<unk>  is a respiratory agent that is FDA approved for the treatment of airflow obstruction in patients with chronic obstructive pulmonary disease (COPD), including chronic bronchitis and/or emphysema.   Common adverse reactions include nasopharyngitis, upper respiratory infection.
Umeclidinium
Metizoline
Aclidinium bromide
Molsidomine
Aclidinium
Linsidomine
Avacopan
Fazadinium bromide