Abstract
Objective: To compare the efficacy, tolerability and local tolerance of diclofenac sodium 0.1% containing hydroxypropylgamma cyclodextrin preserved with benzalkonium chloride 0.005% (Voltaren® Ophtha CD),1 with that of diclofenac sodium 0.1% preserved with thiomersal 0.004% (Voltaren® Ophtha) in the treatment of inflammation after cataract-intraocular lens surgery.
Design and setting: Randomised 2 : 1, double-masked, parallel-group study in six centres in Germany.
Study participants: 299 patients scheduled to undergo phacoemulsification with posterior chamber intraocular lens implantation.
Interventions: Study medications were instilled four times in the 30 minutes before surgery and four times daily from the first postoperative day. Main outcomemeasures: The key efficacy variable was the reduction in anterior chamber flare (photons/millisecond) from day 1 to day 6 to 8. Patients underwent comprehensive ocular examinations, including laser flaremetry (KOWA), preoperatively and postoperatively at days 1, 6 to 8 and 24 to 32.
Results: 268 patients (Voltaren® Ophtha CD 177, Voltaren® Ophtha 91) completed the day 6 to 8 visit without any protocol violations. Reduction in the degree of intraocular inflammation with Voltaren® Ophtha CD was equivalent to that achieved with Voltaren® Ophtha at the day 6 to 8 [95% confidence interval (CI) −3.07 to +0.54] and day 24 to 32 (95% CI −1.44 to +1.40) visits. Although there was no significant (p = 0.464) difference between the two study groups in patients’ global assessment of local tolerance at day 24 to 32, ocular discomfort was significantly (p = 0.023) less with Voltaren® Ophtha CD compared with Voltaren® Ophtha.
Conclusions: Voltaren® Ophtha CD was as effective and well tolerated but had less ocular discomfort compared with Voltaren® Ophtha in the treatment of ocular inflammation after phacoemulsification with intraocular lens implantation. This new formulation of diclofenac sodium 0.1% may be used as an alternative to the existing formulations of ophthalmic diclofenac sodium 0.1%.
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Acknowledgements
This study was supported in part by a grant from Novartis Ophthalmics AG, Buelach, Switzerland.
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Appendix
Appendix
Clinical Grades of Visual Acuity, Ocular Discomfort, Conjunctival Hyperaemia, and Anterior Chamber Flare and Cells
Visual acuity (measured with a pinhole and a Snellen chart at 6 meters under standard lighting conditions)
-
0:
<0.1
-
1:
0.1–0.2
-
2:
0.3–0.4
-
3:
0.5–0.7
-
4:
>0.7
Ocular discomfort (includes superficial pain in particular but also foreign body/gritty sensation, itching, burning and other forms of nonspecific discomfort; grade 4 was to be recorded as an adverse event)
-
0:
absent
-
1:
mild (present but not interfering with daily life)
-
2:
moderate (distressing but not interfering with daily life)
-
3:
severe (very distressing and interfering with daily life but can continue in the study)
-
4:
intolerable (very distressing and interfering with daily life and cannot continue in the study)
Conjunctival hyperaemia
-
0:
absent
-
1:
pale reddish colour of bulbar conjunctiva involving fine conjunctival vessels
-
2:
red colour of bulbar conjunctiva involving fine conunctival and episcleral vessels
-
3:
bright red colour of bulbar conjunctiva involving conjunctival and episcleral vessels
-
4:
bulbar conjunctival injection involving conjunctival and episcleral vessels, and/or definite chemosis of bulbar conjunctiva
All slit-lamp examinations were conducted under standard conditions: dim room illumination, maximal lamp voltage, smallest aperture (0.3mm on Zeiss and 0.2mm in Haag-Streit slit-lamp), illumination angle of 30 to 45°, magnification of 16× and observation for five seconds.
Anterior chamber flare
-
0:
absent
-
1:
trace (barely detectable)
-
2:
mild intensity (iris and lens details clear)
-
3:
moderate intensity (iris and lens details not clear)
-
4:
strong intensity (iris and lens details not visible at all, fibrin in the anterior chamber)
Anterior chamber cells
-
0:
none
-
1:
1 to 5 cells
-
2:
6 to 15 cells
-
3:
16 to 30 cells
-
4:
>30 cells
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Mester, U., Lohmann, C., Pleyer, U. et al. A Comparison of Two Different Formulations of Diclofenac Sodium 0.1% in the Treatment of Inflammation following Cataract-Intraocular Lens Surgery. Drugs R&D 3, 143–151 (2002). https://doi.org/10.2165/00126839-200203030-00001
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DOI: https://doi.org/10.2165/00126839-200203030-00001