What are the recommended medications for treating vertigo?

Medications for Vertigo

For acute vertigo attacks, offer a limited course of vestibular suppressants (antihistamines, anticholinergics, or benzodiazepines) for symptom control only during active episodes, not for chronic use, as prolonged use interferes with central compensation and delays recovery. 1

Acute Symptomatic Management

First-Line Vestibular Suppressants

• Antihistamines (e.g., meclizine, dimenhydrinate) are the most commonly used agents for peripheral vertigo and should be prescribed primarily as-needed rather than scheduled 2, 3, 4
• Anticholinergics (scopolamine, atropine) block muscarinic receptors and suppress acute vertigo attacks, but scopolamine is primarily designed for motion sickness prevention 1, 2
• Benzodiazepines provide rapid symptom relief but carry significant risk for drug dependence and should only be used short-term 1, 4

Critical Limitations of Vestibular Suppressants

• Use vestibular suppressants only during acute attacks, not as maintenance therapy, because they interfere with central vestibular compensation 1, 2
• Scopolamine causes blurred vision, dry mouth, dilated pupils, urinary retention, and sedation; due to toxicity and withdrawal effects when used beyond several days, it is not commonly prescribed for Ménière's disease-associated vertigo 1, 2
• Anticholinergics are an independent risk factor for falls, especially in elderly patients 2
• There is insufficient evidence demonstrating superiority of any specific vestibular suppressant class over another 1, 2

Antiemetic Therapy

• Prochlorperazine may be considered for short-term management of severe nausea/vomiting associated with vertigo 2, 3
• Dopamine receptor antagonists serve as antiemetics but also have vestibular suppressant properties 4

Recent Evidence on Alternative Agents

• A 2025 randomized trial found that combination therapy with diphenhydramine plus sodium bicarbonate (66.4 mEq IV) provided superior vertigo relief compared to diphenhydramine alone (VAS improvement -5.6 vs -4.4, P=0.01), with less rescue medication needed (17.8% vs 46.7%) 5
• Sodium bicarbonate alone showed similar efficacy to diphenhydramine but with less lethargy (8.1% vs 38.7% moderate lethargy), though more injection site discomfort 5

Disease-Specific Pharmacotherapy

Ménière's Disease

• High-dose betahistine (at least 48 mg three times daily, not the commonly prescribed 16 mg TID) reduces attack frequency by increasing inner ear blood flow 1, 6, 7
• Insufficient evidence supports lower betahistine doses (16 mg TID or 48 mg TID total daily) 6
• Intratympanic steroids may be offered for active Ménière's disease 1
• Intratympanic gentamicin should be offered for active disease not responsive to nonablative therapy 1

Vestibular Migraine

• Treat analogously to migraine without aura using prophylactic agents: L-channel calcium channel antagonists (flunarizine has one RCT), beta-blockers (metoprolol), tricyclic antidepressants, or topiramate 6, 3, 4
• One RCT supports flunarizine; clinical experience supports beta-blockers and topiramate despite lack of RCTs 6

Vestibular Paroxysmia

• Oxcarbazepine is effective (supported by one RCT) 6
• Carbamazepine is also used and has ongoing RCT evaluation (VESPA trial) 6, 3

Central Vestibular Disorders

• Aminopyridines (4-aminopyridine, 3,4-diaminopyridine) are recommended for downbeat nystagmus (two RCTs) and episodic ataxia type 2 (one RCT) 6, 7, 3
• These potassium channel blockers increase cerebellar Purkinje cell activity and normalize irregular firing 7

Acute Vestibular Neuritis

• Oral corticosteroids improve recovery of peripheral vestibular function when given early 6, 7
• Use vestibular suppressants only briefly, then discontinue to allow central compensation 4

Non-Pharmacologic Essentials

• Vestibular rehabilitation/physical therapy should be offered for patients who have failed less definitive therapy 1
• Dietary modifications for Ménière's disease: limit sodium intake, avoid excessive caffeine/alcohol/nicotine, maintain hydration, manage stress, ensure adequate sleep 1
• Assess for sleep apnea in patients with increased vertigo episodes 1

What NOT to Do

• Do not prescribe positive pressure therapy for Ménière's disease 1
• Do not use prolonged vestibular suppressants, as they delay compensation 2
• Do not routinely measure vitamin B12 for central vertigo unless other neurological signs suggest deficiency (polyneuropathy, cognitive impairment, macrocytic anemia, spinal cord signs) 8
• Do not expect B12 supplementation to resolve central vertigo even if deficiency is found 8