Patanol and Pataday for Eye Allergies

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Patanol and Pataday (olopatadine) are topical antihistamine eye drops used to treat itchy eyes associated with allergic conjunctivitis.

These eye drops work in two ways to treat eye allergies –- they block the effects of histamine and prevent the further release of allergic chemicals from mast cells. Although Patanol and Pataday use the same chemical, olopatadine, Pataday has twice the concentration of olopatadine than Patanol.

The usual dose of Pataday is one drop in each eye once daily for adults and children 2 years of age and older, and the dose of Patanol is one drop in each eye twice daily for adults and children 2 years of age and older.

A number of studies show that olopatadine is a superior allergy eye drop compared to similar medications, including Optivar (azelastine), Zaditor (ketotifen), and Elestat (epinastine). Pataday is also the only allergy eye drop indicated for once-daily use, which offers a convenient dosing regimen to people with eye allergies.

Side effects of olopatadine are mild, with 5-10% of people reporting various symptoms such as sore throat, blurred vision, eye irritation, eyelid swelling, back pain, cold and flu symptoms, headache, increased cough, nausea, nasal allergies, sinusitis and abnormal taste.

Learn more about the treatment of itchy eyes associated with eye allergy.


del Cuvillo A, Sastre J, Montoro J, et al. Allergic Conjunctivitis and H1 Antihistamines. J Investig Allergol Clin Immunol. 2009;19:S11-18.

Pataday Package Insert. Alcon Pharmaceuticals. 

Patanol Package Insert. Alcon Pharmaceuticals. 

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