<unk>  is an anticholinergic that is FDA approved for the treatment of bronchospasm associated with chronic obstructive pulmonary disease (COPD), including chronic bronchitis and emphysema.   Common adverse reactions include headache, nasopharyngitis and cough.
Aclidinium bromide
Tiratricol
Ethenzamide
Umeclidinium
Brinzolamide
Niceritrol
Etretinate
Pirisudanol