large amounts ( 0.6 micrograms/kg/min ) of epinephrine , norepinephrine , and isoproterenol stimulated the release of gastrointestinal irg , and catecholamine-induced gastrointestinal irg release was completely abolished by simultaneous infusion of the specific beta receptor-blocking compound , propranolol , but not by alpha receptor blockade with phentolamine .
C0014563
epinephrine
C0028351
norepinephrine