Additive intraocular pressure lowering effect of various medications with latanoprost.

PURPOSE: To determine the additive intraocular pressure reduction of various topical glaucoma agents used adjunctively with latanoprost.

DESIGN

Retrospective interventional case series.

METHODS

Retrospective evaluation of 73 eyes of 73 patients with glaucoma and inadequate intraocular pressure control on latanoprost alone. Each patient received adjunctive treatment with an additional glaucoma agent (dorzolamide, brimonidine, timolol, or other beta-blockers) for 1 year.

RESULTS

When added to latanoprost, dorzolamide lowered intraocular pressure an additional 3.9 mm Hg (19.7%, P <.001); beta-blockers further reduced intraocular pressure by 2.0 mm Hg (12.3%, P <.001), and brimonidine further reduced intraocular pressure by 2.0 mm Hg (9.3%, P =.0011). Dorzolamide dosed twice or three times daily was as effective as adjunctive therapy with latanoprost (P =.92).

CONCLUSION

Adjunctive therapy with dorzolamide provided a statistically significant intraocular pressure reduction at 1 year in eyes that were inadequately controlled with latanoprost alone.