The critical task in dizziness is separating benign peripheral vertigo from a central cause that is a stroke until proven otherwise. These questions cover clarifying what the patient means by dizzy, the peripheral-versus-central discriminators, diagnosing BPPV and treating it with the Epley manoeuvre, vestibular neuritis and Meniere disease, and the findings that require urgent imaging. The 10 questions below carry full rationales, pitched at Family Nurse Practitioner board level.
Question 1
A 42-year-old man describes recurrent bouts of severe vertigo over the past six months. Which historical finding would make Meniere's disease the most likely diagnosis rather than BPPV?
- A) Episodes of fluctuating hearing loss✓
- B) Symptoms provoked by head movement
- C) Nausea and vomiting during episodes
- D) Resolution of symptoms within minutes
💡 Key Takeaway
Fluctuating sensorineural hearing loss is a core feature of Meniere's disease that is absent in BPPV.
Show rationale
Meniere's disease is driven by endolymphatic hydrops, which causes a classic triad of episodic vertigo, tinnitus, and fluctuating sensorineural hearing loss. The presence of auditory symptoms, particularly fluctuating hearing loss, is the key differentiator that rules out benign positional vertigo (BPPV), as BPPV strictly affects the semicircular canals without impacting the cochlea. Symptoms provoked by head movement and resolution of symptoms within minutes are hallmark features of BPPV, not Meniere's disease. Nausea and vomiting during episodes can occur with any severe vestibular disorder, including both BPPV and Meniere's, making it a poor differentiating factor. The auditory involvement is essential for diagnosing endolymphatic hydrops.
Question 2
A 78-year-old male with Parkinson disease reports feeling dizzy upon standing. His blood pressure is 130/80 mm Hg sitting and 105/65 mm Hg standing. He takes levodopa-carbidopa and hydrochlorothiazide for hypertension.
- A) Increase the levodopa-carbidopa dosage.
- B) Discontinue the hydrochlorothiazide prescription.✓
- C) Recommend strict bed rest precautions.
- D) Prescribe a vestibular suppressant medication.
💡 Key Takeaway
Managing orthostatic hypotension by adjusting contributing medications is essential for preventing falls in older adults.
Show rationale
This patient is experiencing symptomatic orthostatic hypotension, a major risk factor for falls in the elderly, particularly those with Parkinson disease. Hydrochlorothiazide is a diuretic that contributes to volume depletion and exacerbates orthostatic blood pressure drops. Discontinuing or adjusting this medication is the most appropriate intervention to reduce his fall risk. Increasing the levodopa-carbidopa dosage is incorrect because dopaminergic medications frequently worsen orthostatic hypotension. Recommending strict bed rest precautions is inappropriate as it rapidly leads to severe physical deconditioning, muscle atrophy, and an ultimately higher fall risk when the patient does mobilize. Prescribing a vestibular suppressant medication is incorrect because his dizziness is clearly related to postural blood pressure changes rather than a primary inner ear or vestibular pathology.
Question 3
A 75-year-old male with an eGFR of 35 mL/min/1.73 m² is starting gabapentin therapy for severe diabetic peripheral neuropathy. Which dosing strategy is most appropriate to accommodate his renal pharmacokinetic changes?
- A) Prescribe the maximum daily dose but divide it into smaller, more frequent doses.
- B) Maintain the standard starting dose but monitor serum creatinine every two weeks.
- C) Administer a loading dose followed by standard maintenance dosing to achieve steady state.
- D) Reduce the daily dose and extend the dosing interval to prevent drug accumulation.✓
💡 Key Takeaway
Renally cleared medications require dose reduction and extended intervals in moderate to severe renal impairment.
Show rationale
Gabapentin is entirely renally excreted, and its clearance declines linearly with reduced eGFR. In older adults with moderate renal impairment, the FNP must reduce the dose and extend the dosing interval to prevent toxic accumulation, which causes severe dizziness, somnolence, and falls. Option A is incorrect because dividing a maximum dose still results in total daily accumulation over time. Option B is wrong because standard dosing will cause clinical toxicity long before the two-week laboratory check. Option C is inappropriate as loading doses do not prevent the eventual toxic accumulation of standard maintenance doses in renal impairment.
