A study of the safety and efficacy of travoprost 0.004%/timolol 0.5% ophthalmic solution compared to latanoprost 0.005% and timolol 0.5% dosed concomitantly in patients with open-angle glaucoma or ocular hypertension

Original Research

(2291) Views  (629) Full article downloads

Authors: Douglas J Rhee, James H Peace, Sushanta Mallick, Theresa A Landry, Michael VW Bergamini, and the Study Group*

Published Date June 2008 Volume 2008:2(2) Pages 313 - 319

DOI: http://dx.doi.org/10.2147/OPTH.S2830

Douglas J Rhee¹, James H Peace², Sushanta Mallick³, Theresa A Landry³, Michael VW Bergamini³, and the Study Group*

¹Massachusetts Eye and Ear Infirmary, Harvard University, Boston, MA, USA; ²Diabetic Eye Medical Clinic, Inglewood, CA, USA; ³Alcon Laboratories, Inc., Ft. Worth, TX, USA; *Study Group members listed in Appendix

Background/Aims: To compare the intraocular pressure (IOP)-lowering efficacy of travoprost 0.004%/timolol 0.5% in fixed combination with the unfixed combination of latanoprost 0.005% and timolol 0.5% in open-angle glaucoma or ocular hypertension patients with IOP levels below 18 mmHg on the unfixed combination of latanoprost 0.005% and timolol 0.5%.

Methods: Following a 30-day open-label run-in with latanoprost QD PM and timolol QD AM, subjects with intraocular pressure below 18 mmHg were randomized to continue concomitant latanoprost QD PM and timolol QD AM or switch to travoprost 0.004%/timolol 0.5% QD AM and vehicle QD PM in masked fashion and were followed for 3 months. The primary efficacy endpoint was mean IOP reduction from baseline.

Results: There were no clinically relevant or statistically significant differences in mean IOP, mean IOP change from baseline, or percentage IOP change from baseline between the two treatment groups. Between-group differences in mean IOP were within ±0.3 mmHg at all time points (p ≥ 0.384), and between-group differences in mean IOP change from baseline were within ±0.4 mmHg at all time points. Overall, 88% of patients whose IOP was less than 18 mmHg on the unfixed combination of latanoprost and timolol remained well controlled on the same regimen in the masked portion of the study, compared with 92% who remained well controlled after switching to travoprost/timolol.

Conclusion: Travoprost 0.004%/timolol 0.5% administered once daily and concomitant administration of timolol 0.5% and latanoprost 0.005% produce similar maintenance of IOP-lowering effect in patients who were previously well controlled on concomitant administration of latanoprost and timolol. Patients who are well controlled on latanoprost and timolol concomitant therapy can be switched to once-daily therapy with travoprost 0.004%/timolol 0.5% with no expected compromise in the safety and efficacy of their treatment.

Keywords: travoprost, timolol, glaucoma, intraocular pressure, fixed combination