Migraine Familial Hemiplegic 2 C1865322
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
Hemiplegic migraine attacks
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Severe throbbing headache
(neurologic)Sensory aphasia
(neurologic)Ataxia between attacks
(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
Acetazolamide
Carbonic anhydrase inhibitor commonly used as first-line prophylactic treatment for familial hemiplegic migraine, helping to reduce attack frequency and severity by stabilizing neuronal excitability.
Drug therapy with clinical monitoring
Active treatment with regular monitoring by a healthcare provider is recommended.
Calcium Channel Blockers
Verapamil or diltiazem may be prescribed for migraine prophylaxis when acetazolamide is ineffective or contraindicated, working through vasodilatory and neurostabilizing mechanisms.
Additional treatment options
Migraine Trigger Avoidance
Systematic identification and avoidance of personal migraine triggers including stress, specific foods, sleep disturbances, and environmental factors to reduce attack frequency.
lifestylePost-Attack Rehabilitation
Targeted physical therapy focusing on motor recovery, strength training, and balance exercises following hemiplegic episodes to address residual weakness.
physical_therapyNeurological Monitoring
Regular neurological assessments and imaging studies to monitor disease progression, assess treatment efficacy, and rule out secondary causes of symptoms.
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 2 C1865322?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
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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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy