Onset and duration of action of ketotifen 0.025% and emedastine 0.05% in seasonal allergic conjunctivitis : efficacy after repeated pollen challenges in the vienna challenge chamber.

Objective: To compare the efficacy, onset and duration of action, and the safety of ketotifen fumarate 0.025% ophthalmic solution and emedastine difumarate 0.05% ophthalmic solution in subjects with seasonal allergic conjunctivitis (SAC) induced by allergen exposure, using the Vienna Challenge Chamber model.