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A 67 year-old man with no fixed address presents to the Emergency Department after seizure activity was observed by a bystander on the street. He admits to a history of heavy alcohol consumption. He appears to be suffering from alcohol withdrawal, but he has no focal neurological deficits and normal vital signs including glucose. He has never had a seizure before. Your presumptive diagnosis is alcohol withdrawal seizure. In addition to managing his withdrawal, you consider whether a CT head is warranted. Which of the following statements represents the BEST decision and rationale for this patient?