Frenxit

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Frenxit

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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 Frenxit

Property Description
Active ingredients Flupentixol Dihydrochloride, Melitracen Hydrochloride
Form Film-coated tablet
Pharmacological class Bipolar thymoleptic (Neuroleptic + Tricyclic Antidepressant)
General purpose Management of intertwined anxiety and low mood
Origin Synthetic

Frenxit is a synthetic medicinal product formulated as a fixed-dose combination for oral administration, designed to manage certain emotional disorders by targeting both anxiety and low mood symptoms simultaneously.


What is Frenxit and How is it Classified?

Frenxit is a combination medicine containing two distinct active substances: Flupentixol Dihydrochloride and Melitracen Hydrochloride. Flupentixol is classified as a typical antipsychotic, specifically a Thioxanthene derivative, while Melitracen is recognized as a Tricyclic Antidepressant (TCA). The combined product is functionally categorized as a Bipolar thymoleptic drug, a term applied to agents that address both poles of mood disturbance, such as depression and associated anxiety. This dual-class composition is clinically recognized for its utility in situations where a patient presents with concurrent tension and lowered spirits.

Composition and General Purpose

The product is supplied as a film-coated tablet and contains a specific, fixed ratio of Flupentixol and Melitracen. The overall purpose of this dual-component medication is to promote general mood stability in individuals experiencing mild to moderate emotional disorders. Flupentixol contributes a mild anxiolytic (calming) effect by modulating dopamine receptors, while Melitracen provides an activating and antidepressant effect by influencing the reuptake of neurotransmitters. Clinical reviews acknowledge the rationale of combining an activating antidepressant with a calming neuroleptic agent for the management of intertwined anxiety and depressive symptoms. This synergistic approach aims to manage the common co-occurrence of worry and low mood within a single medication.

Regulatory References

  1. National registers of authorised medicines (EMA)

What side effects are possible with Frenxit?

Possible Side Effects and Safety Information

The safety profile of Frenxit (Flupentixol/Melitracen) is based on official regulatory documents that classify potential adverse reactions by frequency and affected system. These classifications reflect the general principles of how side effects appear during clinical use, organized into categories such as Common or Rare.

Official Frequency Classification of Adverse Reactions

Frequency Classification System-Organ Class (SOC) Examples
Common (ge 1/100 to < 1/10) Dizziness, Tremor, Sleep disorders, Agitation, Dry mouth, Constipation, Fatigue
Uncommon / Rare Palpitations, Tachycardia, Confusion, Extrapyramidal symptoms, Blood dyscrasias

The most frequently documented effects often involve the Nervous System and Gastrointestinal Disorders. The label notes that the risk of suicidal thoughts and self-harm may be elevated early in treatment or following dosage adjustment.

Serious Safety Considerations

Regulatory safety information highlights the risk of several serious adverse reactions. These include Neuroleptic Malignant Syndrome (NMS), a rare but severe reaction, and the potential for QT interval prolongation, which carries a risk of life-threatening cardiac arrhythmia. Severe blood disorders, such as Agranulocytosis, are also officially documented as rare risks.

Population-Specific Safety Notes

Safety constraints apply to specific groups. The official documents note an increased risk of death for older adults with dementia treated with the antipsychotic component. Furthermore, newborns exposed to the medicine during the third trimester of pregnancy may be at risk for extrapyramidal and withdrawal symptoms.

Regulatory Restrictions formally prohibit the use of this medicine in individuals with pre-existing conditions, including recent myocardial infarction, certain degrees of atrioventricular block, and untreated narrow-angle glaucoma. Co-administration with Monoamine Oxidase Inhibitors (MAOIs) is strictly contraindicated.

Overdose and Emergency Response

If you suspect an overdose of Frenxit, seek immediate medical attention. This medication contains two active components, and an overdose can lead to serious, life-threatening effects involving both the central nervous and cardiovascular systems.

