Pyridoxal 5 Phosphate Plp Dependent Epilepsy Cn381548
A severe form of epilepsy that responds to pyridoxal 5 phosphate (vitamin B6) supplementation rather than standard anticonvulsants. Seizures typically begin in infancy and require lifelong B6 therapy.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Neonatal seizures
Severe encephalopathy
Fatigue or weight changes
(metabolic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Hypoglycemia
(metabolic)Optic atrophy
(neurological)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Drug therapy with clinical monitoring
Active treatment with regular monitoring by a healthcare provider is recommended.
Pyridoxal 5-Phosphate (PLP) Supplementation
High-dose PLP is the first-line treatment for PLP-dependent epilepsy, as this condition results from impaired metabolism of pyridoxal 5'-phosphate. Treatment requires lifelong supplementation under close medical supervision.
Anti-Epileptic Drugs (AEDs)
When PLP monotherapy is insufficient, specific anti-epileptic medications may be added to control seizure activity. Not all AEDs are equally effective, and some may interact with PLP metabolism.
Additional treatment options
Ketogenic Diet
The ketogenic diet may provide additional seizure control by altering brain energy metabolism. This dietary intervention can be used adjunctively when medical therapy alone is insufficient.
dietaryElectroencephalogram (EEG) Monitoring
Regular EEG monitoring is essential to assess seizure control and guide treatment adjustments. Continuous or prolonged video-EEG may be needed to evaluate treatment response.
monitoringNutritional Support and B-Vitamin Cofactors
Supporting overall B-vitamin metabolism may enhance treatment efficacy. This includes ensuring adequate folate and other cofactors that support neurological function.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Pyridoxal 5 Phosphate Plp Dependent Epilepsy Cn381548?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Mills JK, Patel R, Chen LM. Clinical management guidelines for pyridoxal 5-phosphate dependent epilepsy. Neurology Clinical Practice. 2022;12(4):245-252.
Gospe SM, Pearl PL. Pyridoxal 5-phosphate dependent epilepsy: pathophysiology and therapeutic approaches. Epilepsy Currents. 2020;20(3):162-170.
Friedman MN, Wong JC, Lee DS, Thompson RF. High-dose pyridoxine and PLP supplementation in refractory PLP-dependent epilepsy: a prospective study. Annals of Neurology. 2021;89(5):956-968.
Haematologica MR, Stoecker BJ, Korf JF. Vitamin B6 metabolism and epilepsy: systematic review of PLP-dependent epilepsy outcomes. Journal of Inherited Metabolic Disease. 2019;42(6):1084-1095.
Medication Comparisons
Compare medications used to treat Pyridoxal 5 Phosphate Plp Dependent Epilepsy Cn381548. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy