Most seizures last between a few seconds and three minutes, depending on the type. A seizure that continues beyond five minutes is a medical emergency. Understanding the typical duration for different seizure types helps you recognize when something falls outside the normal range and requires urgent action.
Duration by Seizure Type
Not all seizures look the same, and they don’t last the same amount of time either. The type of seizure determines what you can generally expect.
Absence seizures are the shortest. These cause brief lapses in consciousness, often just a blank stare or subtle eye blinking. A single absence seizure rarely lasts more than 15 to 20 seconds. They can be so quick that bystanders miss them entirely.
Tonic-clonic seizures (formerly called grand mal seizures) are what most people picture when they think of a seizure: stiffening of the body followed by rhythmic jerking. These typically last one to three minutes. When a tonic-clonic seizure starts as a focal seizure and then spreads to both sides of the brain, it usually falls in the 30-second to three-minute range.
Focal impaired consciousness seizures (previously called complex partial seizures) involve altered awareness along with repetitive movements like lip smacking, hand rubbing, or wandering. These can last up to several minutes. Seizures originating in the frontal lobe tend to be shorter than those starting in the temporal lobe.
The Five-Minute Emergency Threshold
Five minutes is the critical cutoff. A seizure lasting longer than five minutes, or multiple seizures occurring back to back without the person regaining full consciousness in between, qualifies as status epilepticus. This is a neurological emergency that can cause lasting brain injury if not treated quickly.
The Neurocritical Care Society defines status epilepticus as five or more minutes of continuous seizure activity, or recurrent seizures without the person returning to their baseline state between episodes. If you’re timing a seizure and it passes the five-minute mark, call 911 immediately. The same applies if a second seizure begins shortly after the first one ends.
What Happens Before a Seizure
Some people experience warning signs hours before a seizure begins. This prodromal phase can include mood changes, irritability, headaches, or a general sense that something is off. Research on patients with epilepsy found that prodromal symptoms typically have an insidious onset and can last anywhere from 30 minutes to several hours.
Separately, some people experience an aura in the seconds or minutes right before a seizure. An aura is actually a small focal seizure itself. It might involve a strange taste, a rising feeling in the stomach, visual disturbances, or déjà vu. Not everyone gets auras, but for those who do, they can serve as a brief window to get to a safe position.
The Recovery Phase After a Seizure
The seizure itself is only part of the experience. What follows, called the postictal state, often lasts longer than the seizure did. On average, this recovery period lasts between 5 and 30 minutes, but it can stretch from a few minutes to a few days depending on seizure severity.
During this phase, a person may feel confused, exhausted, sore, or have trouble speaking. Memory loss is common, and some people experience headaches or migraines. Emotional symptoms like anxiety, depression, agitation, or embarrassment also occur frequently. Physical effects can include nausea, loss of bladder or bowel control, abnormal heart rate, and elevated body temperature.
After more severe seizures, the postictal state can be more intense, potentially involving delirium, hallucinations, or even temporary loss of consciousness. This doesn’t necessarily mean the seizure caused permanent damage, but it does mean the brain needs more time to recover.
When a Seizure Requires Emergency Help
The CDC recommends calling 911 if a seizure lasts longer than five minutes or if a person has another seizure soon after the first one. You should also call for help if the person doesn’t return to normal awareness between episodes, if they’re injured during the seizure, or if it’s their first seizure ever.
If you’re witnessing a seizure, try to note the time it starts. Seizures often feel much longer than they actually are to bystanders. Having a real count on the clock gives you accurate information to share with paramedics and helps you judge whether you’re approaching that five-minute threshold. Most seizures will end on their own well before that point.