the following times ( mean and sem ) were significantly ( p less than 0.05 ) shorter for sufentanil than for fentanyl or morphine : induction ( 15 +/- 2.3 min , 5.9 +/- 0.7 min , and 3.0 +/- 0.2 min for morphine , fentanyl , and sufentanil , respectively ) ;
C0015846
fentanyl
C0143993
sufentanil