Aclidinium is an anticholinergic agent indicated for the long-term management of chronic obstructive pulmonary disease (COPD). The drug works by virtue of a higher propensity to bind to muscarinic receptors than to nicotinic receptors. However, when using Aclidinium, there may be some side effects related to breathing problems. Therefore, before using the drug, the patient should carefully study the information of the drug and consult the treating doctor.