it is concluded that ( 1 ) chronic , severe stress produces only moderate elevations of plasma epinephrine levels ( up to 1.37 ng/ml ) , whereas acute stress produces marked increases of plasma epinephrine that may reach the extraordinarily high level of 35.9 ng/ml , ( 2 ) the potential toxicity from the adrenomedullary response to acute stress is further exacerbated by the parallel release of norepinephrine , and ( 3 ) under close medical monitoring , it is possible to survive with plasma epinephrine concentrations as high as 273 ng/ml .
C0014563
epinephrine
C0028351
norepinephrine