What is drug-resistant epilepsy?

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What is drug-resistant epilepsy?

Graphic of a group of people, some of whom are indicated to have been diagnosed with epilepsy

Drug-resistant epilepsy, also known as intractable epilepsy or refractory epilepsy, is defined as the failure of at least two anti-seizure drugs.

Approximately 1 in 26 people in the U.S. will be diagnosed with epilepsy in their lifetime. Out of the people living with epilepsy, more than 1 million Americans still experience seizures despite taking anti-seizure medication.

If you or a loved one have tried two medications, there is less than a 5% chance that a third medication will control your seizures.

Chen, Z. et. al. JAMA Neurology, 2018

Focal Epilepsy vs. Generalized Epilepsy

Seizures are generally described as either focal seizures (partial onset) or generalized seizures based on where and how they begin.

  • Focal seizures begin with an electrical discharge in one or two parts of the brain referred to as the seizure focus. While it starts in one area, it can spread to or involve other areas as well (“secondary generalized”).
  • Generalized seizures begin with widespread electrical discharge that involves the entire brain at once.
Focal seizures vs. generalized seizures
Generalized seizures
Focal seizures vs. generalized seizures
Generalized seizures

Focal Epilepsy vs. Generalized Epilepsy

Seizures are generally described as either focal seizures (partial onset) or generalized seizures based on where and how they begin.

  • Focal seizures begin with an electrical discharge in one or two parts of the brain referred to as the seizure focus. While it starts in one area, it can spread to or involve other areas as well (“secondary generalized”).
  • Generalized seizures begin with widespread electrical discharge that involves the entire brain at once.
man and woman studying on laptop

Why find the right drug-resistant epilepsy treatment for you?

Living with uncontrolled seizures, or drug-resistant epilepsy, can have several risks including:

  • Epilepsy-related injury
  • Increased emotional and behavioral problems
  • Memory problems
  • Poorer occupational outcomes
  • Increased risk of side effects to multiple anti-seizure medications
  • Increased risk of Sudden Unexpected Death in Epilepsy (SUDEP)1

What is SUDEP?

SUDEP is defined as a sudden unexpected death of an individual with epilepsy who was otherwise healthy.1

Each year 1 in 150 people with uncontrolled seizures die from SUDEP.

Tomson, et al., Lancet Neurology, 2008

Drug-Resistant Focal Epilepsy Treatment Options

Epilepsy Surgery Neuromodulation Devices
Resective Surgery Laser Ablation2 VNS Therapy3 & DBS Therapy2 The RNS® System
Targets the source of your seizures  
Preserves brain tissue    
Adjustable therapy    
Recognizes and responds to brain activity      
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Neuromodulation Devices
The RNS® System
Targets the source of your seizures
Preserves brain tissue
Adjustable therapy
Recognizes and responds to brain activity
Neuromodulation Devices
VNS Therapy3 & DBS Therapy2
Targets the source of your seizures  
Preserves brain tissue
Adjustable therapy
Recognizes and responds to brain activity  
Epilepsy Surgery
Laser Ablation2
Targets the source of your seizures
Preserves brain tissue  
Adjustable therapy  
Recognizes and responds to brain activity  
Epilepsy Surgery
Resective Surgery
Targets the source of your seizures
Preserves brain tissue  
Adjustable therapy  
Recognizes and responds to brain activity  

1. Epilepsy Foundation Website, 2021. 2. Medtronic Website, 2021. 3. LivaNova Website, 2021.

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14%
    The RNS System is for individuals 18 and older who have focal epilepsy and have tried two or more medications without finding seizure control.
  • Based on your answers, your patient might benefit from the RNS System.

    Get your profile and a list of questions to ask your doctor.

  • Unfortunately it appears your patient is not an appropriate candidate for the RNS® System at this time.

  • The RNS® System is intended for patients who have undergone diagnostic testing that localized no more than 2 epileptogenic foci.

    If your patient has not undergone diagnostic testing, search here to find a comprehensive epilepsy center that can evaluate your patient, including determining if the RNS System is right for them.

  • If you are interested in learning more about the RNS® System, you can have an RNS® System professional contact you by filling out the form below:

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