Orfiril long

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Orfiril long

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Orfiril long

Quick Facts

Property Description
Active ingredient Valproic Acid (often as Sodium Valproate)
Form Prolonged-release tablet
Pharmacological class Anticonvulsant, Mood stabilizer
Common use Regulation of neuronal excitability
Origin Synthetic chemical entity

Defining Orfiril long: Composition and Class

Orfiril long is a specific synthetic, prescription-only medicine whose active component is Valproic Acid, frequently formulated as Sodium Valproate for enhanced stability. It belongs to the pharmacological class of broad-spectrum antiepileptic drugs (AEDs) and is clinically recognized for its established efficacy as a mood stabilizer in certain neurological conditions. The dual classification of Valproate confirms its role in modulating central nervous system activity. This medicine is often utilized in patient groups requiring simultaneous stabilization of both neuronal hyperactivity and mood states.

The Role of the Prolonged-Release Formulation

The name "Orfiril long" emphasizes a distinguishing feature: the drug is supplied as a prolonged-release tablet, a modified-release preparation intended for oral administration. This extended-release formulation is a key differentiating factor from immediate-release Valproate products, offering a distinct patient benefit. The tablets are specifically engineered to control the rate at which the active Valproate is released into the body. This controlled-release profile ensures the maintenance of a consistent and steady concentration of the active substance in the bloodstream over an extended period, which is designed to optimize continuous therapeutic effect and improve patient management.

General Action and Purpose of Valproate

The general action of Valproate is centered on stabilizing overly active nerve signals in the brain. This is primarily achieved by enhancing the effects of the inhibitory neurotransmitter GABA, effectively acting to increase the dampening influence on neuronal excitability. The overall purpose of Valproate, therefore, is to restore a more balanced state of nerve function in the central nervous system, mitigating the risk of rapid and uncontrolled electrical discharges.

Regulatory References

  1. as documented by the NIH

What side effects are possible with Orfiril long?

Possible Side Effects and Safety Information

The safety profile for Orfiril long (valproate/valproic acid) is characterized by a range of documented adverse reactions and significant population-specific restrictions as detailed in official regulatory documents.

Serious Safety Risks

Official labeling highlights the risk of severe, potentially fatal hepatic (liver) failure/damage and severe, potentially fatal pancreatitis (inflammation of the pancreas). These are considered life-threatening serious adverse reactions and necessitate immediate discontinuation and prompt medical evaluation upon suspicion. Liver function testing is required before starting treatment and frequently during the initial six months, particularly for patients at higher risk, such as very young children.

Population-Specific Restrictions and Contraindications

The drug is subject to strict safety-related restrictions due to major risks, especially concerning reproduction. It is generally contraindicated in female children and women of childbearing potential unless the terms of a comprehensive Pregnancy Prevention Programme are strictly followed. This is due to the high risk of teratogenicity (birth defects) and neurodevelopmental disorders following exposure in utero.

Furthermore, the risks of severe liver damage are greatest in the pediatric population, particularly in children under three years of age and those receiving multiple medications. Contraindications also include hypersensitivity to the drug, active liver disease, a personal or family history of severe liver dysfunction, and known urea cycle disorders.

Common Adverse Reactions

Adverse reactions are classified by frequency based on regulatory standards. Very common adverse reactions (occurring in 1 in 10 or more patients) often include tremors, nausea, and weight gain. Common reactions (occurring in 1 in 100 to less than 1 in 10 patients) often involve blood and lymphatic system disorders, confusion, hair loss (alopecia), and gastrointestinal disturbances.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdosage of Orfiril long is a life-threatening medical emergency and is considered potentially fatal, primarily due to severe effects on the central nervous system (CNS).

Documented Overdose Presentations

Massive overdosage, which is often associated with plasma concentrations exceeding the therapeutic range, can result in:

  • Central Nervous System Depression: This manifests as a deep, profound coma, accompanied by reduced muscle tone (muscular hypotonia) and diminished reflexes (hyporeflexia).
  • Respiratory and Cardiovascular Effects: Impaired respiratory function and breathing difficulties are a significant risk. Low blood pressure (hypotension) may also occur.
  • Metabolic Disturbances: Overdose can lead to metabolic acidosis (an imbalance of the body's acid-base status). Pupil constriction (miosis) is a reported sign.

