Understanding SUDEP

SUDEP stands for Sudden Unexpected Death in Epilepsy. It describes the rare situation when a person with epilepsy, who was otherwise in their usual health, dies suddenly and no other cause of death can be found — the death was not from an accident, an illness, or a seizure emergency. It most often happens during or right after a seizure, and many times at night, when no one sees it happen.

This is a hard topic, and it is normal to feel uneasy reading about it. But there is a reason doctors and epilepsy organizations talk about SUDEP openly: some of the risk can be reduced, and people can only act on a risk they know about. The Epilepsy Foundation notes that in a 2016 survey, almost half of respondents said learning more about SUDEP could change how they approach seizure control. Knowing is not meant to frighten you — it is meant to give you and your care team something to work with.

It helps to keep the numbers in perspective. The Epilepsy Foundation reports that about 1 out of 1,000 people with epilepsy die from SUDEP each year — meaning it does not happen to the vast majority of people with epilepsy. The risk is higher, though, for people whose seizures are not well controlled, especially uncontrolled generalized tonic-clonic seizures (convulsions) and seizures that happen during sleep. For people with poorly controlled seizures, the Foundation notes the risk can rise to about 1 out of 150 each year. That gap is exactly why seizure control matters so much.

The most important step in lowering risk is working with your care team to have as few seizures as possible. Practical pieces of that include taking anti-seizure medication exactly as prescribed and on time, getting enough sleep, limiting alcohol, knowing and avoiding your personal seizure triggers, and making sure the people around you know seizure first aid. If seizures continue despite treatment, these materials encourage asking your doctor about a referral to an epilepsy specialist (an epileptologist) at an accredited epilepsy center, where options like surgery, neurostimulation devices, or dietary therapy can be explored. For nighttime seizures, questions worth raising with your care team include whether a seizure alert device or sharing a bedroom makes sense for you.

The resources below come from the Epilepsy Foundation and its SUDEP Institute. They explain SUDEP in plain terms, list the risk factors, and — maybe most usefully — give you ready-made questions to bring to your next appointment. The Epilepsy Foundation's helpline is available at 1-800-332-1000, with a Spanish-language line at 1-866-748-8008, including bereavement support for families who have lost someone to SUDEP.