in the color of the urine or stool. A healthcare practitioner should also be consulted if any existing symptoms worsen or do not improve. The regulatory documents define the overdose management entirely around supportive care due to the absence of documented manifestations and the lack of a known antidote.

Therapeutic Uses of Mepasil

Main Therapeutic Uses

Mepasil is primarily used for its hepatoprotective properties, supporting the functional health and structural integrity of the liver. It is commonly indicated for individuals managing chronic inflammatory liver conditions or metabolic disturbances affecting hepatic tissue.

Liver Support and Recovery

The medication is utilized to support the liver during recovery from various forms of hepatic stress. This includes assisting in the management of chronic hepatitis and supporting the organ's regenerative processes following exposure to hepatotoxic substances such as alcohol or certain environmental toxins.

Management of Fatty Liver Changes

Mepasil is indicated for the treatment of hepatic steatosis, also known as fatty liver. It aids in stabilizing liver cell membranes and may help mitigate the accumulation of lipids within liver cells, thereby supporting overall metabolic function.

Key Benefits and Mechanism of Action

The therapeutic benefits of Mepasil are derived from its ability to interact with the biological processes of liver cells (hepatocytes).

Antioxidant Protection

One of the primary benefits is the neutralization of free radicals. By reducing oxidative stress, the medication helps prevent the destruction of cellular components, which is a common pathway in the progression of liver diseases.

Membrane Stabilization

Mepasil contributes to the stabilization of hepatocyte membranes. By maintaining the integrity of these cell walls, it helps prevent the leakage of essential cellular enzymes and protects the cells against further entry of harmful toxins.

Support for Protein Synthesis

The medication facilitates the stimulation of RNA polymerase I, an enzyme that promotes the synthesis of structural and functional proteins. This process is essential for the natural repair and regeneration of damaged liver tissue.

Regulatory References

  1. NIH MedlinePlus guidance

Eligibility and Restrictions for Use

Who Can and Cannot Use Mepasil?

This section explains the population eligibility rules for Mepasil (Silibinin/Silybin) as defined in official government regulatory documents.


Populations Strictly Excluded

The most stringent restriction is the absolute contraindication for any person with a known hypersensitivity (allergy) to the active substance, Milk Thistle (Silybum marianum), or any plant belonging to the Asteraceae family (e.g., daisies, ragweed).


Age and Reproductive Restrictions

The standard oral preparation of Mepasil is designated primarily for adults 18 years and older. Use is formally not recommended or not established in the pediatric population (children and adolescents) due to insufficient reliable data from safety studies, according to regulatory monographs.

Additionally, use is generally not recommended during pregnancy or breastfeeding due to a lack of sufficient human safety data. Use may also be restricted or require close supervision in women with hormone-sensitive conditions (e.g., certain cancers or uterine fibroids).


Conditional Use

For general liver support, Mepasil is authorized for use only after a medical professional has formally excluded a serious underlying liver condition that requires immediate clinical intervention. The intravenous form of Silibinin has distinct, highly specific eligibility rules related to acute poisoning.

What should I know about interactions with other medicines?

Mepasil is a combination product containing meprobamate (a central nervous system depressant) and benactyzine (an anticholinergic and mild tranquilizer). The interactions associated with this medication primarily relate to the additive effects of the meprobamate component, which can lead to significant central nervous system (CNS) depression.

️ Major Interactions (Avoid Combination)

Combining Mepasil with other substances that cause CNS depression can lead to profound sedation, respiratory depression, coma, and potentially death. These include:

  • Opioids and opioid derivatives: Such as hydrocodone, oxycodone, and sufentanil.
  • Benzodiazepines: Including alprazolam, diazepam, and others.
  • Barbiturates: Medicines like phenobarbital.
  • Other Sedatives/Hypnotics: Including sodium oxybate or certain other anxiolytics.

Moderate Interactions (Use with Caution)

Caution is advised when co-administering Mepasil with other drugs that may increase the risk of CNS depression or anticholinergic effects, or where Mepasil may alter drug levels through liver metabolism.

Drug Type Example Agents Potential Effect
Other CNS Agents Antidepressants, Antihistamines, Antipsychotics, General Anesthetics, Alcohol Increased sedation, dizziness, impaired psychomotor skills
Anticholinergics Atropine, other antispasmodics Increased risk of dry mouth, constipation, urinary retention, or confusion (due to benactyzine component)
Liver-Metabolized Drugs Certain anticoagulants, anti-epileptics Meprobamate may induce liver enzymes, potentially reducing the effectiveness of these co-administered drugs.

