epinephrine, from the adrenal medulla.
Anatomically, the adrenal medulla develops from neural crest tissue, and it is directly controlled by sympathetic NS. The medullary cells respond to this stimulation by releasing epineprhrine (80%)...
Drugs called 'sympathomimetics'. Their mechanism of action is primarily on adrenergic receptors (i.e., the receptors that normally bind adrenalin).
norepinephrine
epinephrine and norepinephrine stimulate the sympathetic nervous system