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Norepinephrine (NE), also called noradrenaline (NA) or noradrenalin, is an organic chemical in the catecholamine family that functions in the brain and body as a hormone, neurotransmitter and neuromodulator. The name "norepinephrine" is usually preferred in the United States, whereas "noradrenaline" is more commonly used in the United Kingdom and the rest of the world. "Norepinephrine" is also the international nonproprietary name given to the drug. Regardless of which name is used for the subst