<prompt> Mast cell stabilizer used in Bronchial Asthma isRaloxifeneKetotifenAzelastinBaclofen  <response>: Mast cells are impoant in initiating the acute bronchoconstrictor responses to allergens several other indirectly acting stimuli like exercise and hyperventillation.Ketotifen is a mast cell stabilizer which reduces the stimulation of mast cells and mediator release is reducedhistamine,PGD2,leukotrienes. Dose:1-2 mg BD;children 0.5 mg BD Reference:Harrison s medicine-18th edition,page no:2104;Textbook of pharmacology-K D Tripathi,7th edition,page no:229 