NCIt definition : The bitartrate salt form of epinephrine, a direct-acting sympathomimetic amine with
bronchodilator and vasoconstricting activity. Epinephrine bitartrate acts on both
alpha and beta adrenergic receptors. By stimulating alpha adrenergic receptors locally,
this agent causes vasoconstriction and reduces vascular blood flow. Administered in
the conjunctiva, epinephrine bitartrate induces vasoconstriction and decreases the
production of aqueous humor mediated through alpha-adrenergic receptors. Through its
beta-stimulating actions, this agent relaxes bronchial smooth muscle and causes bronchodilation.;