A 78-year-old woman is brought in by her son. He is

concerned about her agitation. On examination, you note she is agitated and

appears confused about the date and time. She has a low grade fever and her

urinalysis is suggestive of a urinary tract infection. She is now physically

aggressive towards her son at the bedside and he is extremely distressed as she

starts hitting the nurse tending to her.

Which of the following treatment is the most appropriate

medication to manage her agitation?