Alcohol consumption must be strictly avoided during Mepasil therapy as it significantly enhances the sedative effects and the risk of serious side effects. Always inform your healthcare provider of all prescription medications, over-the-counter products, and herbal supplements you are taking before starting Mepasil.

Mechanism of Action

Mepasil's action, derived from Silibinin, is defined by a multi-target interaction profile at the cellular level and the modulation of pathways associated with chronic physiological stress. This compound operates across three major mechanistic domains.

️ Mechanistic Scavenging and Cellular Barrier Stabilization

The molecule functions as an antioxidant and effective scavenger of free radicals, thereby reducing lipid peroxidation. This action chemically neutralizes damaging species and structurally reinforces the hepatocyte cell membrane, which supports structural integrity at the cell boundary. The resulting physiological effect is cellular membrane stabilization and modulation of the cellular response to oxidative stress.

️ Regulating Inflammatory and Fibrotic Pathways

Silibinin actively modulates key internal signaling cascades. It acts as an inhibitor of the NF-κB transcription factor, which suppresses the release of pro-inflammatory mediators. Simultaneously, it interferes with the TGF- beta 1 signaling pathway, inhibiting the activation of Hepatic Stellate Cells (HSCs). This mechanism results in the downregulation of hepatic inflammatory signaling and downregulates the signaling pathways necessary for fibrotic matrix deposition.

Influencing Hepatocyte Repair and Renewal

The mechanism involves stimulation of RNA Polymerase I activity, an enzyme essential for synthesizing proteins necessary for cell function and structure. This molecular action increases the synthesis of proteins required for hepatocyte renewal. This mechanism influences processes of cellular repair and renewal within the liver, thereby influencing the cell's capacity for renewal.

Dosage and Administration Information

How Mepasil is Used: Official Administration Guidelines

Mepasil, which contains the active ingredient Silibinin, is a hepatoprotective agent administered through two distinct, officially recognized methods determined by the clinical need. The usage patterns are strictly defined and differentiate between long-term supportive care and acute intervention.


Administration Routes and Schedules

Category Official Instructions (Label-Based)
Route of Administration Oral (Capsule/Tablet) for supportive regimens; Intravenous (IV) (Solution) for acute, life-threatening scenarios.
Standard Dosing Oral: Typically 420 mg to 800 mg total standardized silymarin daily. IV: A weight-based protocol, often 20 mg/kg to 50 mg/kg per day in emergent care.
Frequency The total oral daily dose is commonly administered in two or three equally divided doses. The IV preparation is given either as a continuous infusion or in four divided doses per day.
Timing in Relation to Meals Oral formulations are generally directed to be taken with meals to improve the low natural absorption of the active compound.

Administration Context and Duration

Official instructions establish specific procedural requirements based on the administration method. The oral form is intended for long-term supportive maintenance, with clinical regimens lasting several months or longer. Administration is typically done in an outpatient setting.

The IV preparation, conversely, is used as a mandatory short-term, acute course, often administered over just a few days until the immediate danger has passed. Due to the critical nature of its use and required preparation steps, the IV solution must be administered only in a hospital or specialized center setting under professional supervision.

These official instructions define the required framework for Mepasil use, ensuring that the appropriate form, dose, and duration are matched to the corresponding use-context.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Mepasil


Evidence for Liver Support in Alcoholic Liver Disease (ALD)

Research has examined the use of Silibinin, the active ingredient in Mepasil, in adults diagnosed with Alcoholic Liver Disease (ALD). The evidence base includes Randomized Controlled Trials (RCTs) and meta-analyses. Researchers primarily monitored outcomes related to physiological strain on the liver, specifically examining changes in certain liver function enzyme levels (such as ALT, AST, and GGT). Studies reported observed shifts in measurements of these enzymes. However, the findings were inconsistent across all individual studies, and the certainty remains low regarding the full findings on the long-term progression of ALD. A key limitation is the variability in formulation and the need for further robust, standardized trials.


Evidence for Adjunctive Use in Chronic Viral Hepatitis and Cirrhosis

Silibinin was also studied for its use alongside standard medical care in individuals with Chronic Viral Hepatitis (Hepatitis B or C) and those with established Cirrhosis. Research includes specialized RCTs and observational cohort studies that track patient groups over time. Studies monitored outcomes related to systemic or functional imbalance, such as changes in liver stiffness and key markers of advanced liver disease, and overall survival. Research highlights changes measured during the study period, but the available data are still emerging, and findings were mixed and inconsistent across the literature. The design and methodology varies across studies, and there is limited information to establish definitive, long-term clinical patterns for severe liver disease.


