in 10 healthy male volunteers breathing 100 % oxygen , we determined the effect of four intravenous dose levels of fentanyl ( 0.0015 , 0.003 , 0.006 and 0.009 mg/kg ) and two of fentanyl plus droperidol ( i.e. , innovar , 0.003 and 0.006 mg/kg of fentanyl with 2.5 mg of droperidol for each 0.05 mg of fentanyl ) on peco2 and the slope of the ventilatory response to imposed increases in peco2 .
C0117480
fentanyl
C0015846
fentanyl