Written and medically reviewed by Dorcas Morak, Pharm.D
Seizure disorders, commonly known as epilepsy, affect over 3 million people in the United States and about 50 million worldwide. Epilepsy is typically diagnosed when a person experiences two or more unprovoked seizures occurring at least 24 hours apart.
Seizures occur when abnormal electrical signals disrupt normal brain activity. They may be focal seizures, starting in one area of the brain, or generalized seizures, affecting both sides of the brain. Common seizure types include tonic-clonic, absence, myoclonic, and focal impaired awareness seizures. Modern treatment focuses on antiepileptic drugs (AEDs) that stabilize electrical activity and prevent seizure recurrence.
How Do Antiepileptic Drugs Work?
Antiepileptic drugs reduce abnormal brain activity using several mechanisms:
- Blocking sodium channels to stabilize neurons
- Enhancing GABA, the brain’s main inhibitory neurotransmitter
- Reducing glutamate, an excitatory neurotransmitter
- Modulating calcium channels or synaptic transmission
Examples include:
- Lamotrigine (Lamictal) – sodium channel blocker
- Levetiracetam (Keppra) – synaptic vesicle protein modulator
- Topiramate (Topamax) – multi-mechanism activity
- Perampanel (Fycompa) – AMPA receptor antagonist
Most patients begin treatment with a single medication (monotherapy) to minimize side effects.
Best Broad-Spectrum Epilepsy Medications
Broad-spectrum AEDs treat multiple seizure types, including both focal and generalized seizures. Common options include:
- Valproate (Depakote)
- Lamotrigine (Lamictal)
- Levetiracetam (Keppra)
- Topiramate (Topamax)
- Zonisamide (Zonegran)
These medications are often used when seizure classification is uncertain or when patients experience several seizure types.
Best Medications for Focal Seizures
Focal seizures originate in a specific brain region and are the most common seizure type in adults. Frequently prescribed medications include:
- Carbamazepine (Tegretol)
- Oxcarbazepine (Trileptal)
- Lacosamide (Vimpat)
- Cenobamate (Xcopri)
- Brivaracetam (Briviact)
Cenobamate has gained attention for its strong seizure-reduction rates in drug-resistant focal epilepsy.
Best Treatment for Absence Seizures
Absence seizures are brief episodes of impaired awareness most commonly seen in children. First-line treatments include:
- Ethosuximide (Zarontin) – considered the gold standard
- Valproate (Depakote)
- Lamotrigine (Lamictal)
Ethosuximide is preferred when absence seizures occur alone without other seizure types.
Epilepsy Medications for Children
Pediatric epilepsy treatment prioritizes safety, tolerability, and FDA approval for specific syndromes. Common medications include:
- Levetiracetam (Keppra)
- Valproate (Depakote)
- Topiramate (Topamax)
Specialized therapies are available for rare pediatric epilepsies:
- Cannabidiol (Epidiolex) – Dravet syndrome, Lennox-Gastaut syndrome
- Stiripentol (Diacomit) – Dravet syndrome
- Fenfluramine (Fintepla) – Dravet syndrome and Lennox-Gastaut syndrome
New Epilepsy Treatments and Medications in 2026
Newer therapies continue to expand treatment options. Examples include:
- Cenobamate (Xcopri) – highly effective for focal seizures
- Brivaracetam (Briviact) – newer SV2A modulator
- Perampanel (Fycompa) – AMPA receptor antagonist
- Everolimus (Votubia/Afinitor) – used for seizures associated with tuberous sclerosis complex
These newer drugs aim to improve seizure control while reducing cognitive and systemic side effects.
Common Side Effects of Antiepileptic Drugs
Side effects vary depending on the medication. Examples include:
- Lamotrigine – rash risk if titrated too quickly
- Valproate – weight gain, tremor, liver toxicity
- Carbamazepine – dizziness, low sodium levels
- Levetiracetam – mood changes or irritability
- Topiramate – cognitive slowing and tingling sensations
Careful dosing adjustments help reduce these effects.
How Doctors Manage AED Side Effects
Doctors often reduce side effects by:
- Starting with low doses and gradual titration
- Using monotherapy when possible
- Monitoring blood levels for medications like valproate, carbamazepine, phenytoin, and phenobarbital
- Performing periodic lab tests or EEG monitoring
Are Epilepsy Medications Safe During Pregnancy?
Some seizure medications pose risks during pregnancy.
Valproate is generally avoided due to a higher risk of birth defects. Safer alternatives often include:
- Lamotrigine (Lamictal)
- Levetiracetam (Keppra)
Pregnant patients with epilepsy are often advised to take folic acid supplementation and work closely with a neurologist.
Do Seizure Medications Interact with Other Drugs?
Some AEDs interact with other medications. For example:
- Carbamazepine and phenytoin induce liver enzymes that lower levels of many drugs.
- Valproate can increase concentrations of certain medications.
- Levetiracetam and lacosamide generally have fewer interactions.
Patients should always review medications with their healthcare provider.
Rescue Medications for Emergency Seizures
Certain medications are used to stop prolonged seizures or seizure clusters. Examples include:
- Diazepam rectal gel (Diastat)
- Midazolam nasal spray (Nayzilam)
- Diazepam nasal spray (Valtoco)
These medications are often prescribed for patients at risk of status epilepticus or seizure emergencies.
When Non-Medication Epilepsy Treatments Are Used
If seizures remain uncontrolled after trying multiple medications, other treatments may be considered. Options include:
- Epilepsy surgery
- Vagus nerve stimulation (VNS)
- Responsive neurostimulation (RNS)
- Ketogenic or modified Atkins diets
Approximately 30% of people with epilepsy experience drug-resistant seizures.
What Does the Future Hold for Epilepsy Care?
Emerging therapies focus on precision medicine, tailoring treatments based on genetics, seizure patterns, and brain imaging. Researchers are exploring:
- Gene-targeted therapies
- Advanced neurostimulation devices
- Improved seizure prediction technologies
These innovations may improve seizure control while minimizing side effects.
How to Save on Epilepsy Medications with the RxLess® Assurance Plan
Long-term seizure treatment can be expensive, especially when patients require multiple medications.
The RxLess® Assurance Plan helps patients compare prescription prices and access free digital coupons accepted at more than 70,000 pharmacies across the United States.
By comparing real-time pricing for medications like lamotrigine, levetiracetam, carbamazepine, and topiramate, patients may be able to significantly reduce prescription costs and maintain consistent treatment.
