Indacaterol maleate is primarily used as a long-acting beta-2 adrenergic agonist (LABA) for the treatment of chronic obstructive pulmonary disease (COPD). It helps to relax the muscles in the airways, improving breathing in patients with COPD by keeping the airways open for an extended period. This makes it effective in managing symptoms such as shortness of breath, wheezing, and coughing. It is typically administered via inhalation to ensure direct delivery to the lungs, providing rapid relief and sustained action. Indacaterol maleate is often prescribed as a once-daily maintenance treatment, offering convenience and improved adherence for patients. It is not intended for acute asthma attacks but rather for long-term management of airflow obstruction.