What are the indications, initial treatment options, and recommended investigations for vertigo, seizures, and migraine?

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Last updated: November 15, 2026 • View editorial policy

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Vertigo, Seizures, and Migraine: Indications, Treatment, and Investigations

VERTIGO

Clinical Approach and Imaging Indications

For brief episodic vertigo triggered by head movements (BPPV), no imaging is indicated unless atypical features are present, such as lack of nystagmus on Dix-Hallpike testing or failure to respond to Epley maneuvers 1.

The diagnostic approach depends on the clinical presentation:

Acute Persistent Vertigo (Acute Vestibular Syndrome)

  • Normal neurologic exam + HINTS consistent with peripheral vertigo: Vestibular neuritis is most likely; imaging is NOT recommended 1

    • Exception: MRI head without contrast may be helpful in high vascular risk patients or when a HINTS-trained practitioner is unavailable 1

  • Abnormal neurologic exam OR HINTS consistent with central vertigo: Posterior circulation infarct is suspected

    • Recommended: MRI head without IV contrast 1
    • CT head without contrast is less sensitive but may be appropriate as initial imaging before MRI 1
    • Common pitfall: Normal neurologic examination does NOT exclude posterior circulation infarct 1

Chronic Recurrent Vertigo

  • With unilateral hearing loss or tinnitus (Menière disease suspected):

    • MRI head and internal auditory canal (IAC) without and with IV contrast 1
    • CT temporal bone without IV contrast 1
    • Purpose: Exclude vestibular schwannoma or superior semicircular canal dehiscence 1

  • With brainstem neurologic deficits (vertebrobasilar insufficiency suspected):

    • MRI head without IV contrast for posterior circulation infarcts 1
    • MRA or CTA of head and neck for vascular evaluation 1

Vestibular Migraine

Vestibular migraine affects up to 3% of the population and requires at least 5 attacks of vertigo (5 minutes to 72 hours duration) with moderate intensity, accompanied by migraine symptoms in at least every second attack 2, 3.

  • Diagnostic workup typically reveals no structural abnormalities; MRI and quantitative vestibular testing are usually normal 2
  • Look for: spontaneous persistent vertigo/dizziness, positional vertigo, accompanying hearing loss, photophobia, phonophobia, visual aura 2, 3
  • Acute treatment: Based on migraine protocols, but triptans should NOT be used in isolated vertigo/dizziness episodes 2
  • Prophylactic treatment:
    • First-line: Flunarizine (based on randomized trials) 4, 5
    • Second-line: Propranolol, topiramate (strongest evidence), venlafaxine, valproic acid 4, 5
    • Emerging: Anti-CGRP monoclonal antibodies (erenumab, galcanezumab) show favorable efficacy for refractory cases 6, 5
    • Adjunct: Vestibular rehabilitation provides functional benefits 4, 5

Nonspecific Dizziness

Usually no imaging is indicated due to low diagnostic yield 1. MRI head without contrast may be useful in high-risk patients for detecting posterior circulation infarct 1.

SEIZURES

Functional Neurological Seizures and Migraine Connection

Migraine attacks may trigger functional neurological disorder seizures (FND-seizures) more commonly than currently recognized, and migraine prophylaxis alone can reduce FND-seizure frequency by >50% in 73% of cases 7.

Key Diagnostic Features

  • FND-seizures show stronger associations with migraine than epileptic seizures do 7
  • In patients with both conditions, migraine attacks triggered FND-seizures in 65% of cases 7
  • Look for: episodic epilepsy-like events, neuronal hyperexcitability patterns, endolymphatic hydrops on cervical vestibular evoked myogenic potential testing 8

Treatment Approach

Migraine prophylactic medications alone (without behavioral interventions) can concomitantly reduce both FND-seizure and headache frequency 7. This represents a critical treatment opportunity often missed in clinical practice.

MIGRAINE

Acute Treatment

The combination of a triptan and an NSAID is the most effective acute treatment for moderate to severe episodic migraine, superior to monotherapy with CGRP antagonists (gepants), acetaminophen, or NSAIDs alone 9.

Treatment Hierarchy for Acute Episodic Migraine

  1. First-line: Triptan + NSAID combination

    • Higher likelihood of pain freedom and relief at 2 hours 9
    • Sustained pain freedom up to 48 hours 9
    • Cost-effective compared to newer agents 9

  2. Alternative monotherapies (when combination not feasible):

    • Triptan alone
    • NSAID alone
    • Acetaminophen

  3. CGRP antagonists-gepants (rimegepant, ubrogepant, zavegepant):

    • Lower likelihood of pain freedom compared to triptan + NSAID combination 9
    • Significantly higher cost: oral formulations $4,959-$5,994 annually; intranasal $8,800 annually 9
    • Consider when triptans contraindicated or ineffective

  4. Dihydroergotamine:

    • May not differ from triptans in pain relief at 2 hours 9
    • Triptans have higher likelihood of freedom from nausea/vomiting and lower rescue medication use 9
    • Cost: intranasal $1,320, injectable $4,042 annually 9

  5. Lasmiditan: Insufficient comparative evidence for prioritized outcomes 9

Critical Caveats

  • Do NOT use triptans for isolated vertigo/dizziness in vestibular migraine 2
  • Most studies focused on single migraine headaches; efficacy data across multiple attacks is limited 9
  • Neurostimulating devices can be considered for acute treatment 4

Prophylactic Treatment

For vestibular migraine specifically, flunarizine should be considered first-line prophylaxis based on randomized trial evidence 4, 5.

For general migraine prophylaxis in patients with vertigo:

  • Beta-blockers (propranolol): Consistent symptom reduction 5
  • Antiepileptics (topiramate): Strong evidence for efficacy 5
  • Anti-CGRP monoclonal antibodies: Favorable efficacy and tolerability for refractory cases 6, 5
  • Vestibular rehabilitation as adjunct therapy 5

CHRONIC DISEQUILIBRIUM

Cerebellar Ataxia

MRI head without IV contrast or MRI head without and with IV contrast is most helpful for assessing cerebellar atrophy or pathology 1. Add MRI cervical and thoracic spine without contrast if spinal cord involvement is suspected 1.

Sensory/Proprioceptive Ataxia

MRI cervical and thoracic spine without IV contrast or with and without IV contrast is most helpful for evaluating dorsal column pathology or spinal cord atrophy 1.

References

1
Guideline

acr appropriateness criteria® dizziness and ataxia: 2023 update.

Journal of the American College of Radiology, 2024

5
Research

Prophylactic Management of Vestibular Migraine: A Systematic Review.

Annals of clinical and translational neurology, 2025

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Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.