Urgent Emergency Action

Immediate medical help or contact with a poison control center must be sought immediately if an overdose is suspected or confirmed. Do not wait for severe symptoms to appear. Due to the high risk of respiratory depression and coma, hospital treatment is generally necessary for close monitoring and symptomatic management.

Specific interventions may include supporting cardiopulmonary and cerebral function and, in some cases, the administration of a specific antidote or enhanced drug elimination procedures to reduce plasma concentrations.

Therapeutic Uses of Orfiril long

Orfiril Long (Valproate) is commonly used for managing symptoms and supporting stability across key neurological and psychiatric domains. Its therapeutic goal is to assist with the management of symptom frequency, intensity, and functional strain.

Therapeutic Uses and Benefits

Epilepsy and Seizure Management

The medication is relevant for managing symptoms related to heightened neurological or muscular activity in conditions involving epilepsy. It is applied across domains where additional symptomatic support is needed, which may support general well-being during symptomatic phases.

Acute Mood Stabilization

Orfiril Long is applied for addressing pronounced symptoms of mania associated with Bipolar Disorder. It is relevant when supportive symptom management is appropriate, as it assists with managing mood symptoms that interfere with daily comfort. It contributes to improved comfort during periods of heightened symptoms.

Preventative Relief for Head Pain

It is also used in the prophylaxis (prevention) of chronic migraine headaches. This provides support that helps ease the overall symptom burden by addressing symptoms that become more disruptive during flare-ups.

Quick Fact: Supportive Management for Symptoms Related to Neurological Activity

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Orfiril long — Official Regulatory Information

Category Official Regulatory Statement
Populations for whom use is allowed Adults and pediatric patients (generally over age thresholds) for approved indications.
Populations for whom use is not recommended Breastfeeding mothers; children under 10 years old for migraine prophylaxis.
Populations for whom use is contraindicated Patients with known hepatic disease or significant hepatic dysfunction; patients with known or suspected Urea Cycle Disorders; patients with certain mitochondrial disorders (POLG mutations); and patients with hepatic porphyria.
Age-related eligibility rules Use in children under 2 years old carries a considerably higher risk of fatal hepatotoxicity and is generally restricted. Older adults require a lower starting dose and cautious monitoring.
Pregnancy and lactation eligibility status Women of childbearing potential are strictly contraindicated unless compliant with the official Pregnancy Prevention Programme (PPP). The medicine is absolutely contraindicated for pregnant women being treated for migraine prophylaxis.
Eligibility-related restrictions Use in pregnant women with epilepsy is highly restricted, permitted only if other treatments are ineffective or not tolerated. Patients with coagulation disorders require caution.

Connection to the overall eligibility profile

Regulatory documents define who can and cannot use Orfiril long by establishing absolute contraindications tied to severe metabolic and hepatic risks. The most severe restrictions apply to women of childbearing potential, where use is prohibited unless stringent risk-reduction measures, such as the Pregnancy Prevention Programme, are fully met.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Orfiril long (Valproate) has officially documented interactions primarily revolving around the modification of drug clearance and pharmacodynamic additive effects, as detailed in regulatory prescribing information.


Official Interaction Profile

Interaction Type Interacting Substances/Examples
Exposure-Altering (Increased Clearance) Hepatic enzyme inducers like Phenytoin, Carbamazepine, and Rifampin officially increase Valproate clearance, potentially reducing plasma concentration.
Exposure-Altering (Decreased Clearance) Enzyme inhibitors, such as Felbamate, and protein binders like Aspirin, are documented to decrease Valproate clearance, which may increase Valproate exposure.
High-Risk Pharmacodynamic Effect Co-administration with Topiramate is associated with a specific, officially recognized risk of hyperammonemia and encephalopathy.
Additive CNS Depression Concomitant use with other CNS depressants may result in a documented additive CNS depressant effect, requiring caution.
Effect on Other Medicines Valproate can inhibit the metabolism of certain co-administered antiepileptics, including Lamotrigine and Phenytoin.

