<unk>  is a antihistamine that is FDA approved for the treatment of allergic rhinitis, urticaria and angioedema.   Common adverse reactions include drowsiness, urinary retention.
Clemastine
Azelastine 
Bepotastine Besilate
Pemirolast
Acrivastine
Levocabastine
Epinastine hydrochloride
Buflomedil