| Section2 = }} Norepinephrine (INN) (abbreviated norepi or NE) or noradrenaline (BAN) is a catecholamine with dual roles as a hormone and a neurotransmitter. Norepinephrine is synthesized from dopamine by dopamine β-hydroxylase. It is released from the adrenal medulla into the blood as a hormone, and is also a neurotransmitter in the central nervous system and sympathetic nervous system where it's released from noradrenergic neurons. The actions of norepinephrine are carried out via the… (More on Noradrenaline)