Interaction-Related Restrictions and Constraints

The label notes that the use of Carbapenem antibiotics (e.g., Meropenem) is documented to cause a rapid reduction in Valproate levels, necessitating the monitoring of concentrations. Additionally, St. John's Wort, an enzyme inducer, is listed as capable of increasing Valproate clearance. The drug is contraindicated for migraine prophylaxis in women of childbearing potential not using effective contraception.

Mechanism of Action

Orfiril long, containing valproate, functions through multiple, distinct molecular targets within the central nervous system. The primary actions involve the modulation of gamma-aminobutyric acid (GABA) signaling and the attenuation of excitatory neurotransmission.

Valproate elevates GABA levels by inhibiting GABA transaminase (GABA-T), the enzyme responsible for the catabolism of GABA, thereby reducing GABA degradation in the synaptic cleft. Concurrently, it may modulate the synthesis and release of GABA. This potentiates GABA-mediated inhibitory neurotransmission and hyperpolarizes neuronal membranes.

In parallel, valproate directly inhibits voltage-gated sodium channels ( Na^+ channels) in a use-dependent manner, thereby stabilizing the neuronal membrane against high-frequency firing. This restriction of Na^+ influx limits the propagation of action potentials. Furthermore, the molecule can modulate T-type calcium channels ( Ca^2+ channels), reducing Ca^2+ influx and subsequent neurotransmitter release.

Downstream intracellular consequences include reduced intracellular Ca^2+ signaling and attenuated cellular excitability. The system-level physiological consequence of these actions is a generalized modulation of central neuronal network activity and a stabilization of membrane potentials across various brain regions.

Dosage and Administration Information

How to Use Orfiril long

Orfiril long is a prolonged-release formulation of Valproate administered exclusively via the oral route. The active substance, Valproate, may be administered intravenously (IV) only as a temporary alternative when oral intake is not feasible, and use via this route is generally restricted to short durations, typically not exceeding 14 days.


Dosing and Schedule

Treatment follows a phased approach that begins with a low starting dose that is gradually titrated (increased) over several days to weeks to achieve the necessary stable daily regimen. The prolonged-release formulation is structured for once-daily administration, often taken in the evening, though high doses may be taken in two divided doses. The standard adult maintenance dosage typically ranges from 1,000 mg to 2,000 mg daily.

Administration Principle Procedural Detail
Physical Handling Prolonged-release tablets must be swallowed whole and must not be crushed, split, or chewed, as this would compromise the modified-release mechanism.
Intake Conditions The medicine can be taken with or without food, but maintaining a consistent daily timing is recommended.
Missed Doses If a dose is missed, it should be skipped if the next scheduled dose is near, and the subsequent dose should be taken at the usual time; the dose should never be doubled to compensate.

Population-Specific Adjustments

Instructions require specific dose modifications for certain groups. For older adults, the starting dose should be reduced, and the titration to the maintenance dose must be conducted more slowly. Similarly, dose adjustments are required for patients with renal impairment, based on clinical monitoring.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Orfiril long

This overview describes the types of research that have explored the use of the active component in Orfiril long, Valproate. This information summarizes the structure of the evidence base, the specific patient groups that was studied for each use, and areas where data are still emerging or uncertain.


Evidence for use in Epilepsy and Seizure Management

The research base includes studies of conditions characterized by episodic or acute changes in brain activity, including Randomized Controlled Trials (RCTs) and Systematic Reviews. These studies focused on both Adults and Adolescents (typically ge 10 or ge 12 years old). Researchers examined how seizure patterns changed, often classifying findings based on whether patients had a specified seizure frequency reduction or had periods of seizure freedom over particular assessment periods.

While evidence exists, there remains limited information from trials directly assessing the transition or equivalence between different prolonged-release Valproate formulations. Furthermore, the follow-up durations were limited in some trials, and data concerning certain outcomes reflecting daily functioning or activity level for all relevant subgroups are still being developed.


