Used as a long-acting bronchodilator for the management of asthma and chronic obstructive pulmonary disease (COPD). It works as a prodrug to terbutaline, gradually converting in the body to provide sustained relief of bronchospasm. Its once-daily dosing improves patient compliance compared to short-acting beta-agonists. Particularly beneficial for nighttime symptom control due to its prolonged action. Also shows potential in reducing airway hyperresponsiveness with regular use.