Seizures can be stopped in several ways: by the brain’s own built-in shutdown mechanisms, by rescue medications given during an emergency, by daily medications that prevent seizures from starting, and by surgical or dietary approaches for people whose seizures don’t respond to drugs. What works depends on whether you’re trying to stop a seizure that’s happening right now or prevent future ones from occurring.
How the Brain Stops a Seizure on Its Own
Most seizures end within one to three minutes without any outside intervention. The brain has several natural braking systems that kick in as a seizure progresses. During the intense electrical activity of a seizure, brain tissue becomes more acidic. This acidification weakens the signaling of glutamate, the brain’s main excitatory chemical, while simultaneously boosting the activity of GABA, the brain’s main calming chemical. The net effect is like slowly pulling the plug on a runaway electrical storm.
At the same time, the brain releases increasing amounts of adenosine, a molecule that powerfully suppresses neural activity. Adenosine levels climb throughout a seizure and peak right after it ends, which is why people often feel deeply exhausted or confused in the minutes following a seizure (the “postictal” period). The combined effect of acidification, adenosine release, and depletion of the brain’s immediate energy reserves works together to shut down the excessive firing and restore normal activity. Specialized acid-sensing channels on neurons also play a role: animal studies show that when these channels are disrupted, seizures last longer and become more severe.
What to Do When Someone Is Having a Seizure
If you’re with someone having a convulsive seizure, your job is to keep them safe while the brain’s natural termination process runs its course. The CDC recommends these steps:
- Stay with the person and time the seizure from the start.
- Ease them to the ground if they’re standing or appear to be falling.
- Turn them gently onto one side with their mouth pointing toward the ground to keep the airway clear.
- Clear the area around them of anything hard or sharp.
- Place something soft under their head, like a folded jacket.
- Remove eyeglasses and loosen anything tight around the neck.
Equally important is what not to do. Do not hold the person down or try to restrain their movements. Do not put anything in their mouth, as this can break teeth or injure the jaw. Do not attempt mouth-to-mouth breathing during the seizure, because breathing typically resumes on its own afterward. Do not offer food or water until the person is fully alert.
A seizure lasting five minutes or longer is classified as status epilepticus, a medical emergency. At this point, the brain’s natural shutdown systems are failing, and the risk of permanent neurological damage increases significantly, particularly after 30 minutes. Call emergency services if a seizure passes the five-minute mark, if the person doesn’t regain consciousness between repeated seizures, or if you know it’s their first seizure.
Rescue Medications That Stop Active Seizures
When a seizure doesn’t stop on its own, a class of drugs called benzodiazepines is the first-line treatment. These medications work by amplifying GABA signaling in the brain, essentially supercharging the same calming system the brain uses naturally. In a hospital or ambulance, intravenous delivery remains the gold standard because it reaches the brain in roughly 90 to 150 seconds.
But many people with epilepsy keep non-IV rescue medications at home or school for emergencies. Midazolam is available as a nasal spray (approved for people 12 and older) and as a solution applied inside the cheek. Diazepam comes as both a nasal spray (approved for ages 6 and older) and a rectal gel. These formulations are designed so that a family member, caregiver, or teacher can administer them without medical training. If your doctor has prescribed a rescue medication, make sure anyone who spends significant time with you knows where it is and how to use it.
Daily Medications for Seizure Prevention
For people diagnosed with epilepsy, the primary goal is preventing seizures from starting in the first place. Anti-seizure medications taken daily are the backbone of treatment, and they work well for most people. A longitudinal study tracking over 1,100 patients with newly diagnosed epilepsy found that 48.3% became seizure-free for five years on their first medication. Another 26.1% achieved the same result after switching to a second medication. That means roughly three out of four people with a new epilepsy diagnosis gain long-term seizure control with medication alone.
The remaining quarter, however, have what’s called drug-resistant epilepsy. For these individuals, additional medications may reduce seizure frequency but rarely eliminate seizures entirely. This is where other strategies become important.
Surgery and Implanted Devices
When medications fail, surgery can be an option, particularly if seizures originate from a single identifiable area of the brain. Two main surgical approaches exist: traditional open resection, where the seizure-producing tissue is physically removed, and laser thermal ablation, a less invasive technique that uses heat delivered through a thin probe to destroy the targeted tissue. In pediatric patients with seizures originating from the insula (a deep brain structure), about 50% achieved seizure freedom after open resection and 43% after laser ablation at the one-year mark. When including patients with significant improvement short of complete seizure freedom, those numbers rose to 75% and 71% respectively.
For people who aren’t candidates for surgery, implanted neurostimulation devices offer another path. Three main types are in use. Vagus nerve stimulation (VNS) involves a device implanted in the chest that sends regular electrical pulses to the brain through the vagus nerve in the neck. Responsive neurostimulation (RNS) places electrodes directly on or in the brain, where they detect abnormal electrical activity and deliver targeted stimulation to interrupt it before a seizure fully develops. Deep brain stimulation (DBS) targets specific relay stations deep in the brain to disrupt the networks that propagate seizures. All three approaches produce a median seizure reduction of about 50 to 63%, though individual results vary widely. These devices rarely eliminate seizures completely but can meaningfully reduce their frequency.
The Ketogenic Diet
A high-fat, very-low-carbohydrate ketogenic diet has been used to treat epilepsy since the 1920s, and it remains a viable option, particularly for children with drug-resistant seizures. The diet forces the body to burn fat instead of glucose, producing molecules called ketone bodies that the brain uses as an alternative fuel source.
This metabolic shift affects seizure activity through several pathways. When brain cells rely less on glucose, certain potassium channels become more active, making neurons less likely to fire excessively. The diet also appears to boost production of GABA (the brain’s calming neurotransmitter) while simultaneously slowing its breakdown. Changes in other brain chemicals, including serotonin and dopamine, have been observed in children on the diet. The overall result is a brain that’s harder to tip into the kind of runaway electrical activity that produces a seizure. The diet requires strict medical supervision and careful nutritional planning, since even small deviations can reduce its effectiveness.
Lifestyle Factors That Lower Seizure Threshold
For people with epilepsy, certain everyday factors can make the brain more vulnerable to seizures, effectively lowering the threshold at which one gets triggered. Sleep deprivation is one of the most well-documented. Research has found that inadequate sleep acts as a seizure precipitant in about 28% of people with generalized epilepsy and 27% of those with temporal lobe epilepsy. One study tracking patients through daily sleep diaries confirmed a direct relationship between nights of reduced sleep and the occurrence of seizures in the days that followed.
Stress, fatigue, missed meals, and heavy alcohol use are other common triggers, and they frequently overlap. Pilots who experienced their first-ever seizure, for example, often had a combination of sleep deprivation, work stress, and skipped meals in the days leading up to the event. Even underlying sleep disorders can play a role: in several case series, treating obstructive sleep apnea improved seizure control without any change in medications, simply because patients were finally getting uninterrupted sleep.
Managing these triggers won’t cure epilepsy, but for many people, consistent sleep schedules, stress management, and avoiding alcohol can meaningfully reduce breakthrough seizures that happen despite medication. These are the modifiable factors most within your control, and they complement whatever medical treatment you’re already using.