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  • Title: Long-term effect of BAK-free travoprost on ocular surface and intraocular pressure in glaucoma patients after transition from latanoprost.
    Author: Aihara M, Otani S, Kozaki J, Unoki K, Takeuchi M, Minami K, Miyata K.
    Journal: J Glaucoma; 2012 Jan; 21(1):60-4. PubMed ID: 21278589.
    Abstract:
    PURPOSE: To assess the efficacy and tolerability of benzalkonium chloride (BAK)-free travoprost after transition from BAK-preserved latanoprost. METHODS: This was a prospective, open-label, multicenter study in patients with open-angle glaucoma or ocular hypertension who had been treated with latanoprost monotherapy for at least 3 months. The main outcome measures were superficial punctate keratopathy (SPK), hyperemia, and intraocular pressure (IOP). At baseline, 1, 3, and 12 months, hyperemia, SPK, and IOP were consecutively assessed. Hyperemia was assessed using a 4-grade scale. SPK was assessed by fluorescence staining observed by Area-Density classification. The IOP was measured by Goldmann applanation tonometry. RESULTS: One hundred and fourteen patients participated in this study. Twenty-eight patients discontinued medications by 1 month. Sixty-seven patients completed the study. Transition from latanoprost to BAK-free travoprost showed no significant effect on hyperemia at 1 month, but showed significant decreases at 3 and 12 months compared with baseline (P<0.05). The prevalence of SPK, especially its severity score, at all points were significantly reduced compared with baseline (P<0.05). The IOP at baseline and at 12 months after transition was 14.9±3.4 and 14.3±3.3 mm Hg, indicating a significant reduction after the change in regimen compared with baseline (P<0.05). CONCLUSIONS: Treatment for 12 months with BAK-free travoprost after BAK-preserved latanoprost resulted in fewer ocular surface complications, as indicated by the reduced prevalence of SPK and decreased hyperemia, and no clinically relevant changes in IOP. BAK-free travoprost may have beneficial effects on the ocular surface while showing IOP-lowering efficacy comparable with BAK-preserved eye drops.
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