<unk>  is an anti-allergic agent that is FDA approved for the treatment of allergic rhinitis and common cold.   Common adverse reactions include diarrhea, nausea, vomiting, and somnolence.
Chlorphenamine
Methoxyphenamine
Methenamine
Chlorbenzoxamine
Dexchlorpheniramine
Nicergoline
Cibenzoline
Chlorphenoxamine