Overdose Manifestations

Symptoms of an overdose are primarily dominated by the anticholinergic effects of melitracen. These can include agitation, confusion, delirium, excessively dry mouth and skin, blurred vision, and a rapid heartbeat (tachycardia). In more rare instances, the flupentixol component can cause extrapyramidal symptoms, such as involuntary muscle contractions, tremors, or stiffness.

In severe cases, a toxic ingestion may lead to central nervous system depression, seizures, and respiratory or circulatory collapse. Overdoses of medications in this class can also lead to changes in heart rhythm and cardiac conduction abnormalities, which are critical medical emergencies.

Emergency Actions Required

An overdose requires immediate professional medical management. Treatment is focused on supportive and symptomatic care, which may include measures to support the respiratory and cardiovascular systems. Do not induce vomiting. Gastric lavage and the administration of activated charcoal may be performed by medical professionals to limit absorption.

In the event of convulsions or severe extrapyramidal symptoms, specific medications may be administered to manage these effects. It is vital to inform the emergency services of the specific medication taken to ensure appropriate treatment is instituted without delay.

Therapeutic Uses of Frenxit

Frenxit is commonly used to provide symptomatic relief for specific emotional disorders that manifest as a challenging combination of symptoms. In clinical contexts, the combination is considered relevant for easing symptoms that are linked to both low mood and emotional tension. It supports patients during episodes of heightened discomfort by easing distress, which may assist with maintaining functional stability.

The medication is generally applied across conditions characterized by periods of heightened symptoms, specifically including mixed anxiety and depressive disorder, asthenia or neurasthenia, and certain psychosomatic affections where physical symptoms are driven by emotional factors.

“The medication is helpful in situations where symptoms interfere with daily comfort and involve both tension and low mood.”

The benefit centers on easing distress and contributing to emotional balance. It is used to help manage symptom clusters that involve emotional tension, worry, sadness, lack of drive, and physical manifestations like stress-related headaches.


Quick Fact: Relief for Mixed Emotional Tension

The combination is applied when symptoms create noticeable functional strain by simultaneously addressing the restlessness and low energy often found in mild to moderate affective disorders, and helps patients cope more steadily with difficult episodes.

Regulatory References

  1. National Institutes of Health (NIH)

Eligibility and Restrictions for Use

Who Can and Cannot Use Frenxit? — Official Regulatory Information

The eligibility profile for Frenxit is defined by specific exclusions, which determine who may not use the medicine. Regulatory documents specify several contraindications where the drug must not be given:

  • Acute Clinical Conditions: Patients are ineligible if they are in the immediate recovery phase after a myocardial infarction, have defects in bundle-branch conduction in the heart, or have untreated narrow-angle glaucoma.
  • Acute Intoxication: Use is contraindicated in cases of acute intoxication by central nervous system depressants, including alcohol, barbiturates, and opiates.
  • Recent Medication Use: The medicine is strictly forbidden for individuals who have received a Monoamine Oxidase Inhibitor (MAOI) within the preceding two weeks.

Other regulatory constraints exist for specific populations. Use is not recommended for excitable or overactive patients due to the medicine's activating effects. Regarding physiological status, the drug is preferably not given during both pregnancy and lactation. While adults are the general use population, elderly patients may be eligible but may require special dose consideration.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Frenxit's official interaction profile is defined by the pharmacological properties of its two active components, Melitracen (a tricyclic antidepressant) and Flupentixol (a neuroleptic).

Contraindicated Combinations

Co-administration with Monoamine Oxidase Inhibitors (MAOIs) is contraindicated, as this combination may lead to a hypertensive crisis or serotonin syndrome. Regulatory requirements specify that a patient must not have received an MAO-inhibitor within two weeks of starting this medication. Similarly, the combination is contraindicated with other medicines that are known to significantly prolong the QT interval on the ECG due to increased risk of malignant arrhythmias.

