Ketotifen

Formula : C19-H19-N-O-S
CAS : 34580-13-7 

A cycloheptathiophene blocker of histamine H1 receptors and release of inflammatory mediators. It has been proposed for the treatment of asthma, rhinitis, skin allergies, and anaphylaxis.

Ketotifen fumarate

Formula : C19-H19-N-O-S.C4-H4-O4
CAS : 34580-14-8 

A cycloheptathiophene blocker of histamine H1 receptors and release of inflammatory mediators. It has been proposed for the treatment of asthma, rhinitis, skin allergies, and anaphylaxis.