About CDKL5 Deficiency Disorder
CDKL5 deficiency disorder is a rare developmental and epileptic encephalopathy caused by mutations in the CDKL5 gene located on the X chromosome. The condition typically presents in the first weeks to months of life with frequent, treatment-resistant seizures that persist throughout life. Beyond seizures, individuals experience severe limitations in motor function, cognitive development, and vision.
The hallmark feature is extremely early seizure onset combined with profound developmental impairment. Most people with CDKL5 continue to have multiple seizures daily despite anti-seizure medications. Additional challenges include movement disorders, sleep problems, and feeding difficulties that significantly impact quality of life for individuals and families.
Diagnosis requires genetic testing to identify CDKL5 mutations. While there is no cure, treatment focuses on seizure management, physical and occupational therapy, and supportive care to maximize quality of life.
Common Symptoms of CDKL5 Deficiency Disorder
Recognizing the signs of CDKL5 Deficiency Disorder early can lead to faster diagnosis and better outcomes. Symptoms may vary in severity from person to person. If you or a loved one are experiencing any of the following, consider speaking with a specialist.
- Severe seizures starting in infancy (usually by 3 months of age)
- Profound developmental delays affecting movement, speech, and cognition
- Vision problems including reduced eye focus and abnormal eye movements
- Sleep disruption with inability to sleep through the night
- Involuntary movements such as hand and leg jerking or dystonia
- Feeding difficulties and gastrointestinal problems like reflux and constipation
Who CDKL5 Deficiency Disorder Affects
CDKL5 is an X-linked condition affecting both males and females, though females are diagnosed about 4 times more often. Seizures begin within the first year of life, typically by 3 months. Males who inherit the condition often experience more severe developmental delays. About 99% of cases arise from new genetic mutations rather than being inherited from parents.
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FDA-Approved Treatments for CDKL5 Deficiency Disorder
There is currently 1 FDA-approved medication for CDKL5 Deficiency Disorder. These therapies represent the current standard of care and may be used alongside or compared against investigational treatments in active clinical trials.
Source: openFDA drug labeling data. This list may not include all treatments. Always consult your doctor.
Help Paying for CDKL5 Deficiency Disorder Treatment
Charity funds and drugmaker programs for CDKL5 Deficiency Disorder, checked at the source. Pick your insurance to see what fits.
Side Effect Explorer
Real-world side effect reports from the FDA Adverse Event Reporting System (FAERS). Includes both FDA-approved drugs and investigational therapies from active clinical trials. Click any drug to see what patients reported.
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Genetic Testing
Genetic testing can confirm a diagnosis, guide treatment decisions, and identify family members who may be at risk.
The CDKL5 gene page lists every condition Orphanet links to the gene and the open trials that name it.
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Trusted CDKL5 Deficiency Disorder Resources
Reputable organizations and medical references for learning more about CDKL5 Deficiency Disorder, including disease registries, foundation resources, and clinical guidelines.