Epilepsy: Types, Diagnosis, and Treatment Options

Epilepsy is not one seizure type but many, and getting the type right shapes everything that follows: which medication is likely to help, what the diagnostic workup looks like, and even whether what happened was actually a seizure at all. This guide covers the major types, what causes epilepsy, how it is diagnosed, what treatment involves, and the practical realities of driving, disability status, and the small but real risk of dying from it.

Focal vs. Generalized: The Basic Split

Every seizure is classified first by where it starts. Focal seizures, also called partial seizures, begin in one area of the brain and may or may not affect awareness. Generalized seizures involve both sides of the brain from the start, and include the tonic-clonic seizures most people picture when they hear the word. Some people have both types. Our conditions page covers epilepsy alongside dementia and ADHD as part of the broader neurological picture; this article goes deeper on epilepsy specifically.

Temporal lobe epilepsy is the most common form of focal epilepsy in adults, accounting for roughly 30 percent of epilepsy overall. It often produces a distinctive aura beforehand: an unusual smell or taste, a rising sensation in the stomach, or a sudden wave of déjà vu that can serve as a brief warning before the seizure itself.

Read More: Neurological / Cognitive / Seizure Disorders: Symptoms, Causes, Diagnosis, and Treatment

What Causes It

Genetics plays a real role, but "genetic" and "hereditary" aren't the same here. A specific gene mutation drives many epilepsies, but a large share of those are new mutations rather than ones inherited from a parent, so having epilepsy does not necessarily mean it runs in the family or will be passed to children. Structural causes, brain injury, stroke, infection, or tumors, account for much of the rest, and in roughly 40 percent of cases, no cause is ever identified.

Photosensitive epilepsy, seizures triggered specifically by flashing or strobing light, is real but affects only a small minority, roughly 3 to 5 percent of people with epilepsy, mostly children and adolescents. For someone without epilepsy, flashing lights do not cause seizures; the susceptibility itself has to already be present.

Is It Actually a Seizure? PNES Explained

Psychogenic non-epileptic seizures, also called PNES or functional seizures, look like a seizure from the outside but have a fundamentally different cause: psychological rather than electrical. Video-EEG monitoring is the gold-standard test that distinguishes the two, since it captures both the episode and the brain’s electrical activity at the same time; a genuine seizure shows abnormal activity, while PNES does not.

This distinction matters enormously because the treatments do not overlap. Anti-seizure medications, the backbone of epilepsy care, do nothing for PNES, which is treated instead with psychological therapies, particularly cognitive behavioral therapy. Misdiagnosis is common, and the average delay before an accurate PNES diagnosis runs seven years or longer, often because access to video-EEG monitoring is limited. PNES and epilepsy can also coexist in the same person, which complicates the picture further.

Treatment: Medications and Surgery

Anti-seizure medications are first-line for nearly everyone, and the choice depends on seizure type, age, and other health conditions.

• Levetiracetam (Keppra)
• Lamotrigine (Lamictal)
• Divalproex (Depakote)
• Topiramate (Topamax)

Each works through a different mechanism on overactive electrical signaling in the brain. Several carry important safety considerations: divalproex carries a boxed warning for birth defects, liver toxicity, and pancreatitis and is generally avoided in anyone who could become pregnant, topiramate also raises birth-defect risk, lamotrigine carries a boxed warning for serious rash, and levetiracetam can cause irritability or mood changes. Anyone who could become pregnant should review their anti-seizure medication with a neurologist before conceiving, since several also interact with hormonal birth control.

Lamotrigine dosing illustrates why the number on a prescription matters more than intuition suggests. As monotherapy, the typical maintenance range runs roughly 100 to 400 mg per day, occasionally up to 500 mg, so 300 mg sits comfortably within the normal range rather than near a ceiling.

Dosing is also sensitive to other medications: combining lamotrigine with valproate sharply slows its clearance, so a lower dose is used, while enzyme-inducing anti-seizure drugs can allow doses up to 700 mg. Titration is always gradual regardless of target dose, since raising it too quickly raises the risk of a serious rash.

When medication does not control seizures, in roughly a third of cases, surgery becomes a genuine option for some. Epilepsy surgery removes or disconnects the specific brain area generating the seizures, and for well-selected candidates with focal epilepsy, it can significantly reduce or eliminate seizures rather than only manage them.

Living With Epilepsy

Epilepsy counts as a disability under the ADA regardless of how well medication controls it, which matters for workplace accommodations even when seizures are rare. Qualifying for Social Security disability benefits specifically is a separate, higher bar, generally requiring seizures at a defined minimum frequency despite consistent treatment.

Every state allows people with epilepsy to drive, but nearly all require a seizure-free period first, typically 3 to 12 months depending on the state, verified by a physician’s evaluation. The requirement resets after a breakthrough seizure, which is worth planning around rather than being caught off guard by.

Can you die from epilepsy? Rarely, but yes, primarily through sudden unexpected death in epilepsy, or SUDEP, which affects roughly 1 in 1,000 people with epilepsy each year. The risk concentrates heavily in people with frequent, poorly controlled tonic-clonic seizures; the risk is much lower, though not zero, for people whose seizures are well controlled.

Taking medication consistently is the single most protective factor within a person’s control. The Epilepsy Foundation provides detailed, current information and support on this topic.

Where to Start

If a seizure-like episode has just happened, note exactly what it looked like, including any warning sensation beforehand and how long recovery took, since these details often point toward focal versus generalized before any test is run. Ask directly whether video-EEG monitoring is available if the diagnosis feels uncertain, particularly if seizures have not responded to typical anti-seizure medication.

If you already have a diagnosis, keep a seizure log noting date, time, and any trigger, since that record shapes both medication decisions and eligibility for driving. Never stop an anti-seizure medication abruptly on your own, since doing so raises seizure risk sharply, including the risk of status epilepticus, a prolonged seizure that needs emergency care. As a rule of thumb, call 911 if a seizure lasts longer than 5 minutes, if another seizure follows before the person recovers, if it is a first-ever seizure, or if it happens in water or causes injury.

Read More: Neurological / Cognitive / Seizure Disorders: Symptoms, Causes, Diagnosis, and Treatment