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Abstract: Diquafosol

To investigate the dose-dependent efficacy and safety of diquafosol ophthalmic solution for the treatment of dry eye syndrome.
Randomized, double-masked, multicenter, parallel-group, placebo-controlled trial.
A total of 286 Japanese patients with dry eye who were prescribed topical diquafosol (1%, n = 96; 3%, n = 96) or placebo ophthalmic solution (n = 94).
After a washout period of 2 weeks, qualified subjects were randomized to receive a single drop of 1% or 3% diquafosol or placebo ophthalmic solutions 6 times per day for 6 weeks.
The primary outcome measure was fluorescein corneal staining score assessment. The secondary outcome measures were Rose Bengal corneal and conjunctival staining scores, tear break-up time (BUT), and subjective symptom assessment. Safety measures were clinical blood and urine examination and recording of adverse events.
Fluorescein corneal staining scores significantly improved with both 1% and 3% topical diquafosol compared with placebo at 4 weeks, respectively (P = 0.037, P = 0.002). There was a dose-dependent effect among the groups. Rose Bengal corneal and conjunctival staining scores also improved significantly with both 1% and 3% diquafosol compared with placebo (P = 0.007 and P = 0.004, respectively). Subjective dry eye symptom scores significantly improved with both diquafosol ophthalmic solutions (P ≤ 0.033), although there were no significant differences in BUT compared with placebo. No significant differences between the treatment groups were observed in relation to the occurrence of adverse events.
Both 1% and 3% diquafosol ophthalmic solutions are considered effective and safe for the treatment of dry eye syndrome.
Proprietary or commercial disclosure may be found after the references.

Ophthalmology. 2012 Jun 25. [Epub ahead of print]
Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.