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  • Title: A forced choice comfort study of olopatadine hydrochloride 0.1% versus ketotifen fumarate 0.05%.
    Author: Artal MN, Luna JD, Discepola M.
    Journal: Acta Ophthalmol Scand Suppl; 2000; (230):64-5. PubMed ID: 11057355.
    Abstract:
    PURPOSE: To compare the ocular comfort of two ophthalmic anti-allergic agents: olopatadine hydrochloride 0.1% and ketotifen fumarate 0.05%. SUBJECTS AND METHODS: In a double-masked, multi-centered, randomized trial, 80 subjects were asked to make a 'forced choice' based on ocular comfort between one drop of olopatadine hydrochloride 0.1% instilled in one eye and one drop of ketotifen fumarate 0.05% instilled in the contralateral eye. At one site, the incidence of adverse reactions was also reported. RESULTS: All subjects (100%) selected olopatadine as the more comfortable formulation. One site (n = 35) reported a 49% incidence of moderate burning and a 49% incidence of mild burning after ketotifen instillation. One subject (2% of population) at this site experienced no ocular discomfort with ketotifen. There were no reports of discomfort associated with olopatadine instillation. CONCLUSION: Olopatadine is a more comfortable ophthalmic preparation than ketotifen.
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