<unk>  is a antihistamine that is FDA approved for the treatment of Perennial and seasonal allergic rhinitis, Vasomotor rhinitis, Allergic conjunctivitis, Mild, uncomplicated allergic skin manifestations of urticaria and angioedema, Amelioration of allergic reactions to blood or plasma, Dermographism..   Common adverse reactions include Diarrhea, Epigastric discomfort, Nausea, Vomiting, Xerostomia, Somnolence ,Nasal mucosa dry.
Dexchlorpheniramine
Dexbrompheniramine
Brompheniramine
Clonidine
Chlorbenzoxamine
Mephentermine
Levophenacylmorphan
Chlorphenamine