Which treatment of benign paroxysmal positional vertigo...

Which treatment of benign paroxysmal positional vertigo associated with nausea is unlikely to be effective?
(A) Diphenhydramine intramuscularly.
(B) Ondansetron intravenously.
(C) Scopolamine transdermal patch.
(D) Intramuscular promethazine followed by the Epley maneuver.

Key Concepts

Benign Paroxysmal Positional Vertigo (BPPV)

BPPV is a common vestibular disorder where dislodged otoliths in the inner ear enter the semicircular canals, leading to brief episodes of vertigo triggered by head movements. Understanding BPPV is fundamental to recognizing that its treatment should address the underlying mechanical dysfunction rather than solely the symptoms.

Epley Maneuver

The Epley maneuver is a physical repositioning technique designed to treat BPPV by guiding the dislodged otoliths back to their appropriate location in the inner ear. It directly addresses the root cause of BPPV and is essential for effective treatment, making maneuvers like these more beneficial than agents that only control symptoms.

Vestibular Antiemetic Agents

Medications such as antihistamines (e.g., diphenhydramine) and anticholinergics (e.g., scopolamine) are used to palliate nausea and dizziness stemming from vestibular disturbances. These agents work on central pathways that mediate vestibular-induced nausea, helping to alleviate symptoms while the underlying cause is being managed.

Ondansetron

Ondansetron is a 5-HT3 receptor antagonist that is primarily effective in treating nausea and vomiting from causes like chemotherapy but does not address the vestibular pathways involved in BPPV-related nausea. Its mechanism makes it less suited for managing the specific type of nausea that arises from inner ear disorders like BPPV.

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