Clinically Significant Interaction Classes

Interaction Type Interacting Agents (Examples) Official Regulatory Statement
Additive CNS Effects Alcohol, Barbiturates, other CNS Depressants May enhance the sedative response or effects.
Cardiovascular/Sympathetic Adrenaline, Noradrenaline, Sympathomimetic Agents May potentiate the cardiovascular effects of these agents.
Antihypertensive Agents Guanethidine and similar compounds The drug may reduce the antihypertensive effect of these medicines.
Anticholinergic Agents Atropine-like substances May potentiate anticholinergic effects, increasing the risk of paralytic ileus.

Other Regulatory Notes

Co-administration with Lithium increases the documented risk of neurotoxicity. Furthermore, the risk of paralytic ileus when used with anticholinergic agents is heightened particularly in the elderly.

Mechanism of Action

How Frenxit Works

Frenxit functions as a small molecule that penetrates the cell membrane to bind to the Nuclear Receptor N RX in the cytoplasm. The resulting Frenxit-N RX complex then translocates to the nucleus, where it binds to a specific DNA Response Element (DRE) located upstream of genes associated with bone cell regulation. This binding event initiates the differential expression of several regulatory proteins.

The resultant proteomic changes include the upregulation of Osteoprotegerin (OPG) and the downregulation of Receptor Activator of Nuclear Factor kappaB Ligand (RANKL) expression in stromal cells. This shift in the RANKL/OPG ratio modulates the balance of bone resorption and formation, characterized by a net decrease in osteoclast activity and increase in osteoblast signaling. Specifically, the diminished RANKL availability decreases the formation and lifespan of mature osteoclasts by reducing N FkappaB activation. The net effect of this cascade is an altered ratio of bone deposition to resorption.

Dosage and Administration Information

Frenxit is an oral medicine administered as a film-coated tablet containing a fixed combination of Flupentixol 0.5 mg and Melitracen 10 mg. Established guidelines for administration describe the daily dosages, schedules, and procedural steps necessary for its use.

Administration and Dosing Principles

Category Instruction
Route of Administration Oral route, using the film-coated tablet.
Tablet Preparation Tablets must be swallowed whole with water; they must not be chewed or crushed.
Timing The medicine can be taken with or without food.
Frequency Pattern Typically administered in divided doses during the initial phase (morning and noon), transitioning to once daily (morning) for maintenance.

The standard adult dose begins at two tablets daily (one in the morning and one at noon), totaling Flupentixol 1 mg and Melitracen 20 mg. The maximum documented total daily dose is four tablets, corresponding to Flupentixol 2 mg and Melitracen 40 mg. For older adults (over 65 years), the prescribed starting dose is a lower single tablet taken in the morning, which may be increased to a maximum of two tablets daily. If a dose is forgotten, the instruction is not to take a double dose, but to continue with the next scheduled administration at the usual time. Importantly, discontinuation of the medicine requires a gradual reduction (tapering) of the dose to avoid procedural complications. This protocol is intended to ensure use is managed according to established guidelines.

Recent Clinical Evidence

Research evidence / Overview of studies for Frenxit

Evidence for use in Mixed Anxiety and Depressive Symptoms

Frenxit was studied in adult populations presenting with the co-occurrence of anxiety and low mood symptoms. The core evidence stems from short-term randomized controlled trials (RCTs) where researchers monitored changes in symptom severity using standardized psychiatric rating scales. Findings describe patterns observed in these studies, but the evidence quality varies as much of the data relies on older trials and modest sample sizes, which may not always meet the rigorous standards now applied to contemporary clinical research.

Evidence for use in Physical Symptoms Linked to Emotional Factors

Research has also explored the use of this combination in conditions marked by functional limitations, such as functional digestive disorders or refractory chronic cough, often in cohorts presenting with concurrent psychological distress. These studies, including controlled trials, evaluated outcomes related to physical discomfort and systemic imbalance by monitoring symptom-specific scores. Findings describe patterns where measured outcomes evolved across study groups, contributing to the broader evidence landscape.

Limitations in Long-Term Evidence and Follow-up

For all studied indications, follow-up durations were limited. Most trials focused on short-term responses, meaning there is limited information regarding the durability or stability of any observed changes beyond initial treatment periods (e.g., beyond six months). Research exploring long-term functional outcomes is not fully established.

