Formoterol Fumarate is the fumarate salt form of formoterol, a long-acting and selective sympathomimetic beta-receptor agonist with bronchodilator activity. Formoterol fumarate binds to beta 2 adrenergic receptors in bronchial smooth muscle and stimulates intracellular adenyl cyclase, thereby increasing the production of cyclic adenosine monophosphate. Increased cAMP levels cause relaxation of the bronchial smooth muscle, improve mucociliary clearance and reduce mediator substance release in inflammatory cells, especially from mast cells.
Arformoterol is a beta2-Adrenergic Agonist. The mechanism of action of arformoterol is as an Adrenergic beta2-Agonist.