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HomeHealth articlesmyoclonic seizureIs Stiripentol an Effective Adjunctive Therapy for Myoclonic Epilepsy Management?

Stiripentol for Myoclonic Epilepsy: A Comprehensive Guide to its Efficacy and Usage

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Stiripentol is a potential supplement to other treatments for myoclonic epilepsy. Read this article to learn more about the drug.

Medically reviewed by

Dr. Basuki Nath Bhagat

Published At April 18, 2024
Reviewed AtApril 18, 2024


Myoclonic epilepsy is a complex neurological disorder that triggers sudden muscle contractions or jerks (myoclonus) throughout different body parts involuntarily. Effectively managing this condition can be quite challenging and often necessitates the use of pharmacological interventions in order to control the frequency and intensity of myoclonic seizures. Stiripentol stands out as a medication that has demonstrated efficacy when used alongside other antiepileptic drugs for addressing myoclonic epilepsy. This comprehensive article aims to provide an all-encompassing overview of Stiripentol by delving into its approval status, available doses, dosage forms, mechanism of action details about proper administration techniques, associated side effects, and dietary considerations. Also provided are guidelines on handling missed doses or possible overdoses and instructions regarding appropriate storage requirements.

Drug Approval:

Stiripentol received approval from regulatory authorities for the treatment of myoclonic epilepsy in certain countries. Its approval was based on clinical trials that demonstrated its efficacy and safety when used as adjunctive therapy in patients with myoclonic epilepsy.

Available Doses and Dosage Forms:

Stiripentol is available in specific doses and dosage forms. The available doses and dosage forms may vary depending on the country and pharmaceutical manufacturer. It is important to follow the specific instructions the healthcare provider provides and refer to the medication packaging for accurate dosing information. The following are common doses and dosage forms of Stiripentol:


Stiripentol is commonly available in capsule form. The capsules may come in different strengths, such as 250 mg or 500 mg (milligrams).

The healthcare provider will determine the specific dosage and frequency of Stiripentol based on various factors, including the patient's age, weight, individual response, and the presence of any other medical conditions. It is important to strictly adhere to the prescribed dosage and administration instructions provided by the healthcare provider.

For Patients:

What Is Myoclonic Epilepsy?

Myoclonic epilepsy is a neurological disorder characterized by sudden, brief muscle contractions or jerks (myoclonus). These jerks can occur spontaneously or in response to external stimuli and may affect different parts of the body. Myoclonic epilepsy is a subtype of epilepsy and is often co-occurring with other seizure types.

How Does Stiripentol Work?

Stiripentol's exact mechanism of action in the treatment of myoclonic epilepsy is not fully understood. However, it is believed to enhance the inhibitory effects of the brain's neurotransmitter called gamma-aminobutyric acid (GABA). By increasing GABAergic inhibition, Stiripentol helps to reduce the abnormal electrical activity that leads to myoclonic seizures.

What Is the Dosage of Stiripentol?

The dosage of Stiripentol may vary depending on several factors, including the patient's age, weight, and individual response to the medication. It is vital to remember to take the medicine exactly as directed by the physician. In most cases, the dosage starts low and rises slowly until the seizures are under control.

How Effective Is Stiripentol?

Clinical studies have shown that when used as an adjunctive therapy, Stiripentol can significantly reduce the frequency and severity of myoclonic seizures in patients with myoclonic epilepsy. However, the effectiveness may vary from individual to individual, and monitoring the response to treatment is important.

What Are the Things to Inform the Doctor Before Taking Stiripentol?

Before taking Stiripentol or any medication, it is important for individuals or patients to inform their doctor about their complete medical history and any relevant information. Here are some key things individuals should consider discussing with their doctor:

  • Current Medications: Inform the doctor about all the medications the individual is currently taking, including prescription drugs, over-the-counter medications, and herbal supplements. This is important because certain medications can interact with Stiripentol and cause adverse effects.

  • Allergies: If the individual has any known allergies, especially to Stiripentol or other cannabinoids, they should inform their doctor. It is essential to ensure that the medication is safe for them to use.

