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Medications: Many medications can affect test results. With physician approval,
patients should discontinue all medications, unless contraindicated, for 24-72 hours
prior to testing. Any medications taken should be clearly noted on the test results.
Alcohol ingestion can affect VNG test results for 72 hours post-ingestion; results are
unpredictable because alcohol can be an agonist or antagonist.
Patient preparation: Inform patients that VNG may cause dizziness, nausea, or
both. Patients should be advised to limit food intake prior to examination and arrange
for transportation after the examination, which usually takes 1-1.5 hours.
Request the patient:
Dress comfortably.
DO NOT wear contact lenses to the exam
DO NOT wear eye make-up
For many parts of the test, mental tasking is necessary to prevent central
suppression of responses. If the examiner does not speak the patient’s language or
the patient is hearing- impaired, an interpreter may be necessary to assist in giving
instructions, explanations, and mental tasking.
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