epinephrine

epinephrine (ep´i-nef´rin)

4-[1-hydroxy-2-(methylamino)ethyl]-1,2-benzenediol;a catecholamine that is the chief neurohormone of the adrenal medulla of most species. The l-isomer is the most potent stimulant (sympathomimetic) of adrenergic a- and beta-receptors, resulting in increased heart rate and force of contraction, vasoconstriction or vasodilation, relaxation of bronchiolar and intestinal smooth muscle, glycogenolysis, lipolysis, and other metabolic effects; used in the treatment of bronchial asthma, acute allergic disorders, open-angle glaucoma, and heart block, and as a topical and local vasoconstrictor. Generally used salts are e. hydrochloride and e. bitartrate, the latter most frequently used in topical preparations.adrenaline; [epi- + G. nephros, kidney, + -ine]

 

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