  • Medical Conditions: Inform the doctor about any pre-existing medical conditions the individual has, such as heart disease, liver problems, mental health disorders, or a history of substance abuse. Certain medical conditions may require special monitoring or adjustments to the dosage.

  • Pregnancy or Breastfeeding: Talking to a doctor is essential if the person is pregnant, trying to get pregnant, or breastfeeding. Because of the lack of research on Stiripentol's effects on developing fetuses and newborns, one must think twice before taking it while expecting or nursing.

  • Previous Substance Use: Inform the doctor if the individual has a substance abuse or dependence history. Stiripento may have abuse potential, so it is important to discuss this with the doctor to ensure it is prescribed appropriately.

  • Other Important Considerations: Inform the doctor about any other relevant information, such as if the individual is planning to undergo surgery or any upcoming medical procedures.

By discussing these details with their doctor, individuals will provide the doctor with a comprehensive understanding of their medical history. The doctor can then make an informed decision regarding the use of Stiripentol for managing chemotherapy-induced nausea and vomiting or any other condition.

How Is Stiripentol Administered?

Stiripentol is administered orally in the form of capsules. The capsules should be swallowed whole with water and can be taken with or without food, as directed by the healthcare provider. It is important to adhere to the prescribed dosage and administration instructions.

What Are the Side Effects of Stiripentol?

Side effects of Stiripentol can vary in severity and may affect individuals differently. It is important to note that not all individuals will experience these side effects, and some may experience no side effects at all. If any side effects are experienced, it is essential to inform the healthcare provider promptly. Common side effects of Stiripentol may include:

  • Drowsiness: Stiripentol's most often reported adverse effect is drowsiness or fatigue. Everyday tasks like driving or running machines could be impacted.

  • Dizziness: Some individuals may experience feelings of dizziness or lightheadedness while taking Stiripentol. To avoid falls or accidents, it is important to be cautious when getting up from a sitting or lying position.

  • Loss of Appetite: Stiripentol may cause a decrease in appetite, resulting in reduced food intake. Maintaining proper nutrition during treatment is important, and if significant appetite loss occurs, it should be discussed with the healthcare provider.

  • Weight Loss: Some individuals may experience weight loss while taking Stiripentol. Regular monitoring of weight is important, especially in children, to ensure appropriate growth and development.

  • Gastrointestinal Disturbances: Nausea, vomiting, and diarrhea are potential gastrointestinal side effects associated with Stiripentol use. Staying hydrated and discussing these symptoms with the healthcare provider can help manage these effects.

  • Behavioral Changes: Stiripentol can occasionally lead to behavioral changes, such as irritability, aggression, or mood swings.

  • Skin Reactions: Rarely allergic skin reactions, such as rash or itching, may occur as a side effect of Stiripentol. Any unusual skin reactions should be promptly reported to the healthcare provider.

  • Elevated Liver Enzymes: Stiripentol use may cause elevated liver enzymes, which can be detected through blood tests. Regular liver function monitoring is recommended during treatment.

  • Other Potential Side Effects: Less commonly reported side effects of Stiripentol include headache, fatigue, constipation, muscle weakness, coordination difficulties, and respiratory infections.

Dietary Considerations:

Dietary considerations related to the use of Stiripentol include:

  • Food Interactions: Stiripentol may interact with certain foods, potentially affecting its absorption or metabolism. It is important to discuss any specific dietary considerations or restrictions with the healthcare provider to ensure optimal drug effectiveness.

  • Grapefruit Juice: Grapefruit juice can inhibit the activity of enzymes involved in the metabolism of Stiripentol. Avoiding grapefruit juice is usually advised while taking Stiripentol, as it may result in heightened medication levels and potential side effects. Other citrus juices, such as orange juice, do not have the same interaction and can be consumed.

  • High-Fat Meals: Taking Stiripentol with a high-fat meal may increase its absorption and bioavailability. However, this may also lead to higher blood levels of the medication, potentially increasing the risk of side effects. Patients should follow the specific instructions provided by their healthcare provider regarding the timing of Stiripentol administration with or without food.

