Sudden Unexpected Death in Epilepsy (SUDEP)
5 Things You Should Know about SUDEP
#1 SUDEP is not well understood.
SUDEP stands for Sudden Unexpected Death in Epilepsy. SUDEP refers to deaths in people with epilepsy that are not from injury, drowning, or other known causes.1 Most, but not all, cases of SUDEP happen during or right after a seizure.1
Researchers do not understand the exact cause of SUDEP, but these are possible reasons it happens:2-4
- Breathing changes: A seizure may cause a person to have pauses in breathing. If these pauses last too long, they can reduce the oxygen in the blood to a dangerous level. Also, if a person’s airway gets blocked during a seizure, that can lead to suffocation.
- Heart rhythm changes: Rarely, a seizure may cause a dangerous heart rhythm or heart failure.
- Other causes and mixed causes: SUDEP may happen because of a combination of breathing trouble and abnormal heart rhythm.
The major risk factors that increase the chance of SUDEP are:
- Uncontrolled or frequent seizures.1,3,4
- Generalized convulsive (what used to be called tonic-clonic or grand mal) seizures.1,3,4
Other possible risk factors are:
- Seizures that start at a young age.3,4
- Many years of living with epilepsy.3
- Missing doses of medicine.3,4
- Drinking alchohol.1
#2 SUDEP is rare, but traumatic for families.
If you have epilepsy, it’s important to take your seizure medicine as prescribed. The chance of SUDEP is higher in people who have frequent seizures.1
Researchers estimate that for every 1,000 people with epilepsy, at least one person may die from SUDEP each year.5 This means that each year in the US, there are about 3,000 deaths due to SUDEP. But, counting SUDEP cases is difficult because SUDEP is not always included on death certificates.5
SUDEP occurs more often in people ages 21 to 40 compared to other age groups.5 Because SUDEP can happen unexpectedly to people who are so young, it can be very shocking for families and loved ones.
#3 Managing seizures may help.
Research has shown that controlling seizures may lower the chance of SUDEP. If you have epilepsy, the most important way to do this is to take your seizure medicine as prescribed.1
Other steps that might help lower the chance of SUDEP1:
- Consider a seizure alert monitor if you often have seizures at night.
- Avoid seizure triggers if you know what they are. Read more about triggers from the Epilepsy Foundation.
- Do not drink too much alcohol.
- Learn how to better control seizures and other symptoms with self-management programs.
- Get enough sleep.
- Make sure your family and friends know seizure first aid.
If you are taking medicine and still having seizures, talk to your doctor about changing your medicine or other things that might help. If seizures continue, consider seeing an epilepsy specialist. Learn how to find specialty care from the Epilepsy Foundation.
#4 Support is available.
Losing a loved one to SUDEP can be especially difficult because it’s so unexpected. The Epilepsy Foundation’s SUDEP Institute provides information and support to bereaved families.
Parents of children with epilepsy can learn more about SUDEP in children, including tips on how to talk to your child’s doctor.
#5 Research continues.
CDC supports research to help us understand SUDEP better. Together with the National Institutes of Health (NIH), CDC funds the Sudden Death in the Young Case Registry. The goals of this project are to count the number of cases and to understand the causes of death in infants, children, and young adults who die suddenly and unexpectedly – including from SUDEP. Researchers will use this information to recommend how to prevent these types of death in the future.
The Epilepsy Foundation and partners also support other SUDEP research.
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