Epilepsy is treated primarily with medication, and most people gain good seizure control with one or two drugs. About 56% of people achieve seizure freedom with their first medication. For those who don’t respond to the first drug, roughly 75% still reach a full year without seizures within six years by switching or combining medications. When at least two well-chosen medications fail to control seizures, the condition is classified as drug-resistant epilepsy, and that’s when surgery, devices, and dietary therapies enter the picture.
Medications: The First Line of Treatment
Anti-seizure medications work by calming abnormal electrical activity in the brain. Some do this by blocking the channels that let charged particles (sodium, potassium, calcium) rush into nerve cells, which prevents the rapid-fire signaling that causes a seizure. Others boost the brain’s natural braking system, a chemical messenger called GABA that slows neural activity down. There are more than 20 approved anti-seizure drugs, and the right choice depends on the type of seizures you have, your age, other medications you take, and whether you’re pregnant or planning to be.
If the first medication doesn’t work or causes intolerable side effects, your doctor will typically try a second one. About half of people who fail a first drug also fail the second. After two adequate trials without success, the International League Against Epilepsy considers the epilepsy drug-resistant. At that point, roughly one in three people with epilepsy falls into this category, and the conversation shifts toward non-drug treatments.
Newer Medications for Focal Seizures
One of the more effective newer options is cenobamate, approved by the FDA for focal seizures in adults. In clinical trials, the 200 mg dose reduced seizure frequency by about 55% compared to roughly 24% for placebo. More striking were the seizure-free rates: 21% of patients on the highest dose had zero seizures during the maintenance phase, compared to just 1% on placebo. Those numbers are unusually strong for an add-on medication in people whose seizures were already difficult to control.
The trade-off is side effects. Drowsiness, dizziness, and fatigue are the most common, and they increase with higher doses. At the 400 mg dose, 37% of participants reported sleepiness and 33% reported dizziness. A serious allergic reaction called DRESS occurred in the early development program, so the drug must be started at a low dose and increased slowly over weeks.
CBD for Specific Epilepsy Syndromes
A prescription cannabidiol (CBD) oral solution is FDA-approved for seizures caused by three specific conditions: Lennox-Gastaut syndrome, Dravet syndrome, and tuberous sclerosis complex. These are severe, often childhood-onset epilepsies that tend to resist standard medications. This is not the same as over-the-counter CBD products, which are unregulated and not proven to treat seizures. The prescription form is available for patients one year of age and older.
Surgery for Drug-Resistant Epilepsy
When medications can’t control seizures and a clear source of seizure activity can be identified in the brain, surgery becomes an option. The most common procedure is resective surgery, where the surgeon removes the small area of brain tissue where seizures originate. This is most often performed on one of the temporal lobes and can result in complete seizure freedom for a significant number of patients.
A less invasive alternative is laser thermal ablation. Instead of opening the skull, a surgeon guides a thin laser fiber into the brain using real-time MRI and destroys the targeted tissue with heat. Recovery is faster and the procedure leaves a much smaller wound, though it works best for small, well-defined seizure sources.
For children whose seizures originate from widespread damage across one entire side of the brain, typically from a condition present at birth, a procedure called hemispherectomy removes or disconnects the outer layer of that hemisphere. Despite how dramatic this sounds, the developing brain can adapt remarkably well, and this surgery has some of the highest seizure-freedom rates of any epilepsy procedure in the right candidates.
Implanted Devices: Neuromodulation
If surgery isn’t possible because the seizure source can’t be pinpointed or sits in a critical area, implanted electrical devices offer another path. These don’t cure epilepsy, but they can meaningfully reduce seizure frequency over time.
Vagus nerve stimulation (VNS) is the most established option. A small generator implanted under the skin of the chest sends regular electrical pulses to the vagus nerve in the neck, which relays signals to the brain. In the first year, patients see an average seizure reduction of about 48%. That number improves with time: by five years, the average reduction reaches roughly 64%, and about two-thirds of patients have their seizures cut in half or more.
Deep brain stimulation (DBS) places electrodes directly into a structure deep in the brain called the anterior nucleus of the thalamus. It showed stronger first-year results in a head-to-head comparison, with an average seizure reduction of 65% at 12 months. A larger trial reported a 69% average reduction and a 68% response rate over longer follow-up. DBS is generally reserved for adults whose seizures haven’t responded to other treatments.
A third option, responsive neurostimulation, takes a different approach. Electrodes placed at the seizure source continuously monitor brain activity and deliver a brief pulse of stimulation only when they detect the start of abnormal activity, essentially interrupting a seizure before it fully develops.
The Ketogenic Diet and Its Variations
A high-fat, very low-carbohydrate diet can reduce seizures, particularly in children with drug-resistant epilepsy. The classic ketogenic diet uses a strict 4:1 ratio of fat to combined protein and carbohydrates, which forces the body to burn fat for fuel and produce molecules called ketones. While the exact mechanism isn’t fully understood, the metabolic shift appears to stabilize brain activity.
The results in children are substantial. A Cochrane review found that up to 55% of children on the classic ketogenic diet were completely seizure-free after three months, and up to 85% experienced a meaningful reduction in seizure frequency. A less restrictive version called the modified Atkins diet, which allows more protein and doesn’t require weighing food, produced seizure freedom in up to 25% of children and seizure reduction in up to 60%.
Results in adults are less impressive. No adults in the reviewed studies achieved full seizure freedom, and while about 42% initially saw fewer seizures on the modified Atkins diet, only 10% maintained that improvement at three months. The diet is difficult to sustain long-term, and adults generally find the food restrictions harder to integrate into daily life. Still, for some people, it provides enough benefit to be worth the effort, especially as an add-on to medication.
Rescue Medications for Seizure Emergencies
Some people experience seizure clusters, where multiple seizures happen in a short period. Rescue medications are fast-acting drugs kept on hand for these situations. A nasal spray form of midazolam is approved for seizure clusters in people 12 and older. It delivers a single 5 mg dose sprayed into one nostril. A second dose can be given 10 minutes later if needed, but no more than two doses should be used per episode, and no more than five episodes treated per month. Having a rescue plan in place, and making sure family members or close contacts know how to use the medication, is an important part of managing epilepsy safely.
Lifestyle Habits That Affect Seizure Control
Medication and procedures do the heavy lifting, but daily habits play a real supporting role in keeping seizures under control. Sleep deprivation is one of the most common and well-established seizure triggers. Aim for at least seven to eight hours per night, and try to keep a consistent sleep schedule, since irregular sleep patterns can lower your seizure threshold even if you’re getting enough total hours.
Alcohol is another frequent trigger. If you drink, the CDC recommends no more than two drinks per day for men and one for women. Stress, missed meals, and illness can also increase seizure risk. Regular exercise, a balanced diet, and stress management techniques all contribute to a more stable baseline. None of these replace medication, but skipping them can undermine even the best drug regimen. Tracking your seizures alongside daily habits in a journal or app can help you identify your personal triggers and give your doctor useful data at appointments.