How should a patient with daily headaches and associated dizziness be evaluated and managed?

Evaluation and Management of Daily Headaches with Dizziness

A patient with daily headaches and associated dizziness should first be evaluated for red flags to exclude secondary causes, then assessed for chronic migraine or vestibular migraine, with consideration for medication overuse headache (MOH) as a key reversible factor.

Initial Evaluation: Rule Out Secondary Causes

Before assuming a primary headache disorder, systematically exclude dangerous secondary causes by looking for specific red flags 1, 2:

• Thunderclap headache (subarachnoid hemorrhage)
• Progressive worsening or new onset after age 50 (space-occupying lesion, temporal arteritis)
• Neurological deficits on examination
• Headache worsened by Valsalva maneuvers or awakening from sleep
• Fever, neck stiffness, altered consciousness
• Recent head trauma

If any red flags are present, neuroimaging (MRI preferred) is warranted 2. If absent and examination is normal, proceed to primary headache evaluation.

Diagnostic Framework: Chronic Migraine vs. Vestibular Migraine

Chronic Migraine Diagnosis

Ask the patient directly: "Do you feel like you have a headache of some type on 15 or more days per month?" 1

Chronic migraine criteria 3, 1:

• ≥15 headache days per month for ≥3 months
• ≥8 days per month with migraine features (throbbing, moderate-severe intensity, nausea, photophobia/phonophobia)
• Each headache lasting ≥4 hours

Critical pitfall: Patients often underreport milder headache days, focusing only on severe episodes. A headache diary is essential for accurate diagnosis 1.

Vestibular Symptoms in Headache Disorders

Dizziness occurs in 25% of tension-type headache patients and is even more common in migraine 4. The combination of daily headaches with dizziness suggests either:

• Chronic migraine with vestibular features
• Vestibular migraine (though typically episodic, not daily) 5, 6
• Persistent postural-perceptual dizziness (PPPD) triggered by migraine 5

Critical Step: Assess for Medication Overuse Headache

Before initiating any preventive therapy, determine if MOH is present 3:

MOH occurs when:

• Headaches present ≥15 days/month
• Regular overuse of acute headache medications (NSAIDs >15 days/month, triptans >10 days/month, opioids any regular use)

Management of MOH is straightforward but essential:

• Abrupt withdrawal of overused medication (except opioids, which require tapering) 3
• Patient education that symptoms will worsen before improving 3
• This is the ONLY remedy for MOH and must be done before preventive therapy can be effective 3

Treatment Algorithm

Step 1: If MOH Present

1. Stop overused acute medications immediately (except opioids) 3
2. Educate patient about temporary worsening
3. Wait for re-emergence of underlying headache pattern
4. Then proceed to Step 2

Step 2: Initiate Preventive Therapy for Chronic Migraine

First-line evidence-based options 3:

• Topiramate 50-100 mg daily - Only medication with proven efficacy in randomized controlled trials for chronic migraine 1
  • Preferred if patient has obesity (causes weight loss) 3
  • Contraindicated in pregnancy, glaucoma, nephrolithiasis 3

Alternative first-line options 3:

• Beta-blockers (propranolol, metoprolol)
• Candesartan (angiotensin receptor blocker)

Second-line options 3:

• Amitriptyline 10-100 mg at night - preferred if depression or sleep disturbances present 3
• Flunarizine 5-10 mg daily

Step 3: If First-Line Preventives Fail

Refer to specialist care 3 for consideration of:

• OnabotulinumtoxinA (Botox) - FDA-approved for chronic migraine prophylaxis, 155-195 units to 31-39 sites every 12 weeks 1, 3
• CGRP monoclonal antibodies (erenumab, fremanezumab, galcanezumab) - proven effective after 2-3 preventive failures 3

Step 4: Acute Treatment During Preventive Therapy

Patients still need acute treatment for breakthrough headaches 3:

• NSAIDs (ibuprofen, naproxen, diclofenac) - first-line
• Triptans - second-line, taken early when headache is mild
• Limit acute medication use to <10 days/month for triptans, <15 days/month for NSAIDs to prevent MOH recurrence 3

Avoid opioids and barbiturates - questionable efficacy, high dependency risk, worsen MOH 3, 2

Address Comorbidities and Triggers

Screen for and manage 3:

• Anxiety and depression (present in majority of chronic migraine patients, higher HAD scores in those with dizziness 4)
• Sleep disturbances
• Obesity (risk factor for transformation to chronic migraine)
• Caffeine overuse
• Stress

These comorbidities influence treatment choice and their management improves migraine outcomes 3.

Follow-Up Strategy

• Reassess in 2-3 months after treatment initiation 3
• Use headache diary to track frequency, severity, and acute medication use 3
• Goal: sustained efficacy for 6 months before returning to primary care management 3
• Refer back to specialist if: inadequate response after adequate trial of 2-3 preventive medications 3

Key Clinical Pitfalls to Avoid

1. Failing to identify and withdraw overused medications - MOH will prevent any preventive therapy from working 3
2. Not using a headache diary - leads to inaccurate diagnosis and inability to track treatment response 1
3. Attributing all symptoms to migraine without ruling out red flags - miss dangerous secondary causes 1, 2
4. Allowing unlimited acute medication use - perpetuates MOH cycle 3
5. Not screening for psychiatric comorbidities - these are more pronounced in chronic migraine with vestibular symptoms and affect treatment outcomes 3, 4