<unk>  is an anticholinergic that is FDA approved for the treatment of hay fever (allergic rhinitis) or upper respiratory allergies.   Common adverse reactions include hypersensitivity, drowsiness.
Brompheniramine
Dexchlorpheniramine
Dexbrompheniramine
Chlorbenzoxamine
Nicergoline
Cabergoline
Bupranolol
Clonidine