What is Still Uncertain About Mepasil's Evidence

The research highlights what is known and what is still uncertain about Mepasil. Key limitations noted in the scientific literature include inconsistent findings across different published trials. The design and methodology varies across studies due to differences in design and the specific Silibinin/Silymarin products used. The data for long-term outcomes like survival or prevention of major clinical complications remain insufficient to draw definitive conclusions. Overall, the research provides context but not individual predictions, and findings describe group patterns, not personal outcomes.

Key Studies & References

  1. Milk Thistle: Usefulness and Safety | National Center for Complementary and Integrative Health (NCCIH) / NIH

Frequently Asked Questions (FAQ)

Common questions about Mepasil (FAQ)

Q: Can Mepasil cause unusual dreams or sleep disturbances?

A: Official product information for Mepasil's active ingredient, Silibinin, does not typically list unusual dreams or specific sleep disturbances as frequently reported side effects. However, documents for related products have noted rare occurrences of fatigue and headaches, which may indirectly influence sleep patterns. Concerns about changes to sleep patterns are typically discussed with a healthcare professional.

Q: How long does Mepasil stay in the body after stopping its use?

A: Pharmacokinetic studies, which describe how the body processes a drug, indicate that Mepasil's active component, Silibinin, has a relatively short biological half-life. This means the substance is quickly metabolized and cleared from the body. The specific time is subject to individual factors like metabolism.

Q: How long does the effect of one dose of Mepasil typically last?

A: The administration frequency for Mepasil is typically designed to maintain consistent levels of the active ingredient in the body. Since the oral daily dose is commonly divided and taken two or three times a day, this pattern suggests the effects of a single dose require regular replenishment throughout the day to sustain the intended therapeutic support.

Q: Is it common to feel a little dizzy when first taking Mepasil?

A: Regulatory summaries mention that dizziness is a possible adverse effect of Mepasil or related products. However, it is generally described as a mild side effect and is not considered one of the most common reactions reported in clinical data.

Q: Does Mepasil often cause noticeable changes in appetite?

A: Official adverse effect documentation for the active ingredient indicates that a decrease in appetite, known as anorexia, is a potential side effect. It is typically considered a mild occurrence and is not frequently reported by patients taking Mepasil.

Q: Is Mepasil usually taken short-term or long-term?

A: The oral form of Mepasil is generally intended for long-term supportive maintenance, which may involve use over several months or longer. Conversely, the intravenous (IV) form is strictly for a short-term, acute course under critical care supervision in a hospital setting.

Q: What is the half-life of Mepasil as described in regulatory documents?

A: Pharmacokinetic studies described in regulatory-adjacent documents show that Silibinin has a relatively short half-life. While the exact value varies by the product's specific formulation, this short duration suggests the active compound is metabolized and excreted quickly by the body.

Q: Is Mepasil used for conditions other than the main one listed?

A: Beyond general liver support, official documentation related to the active ingredient, Silibinin, has noted its traditional use for the relief of symptoms of general digestive disorders. These include sensations of fullness and indigestion, provided more serious medical conditions have been excluded.

Q: Is Mepasil considered an antidepressant or a pain reliever?

A: Mepasil is formally classified by regulatory authorities as a Hepatoprotective agent and a Flavonolignan. Its intended therapeutic role is related to liver support and defense, and it is not classified as an antidepressant or a pain reliever.

Q: Is there a list of over-the-counter medications that should not be taken with Mepasil?

A: Official warnings note that Mepasil's active ingredient may influence liver enzymes involved in drug metabolism. This could potentially alter the blood levels of many medications, including some over-the-counter (OTC) drugs. Regulatory warnings indicate the importance of disclosing all current medications, including OTC products.

Q: Are there any common foods or drinks that interact with Mepasil?

A: The official instructions strictly advise against alcohol consumption during Mepasil therapy. This is because alcohol can significantly increase the drug's sedative effects and raise the risk of serious side effects. No other common foods or drinks are generally listed as strict prohibitions.

Q: Does Mepasil interact with supplements like vitamins or herbal products?

A: Official warnings state the necessity of disclosing all herbal supplements to a healthcare provider before starting Mepasil. This is due to the potential for the active ingredient to influence the body's liver metabolism processes.

Q: Is it safe to take Mepasil with common medicines for colds or allergies?

