NCIt definition : A long-acting beta-2 adrenergic agonist and isomer of formoterol with bronchodilator
activity. Arformoterol selectively binds to and activates beta-2 adrenergic receptors
in bronchiolar smooth muscle, thereby causing stimulation of adenyl cyclase, the enzyme
that catalyzes the conversion of adenosine triphosphate (ATP) to cyclic-3',5'-adenosine
monophosphate (cAMP). Increased intracellular cAMP levels cause relaxation of bronchial
smooth muscle and lead to a reduced release of inflammatory mediators from mast cells.
This may eventually lead to an improvement of airway function.;