Review Question - QID 211065

A 79-year-old man, hospitalized for overnight monitoring after elective surgery, is found on morning rounds to be confused and disoriented. He was recovering well in the post-anesthesia care unit before being moved up to the inpatient floor unit; however, he was found to be delirious and agitated overnight. Therefore, he was given a dose of a drug that affects the opening frequency of a neuronal ion channel. During morning rounds, he is found to have weakness, tremors, uncoordinated muscle movements, blurred vision, and disorientation. Which of the following could be used to reverse the drug that was administered to this patient?