Evidence for use in Acute Mood Stabilization

The research relevant to managing conditions characterized by fluctuating or episodic manifestations, such as Bipolar Disorder, includes short-term and long-term Randomized Controlled Trials and their associated Systematic Reviews. These studies involved Adults during both phases of increased symptom activity and long-term follow-up for maintenance.

For long-term management, studies explored the pattern of recurrence, monitoring the risk of new manic or depressive episodes. A noted limitation is that some older comparative evidence is lacking detail, as some trials were designed without blinding.


Key Limitations and Areas for Further Research

The evidence base contains various studies, yet several research limitation frames apply across the uses of Valproate. Comparative evidence is lacking for certain head-to-head comparisons against newer medications for both mood stabilization and head pain prevention.

Furthermore, long-term effects are not fully established for all outcomes, as many initial follow-up durations were limited. Research continues to examine outcomes related to systemic or functional imbalance in more diverse patient subgroups, as data for certain groups remain insufficient. This continued research is designed to address these recognized gaps.

Key Studies & References Valproic Acid Drug Information - MedlinePlus

Frequently Asked Questions (FAQ)

Common questions about Orfiril long (FAQ)


Q: What is the main difference between Orfiril long and regular Orfiril?

A: Orfiril long is a prolonged-release, or modified-release, formulation. Official product information states this design is intended to release the active substance at a controlled rate.

This results in a more constant and steady concentration of the medicine in the bloodstream over an extended period, which differentiates it from immediate-release formulations.


Q: Does Orfiril long affect birth control pills?

A: Regulatory guidance indicates that valproate is generally not associated with reducing the effectiveness of hormonal contraceptives, such as birth control pills.

However, due to the high risk of serious harm to an unborn baby, patients of childbearing potential are typically required to use highly effective contraception as part of an official Pregnancy Prevention Programme.


Q: What does official guidance say about driving or operating machinery while taking this medicine?

A: Official guidance advises that this medicine may cause side effects such as drowsiness, dizziness, or blurred vision.

Official guidance generally advises caution regarding driving or operating machinery until they know how the medicine affects them and feel fully alert and coordinated.


Q: Can I stop taking Orfiril long if I feel better?

A: Regulatory information indicates that abrupt cessation of this medicine is generally not advised without first consulting their healthcare professional, even if they feel better.

Abrupt discontinuation can lead to serious risks, such as a sudden return of seizures or symptoms.


Q: Does Orfiril long interact with any specific anti-depressant medications?

A: Regulatory-supported research indicates interactions may occur with certain antidepressant medications, such as some tricyclic antidepressants.

These interactions can lead to changes in the levels of the antidepressant in the blood, and clinical monitoring may be necessary.


Q: Can Orfiril long cause or worsen anxiety?

A: Official safety warnings advise monitoring for the emergence or worsening of symptoms such as feeling anxious, agitated, or panicky.

Regulatory guidance indicates these changes are subject to monitoring, particularly when starting treatment or after a dose change.


Q: Does Orfiril long affect sleep patterns?

A: Evidence suggests that the use of the active component in Orfiril long may be associated with disturbances in sleep patterns.

This has been linked in some reports to issues such as sleep apnea and increased daytime somnolence.


Q: What is the typical time frame for the drug to clear the system if stopped?

A: The time frame for the drug to be processed by the body is measured by its elimination half-life.

According to official product information, the half-life of the active ingredient, valproate, is typically described as being between 9 and 16 hours in adults.


Q: Is Orfiril long associated with any skin reactions or rashes?

A: Official safety information includes warnings about the possibility of serious skin reactions.

These can include rashes, blisters, peeling skin, and swelling of the face or lymph nodes. Official guidance describes these reactions as serious and states that prompt medical evaluation is necessary if they appear.


Q: Do I need to carry a special alert card while taking Orfiril long?

A: Regulatory programmes outline that a special Patient Card or Alert Card is typically provided to patients.

This is primarily for women of childbearing potential to ensure they understand the associated risks and necessary precautions.


Q: What does the drug's safety information say about effects on fertility?

