Final answer:
The patient's symptoms are consistent with Ménière's disease, a disorder of the inner ear. Treatment options include medications and lifestyle modifications.
Step-by-step explanation:
The patient's presentation of sudden vertigo, nausea, vomiting, nystagmus, poor balance, dysarthria, and ataxia suggests a diagnosis of Ménière's disease. Ménière's disease is a disorder of the inner ear that can cause episodes of vertigo, hearing loss, and tinnitus. Its exact cause is unknown, but it is believed to be related to the accumulation of fluid in the inner ear. Treatment may include medications to alleviate symptoms and lifestyle modifications.