an injection of ovine growth hormone ( gh , 100 micrograms/kg ) or an equimolar amount of somatostatin ( somatotropin release inhibitory factor , srif , 7.5 micrograms/kg ) into a saphenous vein led , within the first 15 min , to a transient but significant increase in plasma serotonin and a decrease in the concentrations of dopamine , norepinephrine , and epinephrine .
C0028351
norepinephrine
C0014563
epinephrine