Question 4
A 55-year-old woman reports a sudden onset of room-spinning dizziness that began while sitting stationary. The episode lasted for forty-five minutes and was accompanied by severe right-sided ear pressure and ringing. Which diagnosis best explains these specific clinical features?
- A) Acute vestibular neuritis
- B) Benign positional vertigo
- C) Acute labyrinthitis infection
- D) Idiopathic Meniere's disease✓
💡 Key Takeaway
Spontaneous vertigo lasting minutes to hours with unilateral aural fullness indicates Meniere's disease.
Show rationale
Idiopathic Meniere's disease presents with spontaneous episodes of vertigo that last from twenty minutes to several hours, accompanied by fluctuating hearing loss, tinnitus, and aural fullness. The fact that the vertigo began while stationary helps rule out benign positional vertigo, which is strictly provoked by head movement and lasts less than a minute. Acute vestibular neuritis causes continuous vertigo lasting days without auditory symptoms. Acute labyrinthitis infection also causes continuous vertigo lasting days, and while it includes hearing loss, the brief forty-five-minute duration in this scenario does not fit an acute infectious process. The combination of spontaneous onset, moderate duration, and unilateral auditory symptoms points directly to Meniere's disease.
Question 5
A 55-year-old male returns for follow-up after starting tamsulosin 0.4 mg daily for benign prostatic hyperplasia. His IPSS decreased from 18 to 14 over four weeks. He reports mild dizziness upon standing in the mornings. Which action is most appropriate to evaluate and manage his care plan?
- A) Discontinue tamsulosin and start daily finasteride.
- B) Continue current dose and take at bedtime.✓
- C) Increase tamsulosin dose to improve symptoms.
- D) Refer to urology for surgical evaluation.
💡 Key Takeaway
A three-point IPSS reduction indicates clinical efficacy, while orthostatic dizziness is managed by bedtime dosing.
Show rationale
The patient demonstrates a clinically meaningful response to tamsulosin, as a three-point reduction in the International Prostate Symptom Score indicates effective symptom management. Since the medication is working, discontinuing it for finasteride or referring to urology is premature and inappropriate. Increasing the dose would likely worsen his side effects without offering necessary benefits. Tamsulosin frequently causes orthostatic hypotension, which presents as morning dizziness when the medication is taken earlier in the day. The best approach is to maintain the current effective dose but shift administration to bedtime. This simple adjustment maximizes the therapeutic benefits while minimizing the impact of peak-dose vasodilation on his daily activities, ensuring the plan of care remains both safe and effective.
Question 6
A 50-year-old female presents with recurrent episodic vertigo. The nurse practitioner needs to differentiate between benign positional vertigo and Meniere's disease. Which specific clinical finding would definitively prioritize benign positional vertigo over Meniere's disease?
- A) Low-frequency hearing loss
- B) Spontaneous resting nystagmus
- C) Positive Dix-Hallpike maneuver✓
- D) Prolonged episodic vertigo
💡 Key Takeaway
The Dix-Hallpike maneuver specifically identifies the mechanical canalithiasis that causes benign paroxysmal positional vertigo.
Show rationale
The Dix-Hallpike maneuver is the gold standard diagnostic test for benign positional vertigo, and a positive result—characterized by observable nystagmus provoked by the maneuver—confirms the presence of displaced otoconia in the posterior semicircular canal. In contrast, low-frequency hearing loss is a hallmark of Meniere's disease, not benign positional vertigo. Spontaneous resting nystagmus suggests an acute unilateral vestibular loss, such as vestibular neuritis, rather than a positional etiology. Prolonged episodic vertigo lasting hours aligns with Meniere's disease, whereas benign positional vertigo episodes last only seconds to minutes. Therefore, a positive provocative maneuver directly identifies the mechanical vestibular dysfunction unique to benign positional vertigo.
Question 7
A 20-year-old college student presents with a sensation of skipped heartbeats during finals week. He admits to consuming high amounts of caffeine and sleeping poorly. His cardiovascular examination is otherwise completely normal. Which diagnosis is most consistent with this presentation?
- A) Paroxysmal atrial fibrillation rhythm
- B) Sustained ventricular tachycardia event
- C) Frequent premature ventricular contractions✓
- D) Atrioventricular nodal reentrant tachycardia
💡 Key Takeaway
Skipped beats in healthy young adults using stimulants like caffeine are typically premature ventricular contractions.
