RESULTS	Hemodynamic response to intubation was decreased by the administration of fentanyl ; the mean increase of systolic blood pressure after intubation was 65 mmHg from preintubation value without fentanyl , 50 mmHg after 2 micrograms.kg-1 , and 37 mmHg after 4 micrograms.kg-1 ( P < 0.05 for 2 and 4 micrograms.kg-1 vs. no fentanyl and for 4 vs. 2 micrograms.kg-1 ) .\