  • Balanced Diet: Individuals with epilepsy must maintain a balanced and healthy diet to promote overall health and well-being. Consuming a broad range of healthy and nourishing foods like fruits, vegetables, whole grains, lean proteins, and healthy fats can enhance overall health and potentially improve epilepsy management. Nevertheless, recommended dietary guidelines may vary depending on an individual's specific requirements and medical conditions.

  • Alcohol and Caffeine: Consuming alcohol and caffeine can have an impact on seizure control and may interfere with medications used to treat epilepsy. It is usually recommended to restrict or abstain from alcohol and caffeine consumption and to consult with a healthcare professional regarding any individual concerns.

  • Timing of Medication: Patients should follow the prescribed dosing schedule and take Stiripentol consistently with regard to meal times, as instructed by their healthcare provider. This helps to maintain consistent blood levels of the medication and optimize its effectiveness.

Individual dietary considerations may vary depending on factors such as age, overall health, concomitant medications, and specific medical conditions. It is important to consult with a healthcare professional or a registered dietitian to address any specific dietary concerns and to ensure an appropriate and individualized approach to nutrition during Stiripentol therapy.

Missed Dose:

If a dose of Stiripentol is missed, it should be taken as soon as remembered unless it is close to the time for the next scheduled dose. If a dose is missed, skipping it and continuing with the regular dosing schedule is best. Never take double doses to compensate for the missed one.


In the event of a suspected Stiripentol overdose, immediate medical attention should be sought. Overdose symptoms may include severe drowsiness, confusion, difficulty breathing, and changes in heart rate. It is essential to follow the suggested dosage guidelines and seek medical assistance in case of any concerns.


Stiripentol should be stored at room temperature, away from moisture, heat, and direct sunlight. It should be kept out of the reach of children and pets. Proper storage helps to maintain the medication's integrity and ensures its effectiveness.

For Doctors:


  • Stiripentol is indicated as an adjunctive therapy for the treatment of myoclonic epilepsy in patients who have not responded adequately to other antiepileptic drugs.

  • It should be used in combination with other medications as prescribed.


  • Stiripentol is contraindicated in patients who are hypersensitive to the drug or any of its components.

  • It should also be avoided in patients with severe hepatic impairment.

  • Before prescribing Stiripentol, consideration should be given to potential drug interactions and individual patient characteristics.

Pharmacological Class:

Stiripentol belongs to the class of antiepileptic drugs known as GABAergic agents. It enhances the inhibitory effects of GABA, a neurotransmitter involved in regulating neuronal excitability.

Route of Administration:

Stiripentol is administered orally in the form of capsules. The oral route provides convenient and effective delivery of the medication.


The dosage of Stiripentol varies depending on the patient's age, weight, and individual response. It is important to initiate treatment at a low dose and titrate gradually to achieve optimal seizure control. The dosing regimen should be tailored to each patient's needs.

Dosing Considerations:

Various factors should be considered when prescribing Stiripentol, including the patient's age, weight, renal and hepatic function, concomitant medications, and potential drug interactions. Dosing adjustments may be necessary for specific populations, such as pediatric or elderly patients.

Pharmacological Aspects of Stiripentol


Stiripentol is believed to enhance the inhibitory effects of GABA in the brain by modulating GABAergic neurotransmission. This substance functions as a positive allosteric modulator of GABA receptors. This leads to an increase in the frequency of GABA-gated chloride channels opening, which in turn enhances inhibitory neurotransmission.

Mechanism of Action:

Stiripentol's exact mechanism of action in myoclonic epilepsy is not fully understood. However, its GABAergic activity is thought to contribute to suppressing abnormal neuronal excitability and reducing myoclonic seizures.


Stiripentol is rapidly absorbed after oral administration, with peak plasma concentrations reached within one to four hours. It undergoes extensive hepatic metabolism, primarily through CYP2C19 and CYP3A4 enzymes. The metabolites are eliminated mainly through urine and feces. Dosing adjustments may be necessary for patients with hepatic impairment.


