DRAVET SYNDROME AWARENESS
WHAT IS DRAVET SYNDROME?
Dravet syndrome is a rare, lifelong genetic epilepsy disorder that usually begins during the first year of life, often in infants who were developing typically beforehand. It is classified as a developmental and epileptic encephalopathy, meaning both seizures and underlying brain differences can influence learning, behavior, and overall development. Early seizures are often prolonged and may be triggered by fever, illness, or temperature changes, which can make the condition especially complex in infancy.
Most cases are linked to a mutation in the SCN1A gene, which helps regulate electrical communication between brain cells. When this gene does not function as expected, brain signaling can become unstable, increasing the risk of seizures and affecting how the brain processes information. Over time, seizure types may expand to include convulsive, myoclonic, absence, and focal seizures that impact awareness or movement.
Alongside seizures, many individuals experience developmental differences that may appear in early childhood, such as delays in speech, coordination challenges, learning differences, and attention or behavioral changes. While Dravet syndrome is lifelong, coordinated medical care, therapies, and ongoing research into targeted treatments continue to improve symptom management and quality of life for many families.
A DEEPER LOOK AT DRAVET SYNDROME
KEY CHARACTERISTICS
Dravet syndrome typically begins in early infancy, most often between 2 and 15 months of age. The first seizures frequently occur during fever or illness and may appear similar to febrile seizures at first. As the condition develops, children and adults can experience several different seizure types. These may include prolonged febrile seizures that last longer than five minutes, generalized tonic-clonic seizures involving the whole body, myoclonic seizures that cause brief shock-like muscle jerks, atypical absence seizures marked by brief lapses in awareness, and focal seizures that affect one area of the brain. Some individuals may also experience status epilepticus, a medical emergency in which seizures do not stop without intervention. Because of the underlying genetic changes that affect brain signaling, seizures associated with Dravet syndrome are often challenging to control with standard anti-seizure medications.
CAUSES
Dravet syndrome is most commonly caused by a mutation in the SCN1A gene, with more than 80 to 90 percent of cases linked to changes in this gene. SCN1A helps produce a protein that regulates sodium channels in brain cells, which are essential for normal electrical signaling. In most individuals, the mutation occurs de novo, meaning it happens spontaneously rather than being inherited from a parent. This genetic change disrupts the way electrical signals move through the brain, making neurons more likely to fire abnormally and increasing the likelihood of seizures.
SYMPTOMS BEYOND SEIZURES
Beyond seizures, Dravet syndrome can affect many areas of development and daily functioning. Children often experience developmental delays that become more noticeable after the first year of life, including slower cognitive progress, speech and language delays, and learning challenges. Movement and coordination difficulties are also common, such as problems with balance (ataxia), low muscle tone, and challenges with both fine and gross motor skills. Some individuals show behavioral characteristics like hyperactivity, impulsivity, autism spectrum–like traits, and sleep disturbances. There may also be additional medical concerns, including difficulty regulating body temperature, a higher risk of infections, feeding or gastrointestinal issues, and an increased risk of SUDEP, or Sudden Unexpected Death in Epilepsy.
TRIGGERS
Seizures associated with Dravet syndrome are often influenced by specific triggers that affect the body’s temperature or stress levels. Common triggers include fever or illness, exposure to hot temperatures or warm baths, and in some individuals, sensitivity to flashing lights. Physical overexertion, emotional stress, or excitement can also increase the likelihood of seizures. In some cases, fever that develops after vaccination may act as a trigger, though the vaccines themselves are not the direct cause.
DIAGNOSIS
Diagnosing Dravet syndrome involves a combination of clinical assessment and specialized testing. A neurologist begins with a detailed evaluation that considers the child’s seizure history, the age when seizures first appeared, and the types and frequency of seizures over time. Genetic testing is often used to look for mutations in the SCN1A gene, which can help confirm the diagnosis. Additional tools such as EEG and MRI may also be used. EEG results can appear normal in the early stages but may show epileptiform activity as the condition progresses, while MRI scans are typically normal and are primarily used to rule out other possible causes.
TREATMENT
There is currently no cure for Dravet syndrome, but treatment focuses on managing seizures and supporting overall development and quality of life. Care often includes specialized anti-seizure medications such as valproate, clobazam, stiripentol, topiramate, fenfluramine, and cannabidiol (CBD), including FDA-approved options like Epidiolex. It is important to note that certain medications can worsen seizures in individuals with Dravet syndrome, particularly sodium-channel blockers such as carbamazepine, lamotrigine, phenytoin, and oxcarbazepine, so these are generally avoided. In addition to medication, many individuals benefit from therapies including physical, occupational, and speech therapy, along with behavioral support to address developmental needs. Some treatment plans may include medical devices like vagus nerve stimulation (VNS) to help reduce seizure frequency. Lifestyle support also plays a key role, with rescue medications available for prolonged seizures, strategies to manage body temperature, and creating safe environments that help reduce the risk of injury.
PROGNOSIS
Dravet syndrome is a lifelong condition, and the long-term outlook can vary from person to person. Many individuals continue to experience seizures into adulthood and may face developmental, learning, and daily living challenges that require ongoing supportive care. While these needs can be significant, advances in diagnosis, specialized treatments, and greater awareness have helped improve management and overall quality of life for many individuals and their families in recent years.