... most commonly sold in as a salt of fumaric Acid, ketotifen fumarate, and is available in two forms. In its ophthalmic ... Drops, and Claritin Eye. A generic version of Novartis' Zaditor, ketotifen fumarate ophthalmic solution, 0.025%, is available from Perrigo and distributed ... In South Korea 'Uniten-F Eye Drops (ketotifen fumarate 0.345mg/ml, 0.25mg as ketotifen)' which is a generic version of Zaditor ...