the duration of both were significantly prolonged by added norepinephrine from 96 +/- 17 min to 193 +/- 20 min ( sensory blockade ) and from 116 +/- 14 min to 204 +/- 34 min ( motor blockade ) , but were not changed by addition of epinephrine .
C0028351
norepinephrine
C0014563
epinephrine