Frenxit Tablet 0.5 mg+10 mg
Frenxit Tablet 0.5 mg+10 mg Uses, Dosage, Side Effects, Food Interaction and all others data.
Flupenthixol primarily acts as a neuroleptic drug. The antipsychotic effect of Flupenthixol is achieved by mixed blockade of dopamine D1 and D2 receptors. In the mesolimbic dopamine system of the brain, this accounts for the antipsychotic action of this drug. Flupenthixol has other effects on CNS. In the chemoreceptor trigger zone, the dopamine blockade accounts for the antiemetic effect of the drug.
Melitracen is a tricyclic antidepressant. It blocks the neuronal re-uptake of both serotonin and nor-epinephrine in the central nervous system, there by minimizing the symptoms of depression.
| Trade Name | Frenxit Tablet 0.5 mg+10 mg |
| Generic | Flupentixol + Melitracen |
| Weight | 0.5 mg+10 mg |
| Type | Tablet |
| Therapeutic Class | Combined anxiolytics & anti-depressant drugs |
| Manufacturer | Beximco Pharmaceuticals Ltd. |
| Available Country | Bangladesh |
| Last Updated: | October 19, 2023 at 6:27 am |
Uses
Different types of anxiety, depression & apathy. These include- psychogenic depression, depressive neuroses, masked depression, psychosomatic affections accompanied by anxiety and apathy, menopausal depressions, dysphoria and depression in alcoholics and drug-addicts.
Frenxit Tablet 0.5 mg+10 mg is also used to associated treatment for these conditions: Chronic Schizophrenia, Depression, Dysphoria, NeurastheniaAnxiety, Depression, Schizophrenia and other psychotic disorders
How Frenxit Tablet 0.5 mg+10 mg works
The mechanism of action of flupentixol is not completely understood. The antipsychotic actions are mainly thought to arise from cis(Z)-flupentixol, the active stereoisomer, acting as an antagonist at both dopamine D1 and D2 receptors with equal affinities. Schizophrenia is a mental illness characterized by positive (such as hallucinations and delusions) and negative (such as affect flattening and apathy) symptoms. While several neurotransmitter systems are implicated in the pathophysiologic processes leading to the development of symptoms, the dopamine and glutamate systems have been extensively studied. It is generally understood that positive symptoms of schizophrenia arise from a dysregulated striatal dopamine pathway, leading to hyperstimulation of D2 receptors. Many antipsychotic agents work by blocking D2 receptors as antagonists; similarly, cis(Z)-flupentixol, the active stereoisomer, is an antagonist at D2 receptors. However, there is now evidence that antipsychotic agents can work by blocking other dopamine receptor subtypes, such as D1, D3, or D4 receptors. One study showed that cis(Z)-flupentixol is an antagonist at both dopamine D1 and D2 receptors with equal affinities, and binds to D3 and D4 receptors with lower affinities. It also binds to alpha-1 adrenoceptors. Antidepressant effects of flupentixol are understood to be mediated by antagonism at 5-HT2A receptors, which are commonly downregulated following repeated antidepressant treatment. Flupentixol also binds to 5-HT2C receptors.
Dosage
Frenxit Tablet 0.5 mg+10 mg dosage
Adults: In general 2 tablets per day, morning and at midday. For the severe cases, the amount of the morning dose can be increased to 2 tablets.
Elderly patients: One tablet in the morning.
Maintenance dose: 1 tablet in the morning. In cases of insomnia or severe restlessness additional treatment with a sedative in acute phase is recommended.
Side Effects
In the recommended doses side effects are rare. These could be transient restlessness and insomnia.
Toxicity
The oral LD50 is 423 mg/kg in mice and 791 mg/kg in rats. The intravenous LD50 is 37 mg/kg in rats.[L31873]
Flupentixol overdose is characterized by sedation, frequently preceded by extreme agitation, excitement, confusion, somnolence, coma, convulsions, and hyperthermia or hypothermia. Extrapyramidal symptoms or respiratory and circulatory collapse may be observed. ECG changes, QT prolongation, Torsades de Pointes, cardiac arrest and ventricular arrhythmias have been reported from the combined use of drugs known to affect the heart with large doses of flupentixol. In case of overdose, symptomatic treatment should be initiated with airway management. In case of severe hypotension, epinephrine should not be used: instead, intravenous vasopressor drugs, such as levarterenol, can be used. Antiparkinsonian medication should be administered only if extrapyramidal symptoms develop. Gastric lavage should be initiated in the case of flupentixol tablet overdose. Further injections of flupentixol should be discontinued in case of an intramuscularly-administered drug overdose until the patient shows signs of relapse, in which the dosage can subsequently be decreased.
Neuroleptic malignant syndrome is associated with neuroleptic drugs, which should be responded to with immediate discontinuation of the drug and initiation of symptomatic treatment and medical monitoring.
Precaution
If previously the patient has been treated with tranquilizers with sedative effect these should be withdrawn gradually.
Interaction
Flupentixol-melitracen may enhance the response to alcohol, barbiturates and other CNS depressants. Simultaneous administration of MAO-inhibitors may cause hypertensive crises. Neuroleptics and thymoleptics reduce the antihypertensive effect of guanethidine and similar acting compounds and thymoleptics enhance the effects of adrenaline and noradrenaline.
Volume of Distribution
The apparent volume of distribution is about 14.1 L/kg. Following administration, the highest levels of flupentixol are found in the lungs, liver, and spleen. Lower concentrations of the drug are found in the blood and brain.
Elimination Route
Following oral administration, flupentixol is readily absorbed from the gastrointestinal tract, with oral bioavailability of about 40%. Tmax ranges from three to eight hours. Steady-state plasma levels are achieved in about seven days and following once-daily oral administration of 5 mg flupentixol, the mean minimum steady-state level was about 1.7 ng/mL (3.9 nmol/L).
From the site of intramuscular injection, esterified flupentixol diffuses slowly from the oil solution and is slowly released into the extracellular fluid and the circulation to be distributed to different tissues. Peak drug concentrations are reached between four and seven days following intramuscular injection. Intramuscularly administered flupentixol is detectable in the blood three weeks after injection and reaches steady-state concentrations after about three months of repeated administration.
Half Life
The elimination half-life is about 35 hours following oral administration and three weeks following intramuscular administration.
Clearance
Following oral administration, the mean systemic clearance is about 0.29 L/min.
Elimination Route
Fecal excretion is more predominant than renal excretion. In the feces, flupentixol is recovered in the feces mainly as the unchanged form, as well as its lipophilic metabolites, such as dealkyl-flupentixol. Flupentixol is recovered in the urine as the unchanged form as well as its hydrophilic sulfoxide and glucuronide metabolites.
Pregnancy & Breastfeeding use
Flupentixol and Melitracen should preferably not be given during pregnancy and lactation.
Contraindication
The immediate recovery phase after myocardial infarction. Defects in bundle-branch conduction. Untreated narrow angle glaucoma. Acute alcohol, barbiturate and opiate intoxication. Flupentixol and Melitracen should not be given to patients who have received a MAO inhibitor within two weeks. Not recommended for excitable patient since its activating effect may lead to exaggeration of these characteristics.
Special Warning
Children: This tablet is not for paediatric use.
Storage Condition
Should be stored at a cool and dry place, protect from light and moisture.
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