A client was admitted to the hospital for a TURP. Within 48 hours of admission and 12 hours postoperatively, both the blood pressure and pulse increased. He became agitated, thought snakes were crawling on his arms and legs, and generally became unmanageable. He pulled out his IV and urinary catheter in attempt to rid himself of the snakes. He was sweating profusely. The admission nurse's notes indicated that the client admitted to having a few drinks now and then."He is probably experiencing which of the following?"