OLODATEROL IS A LONG-ACTING BETA2-AGONIST FOR LONG-TERM, ONCE-DAILY MAINTENANCE BRONCHODILATION & NOT USEFUL IN ACUTE BRONCHO-CONSTRICTION. THE COMPOUND EXERTS ITS PHARMACOLOGICAL EFFECTS BY BINDING AND ACTIVATION OF BETA2-ADRENOCEPTORS AFTER TOPICAL ADMINISTRATION BY INHALATION. ACTIVATION OF THESE RECEPTORS IN THE AIRWAYS RESULTS IN A STIMULATION OF INTRACELLULAR ADENYL CYCLASE, AN ENZYME THAT MEDIATES THE SYNTHESIS OF CYCLIC-3', 5' ADENOSINE MONOPHOSPHATE (CAMP). ELEVATED LEVELS OF CAMP INDUCE BRONCHODILATION BY RELAXATION OF AIRWAY SMOOTH MUSCLE CELLS.