A: Official regulatory documents acknowledge concerns that the medicine may affect male fertility.

This may potentially impact the amount and movement of sperm. Regulatory information describes restrictions on sperm donation for men taking the medicine.


Q: Does taking Orfiril long make you more sensitive to the sun?

A: Official safety information includes a caution that this medicine may increase sensitivity to the sun (photosensitivity).

Official documents suggest taking protective measures, such as using sunscreen or avoiding direct sunlight, if increased sensitivity occurs.


Q: What official warnings exist about potential for suicidal thoughts with Orfiril long?

A: Official warnings highlight that antiepileptic drugs, including this medicine, increase the risk of suicidal thoughts or behavior.

Regulatory guidance emphasizes that close monitoring for the emergence or worsening of depression, unusual changes in mood, or suicidal ideation is necessary.


Q: Are there any specific foods or drinks that should be avoided while taking Orfiril long?

A: While the medicine can generally be taken with or without food, there is caution regarding substances that cause additive central nervous system (CNS) depressant effects.

This would include alcohol, due to the potential for increased drowsiness or sedation.


Q: Is it normal to feel tired or drowsy after starting Orfiril long?

A: Official product information lists somnolence (drowsiness) and dizziness as common adverse events associated with this medicine.


Q: What are the serious but rare side effects of Orfiril long?

A: Official safety documents highlight the risks of severe, potentially fatal hepatic (liver) failure and pancreatitis (inflammation of the pancreas).

These are documented as serious risks requiring immediate medical attention, although their exact frequency is not always precisely classified as 'rare.'


Q: What kind of monitoring is typically needed when starting Orfiril long?

A: Regulatory documents describe that liver function tests are typically required before starting treatment and frequently during the initial six months.

Monitoring of platelet counts and coagulation tests is also recommended.


Q: Does Orfiril long affect mental clarity or memory?

A: Official safety documentation lists confusion as a documented adverse reaction.

In some cases, amnesia (memory loss) has also been reported.


Q: Why are children given different dosages or forms of Orfiril long?

A: The need for population-specific adjustments and restricted use in young children is related to the documented risk of severe hepatotoxicity (liver damage).

This risk is significantly higher in the pediatric population, especially those under two years of age.


Q: What information is available about the long-term use of Orfiril long?

A: Regulatory information indicates that the medicine is subject to additional monitoring by regulatory authorities.

This process is put in place to ensure the quick identification and evaluation of new safety information as long-term use continues.


Q: Why do doctors switch patients from immediate-release to the 'long' formulation?

A: The prolonged-release formulation is designed to maintain a consistent and steady concentration of the medicine in the bloodstream over an extended period.

This controlled release profile is intended to optimize continuous therapeutic effect and potentially improve patient management.


Q: What are the main findings from clinical trials of Orfiril long?

A: Clinical research has examined various endpoints to determine the drug's effect.

These include how often seizure patterns changed, and in mood disorders, whether there was a reduction in the chance of new manic or depressive episodes.


Q: How is the long-term safety profile described in regulatory documents?

A: The long-term safety profile is continually evaluated by regulatory bodies.

The medicine is subject to additional monitoring to ensure the quick identification of any new safety information that emerges over time.


Q: Do studies suggest that Orfiril long is effective for migraine prevention?

A: The medicine is one of the medications primarily used to prevent migraine headaches in approved patient populations.

This is in addition to its established uses in epilepsy and mood stabilization.

How should Orfiril long be stored and disposed of?

How to Store and Dispose of Orfiril long?

Regulatory documents mandate strict adherence to labeled conditions to ensure the stability and safety of Orfiril long (Valproate prolonged-release tablets).

Storage Requirement Official Condition
Temperature Store at room temperature, typically below 25 C or 30 C; do not freeze.
Protection Keep in the original container and shield from moisture and light.
Security Always keep the medicine out of the sight and reach of children.

For disposal, do not throw away unused or expired Orfiril long tablets in household trash or pour them into wastewater. The official protocol requires disposal through established pharmaceutical take-back programs or as instructed by local waste regulations.

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

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