In cases of overdose, Stiripentol can cause central nervous system depression, including severe drowsiness, confusion, and respiratory depression. Supportive measures should be implemented, and the patient's vital signs should be closely monitored.

Clinical Studies:

Clinical studies have demonstrated the efficacy of Stiripentol as adjunctive therapy in reducing the frequency and severity of myoclonic seizures in patients with myoclonic epilepsy. These studies have provided evidence supporting its use in combination with other antiepileptic drugs.

Warnings and Precautions:

When prescribing Stiripentol, caution should be exercised in patients with impaired hepatic function, as dosage adjustments may be necessary. The potential for drug interactions should also be considered, as Stiripentol can affect the metabolism of certain medications.

  • Hepatic Impairment: When prescribing Stiripentol, it is important to be cautious with patients who have severe hepatic impairment since the drug is mainly metabolized in the liver. Dose adjustments might be needed, and monitoring liver function closely is important.

  • Hypersensitivity Reactions: Patients with a known hypersensitivity to Stiripentol or any of its components should not take the medication. It is possible to experience hypersensitivity reactions such as rash, itching, swelling, and difficulty breathing, which may require urgent medical attention.

  • Drug Interactions: Stiripentol can interact with other medications, including antiepileptic drugs and drugs metabolized by CYP2C19 and CYP3A4 enzymes. Close monitoring of drug concentrations and potential dose adjustments may be required when Stiripentol is co-administered with other medications. Healthcare providers should review the patient's medication list and consider potential interactions before prescribing Stiripentol.

  • Suicidal Thoughts and Behavior: Like many antiepileptic drugs, Stiripentol may increase the risk of suicidal thoughts and behavior. Patients and caregivers should be vigilant for any signs of worsening depression, mood changes, or unusual behavior. Prompt medical attention should be sought if such symptoms occur.

  • CNS Depression: Stiripentol may cause central nervous system (CNS) depression, leading to drowsiness, dizziness, and decreased alertness. It is important to inform patients to be careful when driving, operating machinery, or participating in activities that require mental alertness until they understand the impact of the medication on them. It is recommended to avoid alcohol and other CNS depressants or use them with caution as they may have additional effects.

  • Bone Marrow Suppression: Rare cases of bone marrow suppression, including agranulocytosis and aplastic anemia, have been reported with the use of Stiripentol. It is important to keep an eye on patients for any indications of infection or unexpected bruising or bleeding. In case any of these symptoms appear, immediate medical assistance should be sought.

  • Renal Impairment: Stiripentol is mainly eliminated through hepatic metabolism, and renal impairment is not expected to affect its pharmacokinetics significantly. However, caution should still be exercised when prescribing Stiripentol to patients with renal impairment, and individual dosing adjustments should be considered if necessary.

  • Pregnancy and Lactation:The use of stiripentol during pregnancy should be considered carefully, and only if the advantages will outweigh the hazards to the unborn child. Caution should be taken while providing Stiripentol to breastfeeding mothers because it is excreted in breast milk.

It is important for healthcare providers to thoroughly review the patient's medical history, concomitant medications, and individual risk factors before initiating Stiripentol therapy. Close monitoring and appropriate patient education can minimize potential risks and ensure the safe and effective use of the medication.

Drug Interactions of Stiripentol

Stiripentol may interact with other medications, including antiepileptic drugs and drugs metabolized by CYP2C19 and CYP3A4 enzymes. Close monitoring of drug concentrations and potential dose adjustments may be required when Stiripentol is co-administered with other medications.

Specific Considerations:

Special considerations should be given to specific patient populations, such as pediatric or elderly patients. Pediatric patients may require different dosage adjustments due to age-related pharmacokinetic differences, while elderly patients may require closer monitoring for potential adverse effects.

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Dr. Basuki Nath Bhagat
Dr. Basuki Nath Bhagat

Family Physician


stiripentolmyoclonic seizure
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