A: Caution is advised when combining Mepasil with certain cold or allergy medicines, especially those containing antihistamines. This is because Mepasil's meprobamate component can increase the risk of side effects like increased sedation. Guidance from a medical professional is used to assess specific combinations.

Q: Can someone with liver issues use Mepasil?

A: While Mepasil is used for liver support, its use is contraindicated (not recommended) in individuals with specific, severe liver conditions such as severe bile duct obstruction or advanced liver failure. For general liver support, use is only authorized after a medical professional has confirmed that a serious, immediate-intervention condition has been excluded.

Q: Are there any long-term effects associated with Mepasil use?

A: The oral formulation of Mepasil is designed for long-term use, and mild adverse effects are generally well-tolerated over time. However, scientific literature often notes that the data on very long-term outcomes, such as survival or prevention of major clinical complications, remains insufficient to draw definitive conclusions.

Q: What is the difference between Mepasil and similar medications with a different name?

A: Mepasil is a prescription product containing a standardized amount of the active compound, Silibinin. Other similar products may use the crude Silymarin extract or different formulations, which can lead to variability in the absorption rate and the actual concentration of the active ingredient delivered to the body.

Q: How does Mepasil differ from treatments that don't require a prescription?

A: Mepasil is a regulated, standardized prescription medication. Many non-prescription products are often regulated as dietary supplements, which typically have less stringent standards regarding the active ingredient concentration and absorption. Mepasil aims to deliver a consistent, therapeutically active dose of Silibinin.

Q: What should be done if a suspected interaction occurs while taking Mepasil?

A: Official patient information directs that if you suspect you are experiencing an adverse reaction or a drug interaction, you should promptly inform your doctor or pharmacist. A medical professional can assess the situation and determine appropriate management.

Q: Is it acceptable to drink alcohol in moderation while taking Mepasil?

A: No. The official instructions clearly state that alcohol consumption must be strictly avoided during Mepasil therapy. This warning applies regardless of the amount, as alcohol significantly enhances the sedative effects and the risk of serious side effects.

Q: Is Mepasil a controlled substance in the US or other countries?

A: Mepasil's active ingredient, Silibinin, is a phytopharmaceutical derivative and is not classified as a controlled substance under the US Controlled Substances Act or comparable international regulatory schedules.

Q: What information is available about Mepasil for patients with diabetes?

A: Some regulatory-adjacent product information advises that the active ingredient may not be suitable for individuals with diabetes mellitus. Research has investigated the use of Silibinin in this area, but any use requires specific professional assessment.

Q: Why do official documents advise caution when driving or operating machinery while on Mepasil?

A: Official documents include a general warning to exercise caution when performing complex tasks like driving. This is due to the potential for rare side effects such as dizziness and fatigue, which could impair the ability to operate machinery safely.

Q: Is Mepasil available as a generic version?

A: The active ingredient, Silibinin, is naturally sourced, but the specific standardized prescription formulation of Mepasil may or may not have an officially approved generic equivalent. Its availability depends on patent laws and the specific regulatory market.

Q: What are the signs of taking too much Mepasil?

A: In cases of acute overdose, the reported signs are generally consistent with known side effects but are significantly more pronounced. Official guidance for suspected overdose involves contacting a poison control center or emergency medical services.

Q: What is the research evidence for Mepasil's benefits beyond its primary approved use?

A: Scientific inquiry has investigated the active ingredient for its potential applications in conditions beyond its primary approved use. These areas of research include metabolic syndrome, certain cancers, and diabetes mellitus, but these uses are currently subjects of scientific inquiry and not formally approved indications.

How should Mepasil be stored and disposed of?

How to Store and Dispose of Mepasil

The storage and disposal requirements for Mepasil (Silibinin) are defined in the official regulatory labeling to maintain the product's stability and ensure safety.

Requirement Official Regulatory Statement
Temperature & Protection Store below the labeled maximum temperature (typically 25 C to 30 C). Protect from light, moisture, and excessive heat; do not freeze.
Container & Integrity The medicine must be kept in its original container and the container must remain tightly closed to protect the contents until the expiry date.
Child Safety It is mandatory to keep this medicine out of the sight and reach of children to prevent accidental ingestion.
Disposal Unused or expired Mepasil should be returned to a pharmacy take-back program or official drug collection point. If these are unavailable, mix the medicine with an undesirable substance, place it in a sealed container, and discard it in the household trash. Do not dispose of in wastewater.

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

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