While some studies show that Patanol (olopatadine) is more effective at treating eye allergies than ketotifen, other studies show that many of the other antihistamine/mast cell stabilizer eye drops used to treat itchy eyes all work about the same, and are better at treating eye allergies when compared to many other over-the-counter eye drops, including Visine. Side effects of ketotifen are mild and may include eye irritation, sore throat, headache and a runny nose.
Learn more about the treatment of itchy eyes associated with eye allergy.
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Figus M, Fogagnolo P, Lazzeri S, et al. Treatment of Allergic Conjunctivitis: Results of a 1-Month, Single-Masked Randomized Study. Eur J Ophthalmol. 2010 Sep-Oct;20(5):811-8.
Varguez-Rodríguez ME, Hernández-López A, Gómez-Dávila Rde L. Comparison of Olopatadine and Ketotifen in the Treatment of Allergic Conjunctivitis. Rev Med Inst Mex Seguro Soc. 2009 Jul-Aug;47(4):399-404.
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