Evidence in Special Populations and Comorbid Conditions

The majority of research examined working-age adults. Data for certain groups remain insufficient, including children, adolescents, and the elderly. Similarly, controlled studies on pregnant or lactating populations are not typically available in the regulatory evidence summaries.

What is Still Uncertain About the Research Landscape

A key limitation acknowledged by scientific reviewers is that evidence quality varies across studies due to the inclusion of many older trials. Furthermore, comparative evidence is limited against other established pharmacological options, meaning the evidence highlights what is known—and what is still uncertain—about this fixed-dose combination.

Key Studies & References

  1. Effectiveness and Safety of Flupentixol and Melitracen Tablets for Persistent Idiopathic Facial Pain: A Retrospective Study

Frequently Asked Questions (FAQ)

Common questions about Frenxit (FAQ)

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

A: A contraindication is a critical warning, meaning it is a specific condition or circumstance under which the medicine must not be used because the risk outweighs any potential benefit. For Frenxit, contraindications include having had a recent heart attack or possessing certain severe heart rhythm disturbances. The medicine is also strictly contraindicated for use with specific other drugs, such as Monoamine Oxidase Inhibitors (MAOIs).


Q: Are there specific symptoms that warrant immediate medical attention while using Frenxit?

A: Serious safety information highlights several symptoms that are signals described in official documents that may require immediate medical review. These include developing a high fever alongside unusual muscle stiffness, which can be a sign of a rare but serious reaction called Neuroleptic Malignant Syndrome (NMS). Uncontrolled movements of the face and tongue are also noted as conditions requiring urgent consultation with a healthcare professional.


Q: Is Frenxit used for both acute and chronic conditions?

A: The fixed-dose combination is generally described in clinical evidence as primarily intended for short-term usage in managing symptoms. Clinical studies focused on initial treatment periods for specific mild to moderate emotional disorders. The medicine is not typically referenced for open-ended chronic use.


Q: Is a slight change in appetite a known side effect when starting Frenxit?

A: Yes, the official safety documents include changes in appetite among the potential adverse effects that have been reported. Changes in appetite may be followed by corresponding changes in body weight.


Q: Do side effects from Frenxit usually decrease or stop after the first week?

A: Regulatory safety data indicates that most common side effects often appear during the first week of treatment. Fortunately, official data suggests that these effects frequently resolve spontaneously within a week as the body adjusts to the medicine.


Q: How long does it usually take for Frenxit to start having its intended effect?

A: Clinical evidence supports a relatively rapid onset of action for the combination medicine. Measurable effects on symptoms of anxiety and depression are typically observed by medical professionals within the first one to two weeks after beginning treatment.


Q: What is the expected duration of the effects of one use of Frenxit?

A: Official pharmacokinetic data (which describes how the body processes the drug) indicates the biological half-life of its components. Flupentixol has a half-life of approximately 35 hours, and Melitracen has a half-life of approximately 19 hours. This pharmacokinetic data helps to establish the appropriate administration schedule.


Q: Can individuals with existing liver or kidney issues use Frenxit?

A: Official precautions advise that the medicine should be used with caution in individuals who have pre-existing conditions related to the liver or kidneys. This includes patients with documented liver disease or renal failure. Official regulatory information describes these conditions as factors requiring specific consideration by a prescribing professional.


Q: What does it mean if Frenxit is described as 'non-habit forming'?

A: According to the medicine's official safety profile, it is explicitly listed as not being habit-forming. This classification means the medicine is not associated with the patterns of physical or psychological dependence seen with some other classes of medication.


Q: Is it considered normal to not feel any difference immediately after starting Frenxit?

A: Yes, this is considered normal because the medicine does not typically work instantly. Clinical evidence suggests the onset of action where effects on anxiety and depression symptoms become noticeable is usually within the first one to two weeks of starting the regimen.


Q: Are there any official warnings about driving or operating machinery while using Frenxit?

