Some people can interrupt a seizure before it fully develops, but only under specific circumstances. If you experience a warning sensation (called an aura) before your seizures, you may have a brief window to use relaxation techniques, focused mental tasks, or a rescue device to reduce the seizure’s intensity or stop it from spreading. Once a seizure has fully taken hold and consciousness is lost, though, there is no way to willfully fight through it. Your brain’s electrical activity at that point is beyond conscious control.
The answer depends heavily on what type of seizure you have, whether you get a warning beforehand, and what tools you have available.
What Happens in Your Brain During a Seizure
Your brain has a built-in braking system that tries to stop seizures on its own. When a cluster of neurons starts firing abnormally, nearby inhibitory brain cells release a chemical called GABA, which acts like a brake signal. GABA opens tiny channels on neighboring neurons that make them harder to activate, essentially creating a wall of calm tissue around the electrical storm. This is why many seizures stay localized or stop on their own within a couple of minutes.
Your brain also has a second, slower layer of defense. Certain receptors outside the normal signaling junctions don’t wear out the way the fast-acting ones do. They provide a sustained, low-level braking force that can dampen the overall excitability of large regions of brain tissue. Hormones derived from progesterone enhance this sustained braking effect, which partly explains why seizure patterns can shift with hormonal cycles.
When these natural defenses are overwhelmed, the abnormal electrical activity spreads. That spread is what turns a focal seizure (limited to one area) into a generalized one that affects the whole brain and causes loss of consciousness or convulsions.
The Aura: Your Window to Act
An aura is the earliest conscious phase of a focal seizure. It might feel like a rising sensation in your stomach, a strange taste or smell, déjà vu, sudden fear, or visual disturbances. It occurs immediately before the seizure develops further, and it represents the narrow window where intervention is possible. Some definitions place the distinction between an aura and a longer-term “prodromal” warning at about 30 minutes: anything that far in advance is a prodrome, while the aura is the seizure already beginning in a small area of the brain.
Not everyone gets auras. They’re most common with focal seizures that start in one part of the brain. If your seizures begin as generalized events (affecting the whole brain at once), you typically have no warning and no window to act. Knowing whether you experience auras, and what they feel like, is the first step in figuring out whether any intervention is realistic for you.
Behavioral Techniques That Can Help
For people with focal seizures and a clear aura, certain psychological and physical techniques have shown real effectiveness at reducing or aborting seizures. These are sometimes called “countermeasures,” and they work by rapidly shifting your brain’s arousal level at the moment the seizure is trying to build.
The most studied approaches fall into two categories:
- Cue-controlled relaxation: You learn a specific relaxation technique during calm periods, then train yourself to deploy it the instant you recognize your aura or find yourself in a situation you associate with seizures. The goal is to lower your overall neural excitability quickly enough to prevent the seizure from spreading.
- Arousal-based countermeasures: Some people do the opposite. Intense mental focus, rapid counting, sniffing a strong scent, or clenching a fist on the opposite side of the body from the seizure focus can sometimes disrupt the electrical pattern. These tasks force other brain networks to activate, competing with the abnormal discharge.
These techniques work best when the seizure type is consistent, the aura is reliable, and the person has practiced the response enough that it becomes automatic. They are not a replacement for medication, and they don’t work for everyone. But for people with refractory focal epilepsy who have tried multiple drugs without full seizure control, behavioral methods offer a genuine additional tool.
Breathing and CO2
Carbon dioxide has been recognized as having anticonvulsant properties since 1928, when a gas mixture containing 10% CO2 was used to treat certain types of epilepsy. The mechanism is straightforward: increased CO2 in the brain shifts cellular pH (making it slightly more acidic), which reduces the excitability of neurons.
A controlled breathing method that briefly increases CO2 concentration in the airways has been proposed as a way to terminate seizures rapidly. The idea is that a sudden, concentrated rise in CO2 absorbed through the nasal passages reaches the brain quickly, influencing both local brain regions and deeper brainstem areas involved in seizure activity. This approach is still being studied and is not yet a standard recommendation, but the underlying biology is well established.
Devices That Interrupt Seizures
Vagus nerve stimulation (VNS) is an implanted device that sends electrical pulses to the brain through a nerve in the neck. Newer models can detect a sudden spike in heart rate, which sometimes signals an oncoming seizure, and automatically deliver a pulse. You can also swipe a handheld magnet over the implant the moment you feel an aura to trigger an extra burst of stimulation.
VNS is not a cure. Most people continue taking seizure medication after implantation. But some people experience up to 50% fewer seizures, and the ones that do occur tend to be less severe. The magnet feature gives people with auras an active tool they can use in real time.
Rescue Medications
If a seizure can’t be stopped behaviorally, prescription rescue medications can terminate it quickly. Nasal spray formulations work fast because the medication is absorbed directly through the nasal lining into the bloodstream, bypassing the digestive system entirely. In clinical studies, nasal rescue medications stopped seizures in an average of about 3 to 3.5 minutes, which is comparable to or faster than intravenous options (which require finding a vein first).
These medications are typically prescribed for people who have prolonged or clustered seizures. A caregiver, family member, or the person themselves (if they catch the aura early enough) administers the spray. Having a rescue medication on hand doesn’t mean you can “fight off” every seizure, but it dramatically shortens the ones that break through.
What You Cannot Do During a Seizure
Once a seizure has generalized and consciousness is lost, no amount of willpower can stop it. The electrical activity has spread beyond the brain’s ability to contain it, and the person is no longer capable of deliberate action. At this point, the seizure will run its course until the brain’s inhibitory systems regain control or medication intervenes.
Physical restraint during a convulsive seizure is harmful. Holding someone down can cause bone fractures or soft tissue injuries. Placing objects in the mouth risks breaking teeth or causing choking. The most helpful response is to guide the person onto their side, clear the area of hard objects, keep their airway open, and time the seizure. If it lasts longer than five minutes, that’s a medical emergency.
Putting It Together
Whether you can intervene depends on three factors: seizure type, warning time, and preparation. Focal seizures with a consistent aura give you the best chance. Generalized seizures with no warning give you essentially none. The techniques that work, such as trained relaxation, focused mental tasks, VNS magnet use, and rescue nasal sprays, all require advance planning. You need to know your seizure pattern, practice your response, and have your tools accessible.
None of these approaches guarantee you’ll stop every seizure. But for many people with epilepsy, the combination of medication, behavioral techniques, and rescue tools means that some seizures can be shortened, softened, or occasionally prevented from fully developing. That partial control, even when it’s not perfect, can meaningfully change daily life.