Comparison of the effects of ketotifen fumarate 0.025% and olopatadine HCl 0.1% ophthalmic solutions in seasonal allergic conjunctivities: A 30-day, randomized, double-masked, artificial tear substitute-controlled trial

Background: Topical antiallergic agents, such as antihistamines and mast-cell stabilizers, are the main therapeutic options for seasonal allergic conjunctivitis (SAC). Ketotifen fumarate and olopatadine HCl have dual action that offers a combination of these 2 mechanisms. Although clinical studies comparing the efficacy of these 2 drugs have shown that both were effective in the treatment of SAC, the results were contradictory and did not...