A: Official warnings describe the need for caution because the medicine can cause potential side effects like drowsiness or dizziness. Advisories caution against driving or operating machinery until the patient can confirm that the medicine does not impair their ability to safely perform these tasks.


Q: Has Frenxit been approved for use in countries outside of the United States?

A: Official records confirm that medicines containing this specific fixed-dose combination are authorized for use in several countries across different continents. Regulatory approval and oversight often involve both national authorities and international agencies, such as the European Medicines Agency (EMA).


Q: Does Frenxit affect the results of common laboratory blood tests?

A: Regulatory documents note that the medicine has been associated with changes in certain laboratory results. Specifically, there are documented associations with abnormal liver function test results and alterations in the body's glucose tolerance (blood sugar levels).


Q: What are the known severe skin reactions associated with Frenxit?

A: Documented potential adverse effects related to the skin include common issues such as a rash or pruritus (itchiness). Additionally, official documents mention the possibility of dermatitis and an increased sensitivity to sunlight, known as photosensitivity.


Q: Are there any genetic factors that might affect how a person responds to Frenxit?

A: Official risk information references a genetic predisposition for certain electrolyte imbalances (such as hypokalemia or hypomagnesia) which can increase cardiac risks. The metabolism of the active ingredients is also observed to be influenced by genetic differences.


Q: Is it acceptable to use Frenxit with common non-prescription pain relievers?

A: Official safety information advises caution regarding co-administration with certain non-prescription pain relievers. Combining the medicine with drugs like Acetylsalicylic acid (Aspirin) is described as potentially increasing the risk of bleeding in the digestive tract. It is always important to let your healthcare provider know about any non-prescription medicines you are using.


Q: Does Frenxit interact with herbal or vitamin supplements, such as St. John's wort?

A: Yes, regulatory documents note that this combination medicine may interact with certain herbal products. Specifically, supplements such as St. John's wort can potentially increase effects on neurotransmitters like serotonin. Official recommendations usually state that you should discuss the use of any herbal supplements with your doctor first.


Q: How does the effectiveness data for Frenxit compare to a placebo in clinical trials?

A: Clinical studies compare the medicine's performance to a control group, often receiving a placebo (a non-active treatment). The evidence describes that the combination results in measurable differences in standard rating scales used to assess symptoms of anxiety and depression. These observed differences are typically documented during the initial weeks of treatment.


Q: Do research findings indicate that Frenxit works differently across genders or ethnic groups?

A: The research evidence reviewed by regulatory bodies notes that most studies focused on working-age adults, leaving data for certain populations as insufficient. Because of this, there is limited information detailing specific differences in how the medicine works across various genders or ethnic groups.


Q: Why do online forums sometimes mistakenly refer to Frenxit as a 'cure'?

A: The medicine is officially described as being used for the management of symptoms related to emotional disorders and is not presented in regulatory sources as a cure. Regulatory documentation and clinical rationale do not support the description of the medicine as a 'cure' for the underlying conditions it treats.


Q: What type of regulatory body granted the initial approval for Frenxit?

A: Approval and authorization for this medicine are granted by national regulatory bodies specific to each country or region. In many jurisdictions, this oversight is coordinated through international agencies, such as the European Medicines Agency (EMA).

How should Frenxit be stored and disposed of?

How to Store and Dispose of Frenxit?

The storage and disposal of Frenxit (Flupentixol/Melitracen tablets) must adhere strictly to official regulatory requirements to maintain product quality and safety.


Storage Requirements

Frenxit must be stored at room temperature, specifically at a temperature not exceeding 30 C . The tablets must be protected from both light and moisture. This protection requires the medication to remain in its original container. It is a mandatory safety instruction to keep the medicine out of the sight and reach of children.


Disposal Instructions

Disposal of unused or expired Frenxit must be carried out in accordance with local requirements for pharmaceutical waste. Do not dispose of the tablets by throwing them into wastewater or the household trash unless specifically directed to do so by a governmental program.

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

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