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Comparison of the 24-hour intraocular pressure-lowering effects of latanoprost and dorzolamide/timolol fixed combination after 2 and 6 months of treatment.

Author(s): Konstas AG, Kozobolis VP, Tsironi S, Makridaki I, Efremova R, Stewart WC

Affiliation(s): Glaucoma Unit, First University Department of Ophthalmology, AHEPA Hospital, Thessaloniki, Greece.

Publication date & source: 2008-01, Ophthalmology., 115(1):99-103.

Publication type: Comparative Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't

PURPOSE: To evaluate the 24-hour intraocular pressure (IOP)-lowering effect of latanoprost and the dorzolamide/timolol fixed combination (DTFC) after 2 and 6 months of treatment. DESIGN: Randomized, prospective, crossover comparison. PARTICIPANTS: Thirty-nine patients had primary open-angle glaucoma, and 14 patients had ocular hypertension. METHODS: After a 6-week washout period, patients were randomized to either 6 months of treatment with the DTFC twice daily or latanoprost every evening and then crossed over to the opposite treatment for an additional 6 months. MAIN OUTCOME MEASURE: Mean 24-hour IOP after 2 and 6 months of treatment. RESULTS: Fifty-three patients had an average 24-hour baseline IOP of 25.2+/-2.3 mmHg. After 6 months of treatment, 24-hour IOPs were 18.1+/-1.9 mmHg for the DTFC and 18.3+/-1.9 mmHg for latanoprost. Compared with 2 months of therapy, at 6 months the DTFC showed no significant change in mean 24-hour IOP, whereas latanoprost demonstrated a reduction of 0.3 mmHg (P = 0.01). The DTFC had more burning (P<0.001) and bitter taste (P = 0.01), whereas the latanoprost had more hypertrichosis (P = 0.02). CONCLUSIONS: After 6 months of therapy, the DTFC and latanoprost have clinically similar 24-hour IOP-lowering efficacies.

Page last updated: 2008-03-26

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