<unk>  (INN) is a mast cell stabilizer used as an anti-allergic drug therapy. It is marketed under the tradenames Alegysal and Alamast.
It has also been studied for the treatment of asthma.
Pemirolast
Azelastine 
Clemastine
Buflomedil
Mizolastine
Seratrodast
Acrivastine
Bepotastine Besilate