Figure 7 From: Role of bedside electroencephalography in the adult intensive care unit during therapeutic neuromuscular blockade Effect of fentanyl as an intravenous analgesic sedative. This anxious patient with postoperative pain was administered 100 mg intravenous fentanyl during continuous EEG monitoring. The frequency quickly diminished in about 3 min, demonstrating the rapid clinical action of the short-acting analgesic sedative.Back to article page