Show rationale
The sensation of skipped beats in a healthy young adult consuming excessive caffeine is the classic presentation of premature ventricular contractions. A paroxysmal atrial fibrillation rhythm presents as an irregularly irregular pulse, not isolated skipped beats. A sustained ventricular tachycardia event causes continuous rapid rates and significant dizziness or syncope. Atrioventricular nodal reentrant tachycardia presents with sudden sustained regular tachycardia rather than occasional skipped beats.
Question 8
An 82-year-old female with a history of osteoarthritis presents for her annual wellness visit. She reports feeling unsteady when walking to the bathroom at night but denies any recent falls, dizziness, or visual changes. Which action is most appropriate to evaluate her current complaint?
- A) Perform the Timed Up and Go mobility test.✓
- B) Administer the Montreal Cognitive Assessment in the clinic.
- C) Order a screening dual-energy X-ray absorptiometry bone scan.
- D) Prescribe a four-point walker for nighttime home use.
💡 Key Takeaway
The Timed Up and Go test is the gold standard for assessing functional mobility and fall risk.
Show rationale
The Timed Up and Go test is a validated, quick assessment to evaluate dynamic balance, mobility, and fall risk in older adults, directly addressing her unsteadiness. Administering a cognitive assessment is helpful for dementia screening but does not evaluate the mechanical unsteadiness reported here. Ordering a bone scan screens for osteoporosis but does not assess her immediate risk of falling. Prescribing a walker without first performing a functional mobility assessment is premature and could actually increase her risk of falls if she uses the device incorrectly.
Question 9
A 55-year-old patient with a history of severe alcohol use disorder presents to the emergency department with an acute onset of profound confusion and a wide-based unsteady gait. Which additional focused neurological finding best supports the suspected etiology?
- A) Unilateral facial droop with expressive aphasia.
- B) Sluggish pupillary response with horizontal nystagmus.✓
- C) Bilateral cogwheel rigidity with resting tremors.
- D) Pronator drift with hyperreflexive deep tendons.
💡 Key Takeaway
Wernicke encephalopathy classically presents with a triad of confusion, ataxia, and oculomotor dysfunction.
Show rationale
This patient presents with confusion and ataxia in the setting of chronic alcohol use, which is highly suspicious for Wernicke encephalopathy. The classic triad for this condition includes encephalopathy, gait ataxia, and oculomotor dysfunction. Finding horizontal nystagmus or sluggish pupils strongly supports this nutritional deficiency diagnosis. A unilateral facial droop suggests an acute ischemic stroke. Cogwheel rigidity points toward Parkinson disease or medication side effects. Pronator drift typically indicates an upper motor neuron lesion rather than a metabolic or vitamin deficiency issue.
Question 10
An 82-year-old frail female is taking losartan 50 mg and hydrochlorothiazide 12.5 mg daily. Her seated blood pressure is 128/70 mmHg. She reports feeling dizzy when getting out of bed. Her standing BP is 108/60 mmHg. Which action is most appropriate?
- A) Discontinue the hydrochlorothiazide and reassess her symptoms in two weeks.✓
- B) Maintain current medications and advise her to change positions slowly.
- C) Switch her losartan to a long acting calcium channel blocker.
- D) Order an electrocardiogram to rule out a new cardiac arrhythmia.
💡 Key Takeaway
Symptomatic orthostatic hypotension in frail older adults requires immediate de-escalation of antihypertensive therapy.
Show rationale
This frail older adult is experiencing symptomatic orthostatic hypotension, which is clearly evidenced by her subjective dizziness and a significant drop in her standing blood pressure compared to her seated baseline. Intensive blood pressure control in frail elderly patients can easily lead to dangerous falls, fractures, and increased morbidity. Discontinuing the thiazide diuretic is the safest and most appropriate initial step to reduce volume depletion and correct the orthostasis. Maintaining the current regimen and simply advising slow position changes ignores the iatrogenic cause of her distressing symptoms. Switching to a calcium channel blocker does not resolve the underlying volume issue. An electrocardiogram is unnecessary since the orthostatic vitals clearly explain her dizziness.
