Migraine Familial Hemiplegic 3 C1864987
An inherited migraine disorder causing headaches with temporary weakness on one side of the body. It runs in families and requires careful trigger management. Treatment includes standard migraine medications.
Key facts at a glance
- ICD-10
- G40.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Motor weakness during aura
Seizures
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Photophobia and phonophobia
(neurologic)Nausea and vomiting
(neurologic)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
Flunarizine
Calcium channel blocker with strong migraine prophylactic properties, particularly effective in familial hemiplegic migraine variants due to its neurostabilizing effects.
Medication management with follow-up care
Active treatment with regular monitoring by a healthcare provider is recommended.
Sodium Channel Modulating Agents
Certain anticonvulsants that modulate sodium channels may be used for migraine prophylaxis in FHM3, addressing the underlying neuronal channelopathy.
Additional treatment options
Magnesium Supplementation
Oral magnesium supplementation to address potential neuronal hyperexcitability, commonly used as adjunctive therapy in migraine prophylaxis.
dietaryStress Management and Sleep Hygiene
Cognitive-behavioral techniques and sleep optimization to reduce stress-induced migraine attacks and improve overall symptom control.
lifestyleElectroencephalogram Monitoring
EEG monitoring may be considered in FHM3 due to SCN1A associations, to evaluate for seizure activity that may coexist with hemiplegic migraine attacks.
monitoringWhen 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 Migraine Familial Hemiplegic 3 C1864987?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
Compare medications used to treat Migraine Familial Hemiplegic 3 C1864987. 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 26, 2026. · Read our editorial policy