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Norepinephrine, also known as noradrenaline and sold under the brand name Levophed among others, is a medication used to treat people with very low blood pressure. [2] It is the typical medication used in sepsis if low blood pressure does not improve following intravenous fluids . [ 3 ]
Norepinephrine is synthesized from the amino acid tyrosine by a series of enzymatic steps in the adrenal medulla and postganglionic neurons of the sympathetic nervous system, while the norepinephrine that functions as a neurotransmitter in the brain is produced in the locus coeruleus, located in the pons of the brainstem. [11]
Droxidopa is a prodrug of norepinephrine used to increase the concentrations of these neurotransmitters in the body and brain. [4] It is metabolized by aromatic L-amino acid decarboxylase (AAAD), also known as DOPA decarboxylase (DDC).
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This multi-page article lists pharmaceutical drugs alphabetically by name. Many drugs have more than one name and, therefore, the same drug may be listed more than once. ...
l-DOPA is produced from the amino acid l-tyrosine by the enzyme tyrosine hydroxylase. l-DOPA can act as an l-tyrosine mimetic and be incorporated into proteins by mammalian cells in place of l-tyrosine, generating protease-resistant and aggregate-prone proteins in vitro and may contribute to neurotoxicity with chronic l-DOPA administration. [10]
Compared to dextroamphetamine, pseudoephedrine is about 30 to 35 times less potent as a norepinephrine releasing agent and 80 to 350 times less potent as a dopamine releasing agent in vitro. [24] [83] [84] Pseudoephedrine is a very weak reversible inhibitor of monoamine oxidase (MAO) in vitro, including both MAO-A and MAO-B (K i = 1,000–5,800 ...
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