Aclidinium bromide is primarily used as a long-acting muscarinic antagonist (LAMA) in the management of chronic obstructive pulmonary disease (COPD). It works by relaxing the muscles around the airways, making it easier to breathe. This medication is typically administered via inhalation, ensuring it acts directly on the lungs to provide relief from symptoms like shortness of breath, wheezing, and coughing. It is often prescribed as a maintenance treatment to help control COPD symptoms and improve lung function over time. Regular use can reduce the frequency of COPD exacerbations, enhancing the quality of life for patients. It is usually part of a broader treatment plan that may include other medications and lifestyle changes.