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New page: '''Norepinephrine''' (chemical name C<sub>8</sub>H<sub>11</sub>NO<sub>3</sub>)is a catecholamine present in the human brain, sometimes referred to as noradrenaline. Norepinephrine acts as...
'''Norepinephrine''' (chemical name C<sub>8</sub>H<sub>11</sub>NO<sub>3</sub>)is a catecholamine present in the human brain, sometimes referred to as noradrenaline. Norepinephrine acts as a [[hormone]] when it is released from the [[adrenal gland]]s into the bloodstream. In concert with [[epinephrine]], norepinephrine influences the [[fight or flight]] response by increasing heart rate and muscle readiness, and increasing energy by causing [[glucose]] release, thereby heightening readiness to respond (e.g., to fight or flee) to a stressful event.
Norepinephrine also acts as a [[neurotransmitter]] in the [[central nervous system]] and [[sympathetic nervous system]]. It influences alertness and arousal, and lower levels are associated with [[depression|depressed mood]]. Many [[antidepressant]] medications cause increased norepinephrine levels in the brain. Drugs that increase norepinephrine are also used in the treatment of [[Attention Deficit Hyperactivity Disorder]] and [[hypotension]] (low blood pressure).
Norepinephrine also acts as a [[neurotransmitter]] in the [[central nervous system]] and [[sympathetic nervous system]]. It influences alertness and arousal, and lower levels are associated with [[depression|depressed mood]]. Many [[antidepressant]] medications cause increased norepinephrine levels in the brain. Drugs that increase norepinephrine are also used in the treatment of [[Attention Deficit Hyperactivity Disorder]] and [[hypotension]] (low blood pressure).