Seizures can be prevented or significantly reduced through a combination of medication, lifestyle changes, dietary approaches, and in some cases, surgery or implanted devices. The right strategy depends on what’s causing your seizures, how frequent they are, and how well you respond to initial treatment. About 60% of people with epilepsy gain full seizure control with the first or second medication they try, and additional options exist for those who don’t.
Antiseizure Medications
Medication is the first and most common approach to preventing seizures. Your doctor will typically start with a single drug, chosen based on the type of seizures you’re having, your age, and other health factors. If the first medication doesn’t work well enough or causes side effects you can’t tolerate, a second one is tried. Between these first two attempts, roughly 60% of people achieve complete seizure freedom.
Adding a second medication on top of the first helps about 10% more people, but the trade-off is real: side effects more than double when you’re taking two drugs instead of one. Common side effects across these medications include drowsiness, dizziness, mood changes, and difficulty concentrating. Finding the right fit often takes patience, and dosages may need fine-tuning over months.
For the roughly 30% of people whose seizures aren’t fully controlled by medication, doctors refer to the condition as drug-resistant or refractory epilepsy. That doesn’t mean nothing else works. It means the conversation shifts to other prevention strategies.
The Ketogenic Diet
The ketogenic diet, a high-fat, very low-carbohydrate eating plan, has been used to treat epilepsy since the 1920s and remains one of the most effective non-drug options. It works by shifting the brain’s primary fuel source from glucose to compounds called ketones, which appear to stabilize electrical activity in the brain.
The evidence is strongest in children. A landmark multicenter study published in Archives of Neurology found that after six months on the diet, 55% of pediatric patients experienced at least a 50% reduction in seizure frequency. Some children become completely seizure-free. The diet is most often recommended for children with drug-resistant epilepsy, though modified versions are increasingly used in adults as well.
The ketogenic diet requires strict medical supervision. It’s not simply “eating low-carb.” Nutrient ratios must be carefully calculated, and blood and urine need regular monitoring. Side effects can include kidney stones, high cholesterol, constipation, and slowed growth in children. Most families work with a dietitian experienced in epilepsy care to manage the diet safely.
Sleep, Stress, and Daily Habits
Some of the most accessible seizure prevention happens through daily routine. Sleep deprivation is one of the most reliable seizure triggers. During normal sleep-wake cycles, the brain’s electrical and hormonal activity shifts in ways that can either protect against or promote seizures. Disrupting those cycles, whether through late nights, irregular schedules, or poor sleep quality, lowers the brain’s seizure threshold. Most adults with epilepsy benefit from getting at least 7 to 8 hours of sleep per night, though the right amount varies from person to person. Consistency matters as much as duration: going to bed and waking up at roughly the same time each day helps stabilize brain activity.
Stress is another well-known trigger, though harder to quantify. Chronic stress raises levels of hormones that can increase brain excitability. Techniques like regular exercise, mindfulness practices, and structured daily routines won’t replace medication, but they can meaningfully reduce seizure frequency for some people. Alcohol is a separate risk: heavy drinking followed by sudden cessation can trigger withdrawal seizures, typically 24 to 48 hours after the last drink. Even moderate alcohol use can interact with seizure medications and lower the seizure threshold.
CBD for Drug-Resistant Epilepsy
Cannabidiol (CBD) entered the epilepsy treatment landscape in 2018 when the FDA approved a purified, prescription-grade form for specific severe epilepsy syndromes. This is not the CBD sold in supplement stores. The prescription version has been studied in rigorous clinical trials and is used for conditions like Dravet syndrome and Lennox-Gastaut syndrome, both of which cause frequent, hard-to-treat seizures.
In real-world long-term studies, patients experienced a 48% to 71% median reduction in drop seizures (sudden falls caused by a brief loss of muscle tone). These results are notable because they occurred in people whose seizures had already resisted multiple other treatments. Side effects can include drowsiness, decreased appetite, diarrhea, and liver enzyme changes that require blood monitoring.
Implanted Devices
When medications and diet aren’t enough, implanted neurostimulation devices offer another layer of prevention. Two main types are currently available.
Vagus nerve stimulation (VNS) involves a small device implanted under the skin of the chest, connected to the vagus nerve in the neck. It sends regular electrical pulses to the brain to help prevent seizures. Patients typically see a 35% reduction in seizure frequency after one year and about 44% after two to three years. The effect tends to improve over time, which is unusual for epilepsy treatments. Side effects are generally mild: hoarseness, coughing, or a tingling sensation during stimulation.
Responsive neurostimulation (RNS) takes a more targeted approach. A device implanted in the skull continuously monitors brain activity and delivers brief electrical pulses only when it detects the start of a seizure. Long-term data show a median 75% reduction in seizure frequency at nine years, making it one of the most effective options for people with focal epilepsy that hasn’t responded to other treatments. Because it requires brain surgery to implant, it’s reserved for cases where the benefits clearly outweigh the risks.
Epilepsy Surgery
For people whose seizures consistently originate from a single identifiable area of the brain, surgical removal of that area can be the most effective prevention of all. This is most commonly performed on the temporal lobe, but outcomes are comparable for other brain regions when the seizure focus is well-defined.
Among patients who are seizure-free immediately after surgery, 83% remain seizure-free at three years, 72% at five years, and 56% at ten years. Those numbers reflect some gradual decline over time, but for many people, surgery provides years or even decades of seizure freedom that medication alone couldn’t achieve. Some patients are able to reduce or stop their medications entirely after successful surgery, though this decision is made cautiously over time.
Not everyone is a candidate. Extensive testing, including prolonged brain monitoring, imaging, and sometimes temporary electrode placement, is needed to confirm exactly where seizures start and whether that area can be safely removed without affecting critical functions like language or movement.
Hormonal Seizure Patterns
Some women notice their seizures cluster around their menstrual period, a pattern called catamenial epilepsy. This happens because shifting levels of estrogen and progesterone throughout the cycle affect brain excitability. Estrogen tends to promote seizures, while progesterone has a protective effect. When progesterone drops sharply just before menstruation, the seizure threshold can drop with it.
Progesterone supplementation has been studied as a potential treatment, but a large clinical trial of 294 women found no overall benefit compared to placebo. However, a subset of women with the most pronounced perimenstrual seizure spikes did respond. Among those with the highest levels of perimenstrual exacerbation (about 21% of the study group), 37.8% responded to progesterone compared to just 11.1% on placebo. This suggests hormonal treatment may help a specific subset of women, but it’s not broadly effective. Tracking seizure patterns alongside your menstrual cycle can help determine whether this approach is worth discussing with your neurologist.
Managing Photosensitive Triggers
About 3% of people with epilepsy have photosensitive seizures triggered by flashing lights, rapid visual patterns, or certain screen displays. Prevention for this group focuses on reducing exposure to triggering stimuli. Blue-tinted lenses (specifically a shade called Z1) have been shown to reduce the brain’s abnormal response to flashing lights by 66% in children with photosensitivity. These lenses work by filtering out red wavelengths of light, which are the most provocative for photosensitive brains. They don’t eliminate the response entirely, but they significantly dampen it.
Practical steps include watching screens in well-lit rooms to reduce contrast, sitting farther from the screen, using displays with higher refresh rates, and avoiding known triggers like strobe lights. Many video games and broadcast programs now carry photosensitivity warnings, and browser extensions can block flashing content on websites.