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Prospective, non-interventional, multicenter study of the intraocular pressure-lowering effects of prostaglandin analog/prostamide-containing therapies in previously treated patients with open-angle glaucoma or ocular hypertension

Authors Tamçelik N, Izgi B, Temel A, Yildirim N, Okka M, Özcan A, Yüksel N, Elgin U, Altan C, Ozer B

Received 17 August 2016

Accepted for publication 28 January 2017

Published 19 April 2017 Volume 2017:11 Pages 723—731

DOI https://doi.org/10.2147/OPTH.S119963

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Amy Norman

Peer reviewer comments 5

Editor who approved publication: Dr Scott Fraser

Nevbahar Tamçelik,1 Belgin Izgi,2 Ahmet Temel,3 Nilgun Yildirim,4 Mehmet Okka,5 Altan Özcan,6 Nurşen Yüksel,7 Ufuk Elgin,8 Çiğdem Altan,9 Baris Ozer10

1Cerrahpaşa School of Medicine, Istanbul University, 2Çapa School of Medicine, Istanbul University, 3Pendik Research and Training Hospital, Marmara University, Istanbul, 4School of Medicine, Osmangazi University, Eskisehir, 5Meram School of Medicine, Necmettin Erbakan University, Konya, 6Faculty of Medicine, Çukurova University, Adana, 7Kocaeli University Medical Faculty, Kocaeli, 8Ulucanlar Eye Hospital, Ankara, 9Beyoglu Eye Training and Research Hospital, Istanbul, 10Allergan İIaçları Tic AŞ, Istanbul, Turkey

Objective: The objective of this study was to assess the intraocular pressure (IOP)-lowering efficacy, tolerability, safety, and usage patterns of prostaglandin analog/prostamide (PGA/P)-containing topical ocular hypotensives in ocular hypertension (OHT) and primary open-angle glaucoma in the Turkish clinical setting.
Methods: This non-interventional, multicenter study enrolled previously treated patients who failed to achieve target IOP (or experienced unacceptable adverse events [AEs]) and were prescribed a PGA/P-containing IOP-lowering agent. Treatment was initiated at baseline (V1), and patients returned at weeks 4–6 (V2) and 8–12 (V3). The primary efficacy measure was the change in IOP from baseline at V3 in each eye. The secondary measures were physician’s assessment of IOP-lowering efficacy, patients (%) reaching target IOP determined at V1, hyperemia score, physician and patient assessment of study treatment tolerability at V3, and AE frequency/severity. A subgroup analysis of patients receiving the most common study treatment was conducted. All analyses were performed using the safety population (patients who received one or more doses and had any data available).
Results: Of 358 enrolled patients, 60.6% had primary open-angle glaucoma, 29.9% had secondary open-angle glaucoma (protocol amendment), and 13.1% had OHT; 13 patients had multiple diagnoses. At V3, the mean IOP change from baseline was ≥-4.2 mmHg (≥21.1%). IOP met or was lower than the target in 81.7% of patients, 95% exhibited none to mild conjunctival hyperemia (most common AE), and tolerability was rated good/very good by >91.1% of patients and physicians. The results were similar in patients who received the most common study treatment, bimatoprost 0.03%/timolol 0.5% (bim/tim; n=310).
Conclusion: PGA/P-containing medications, including bim/tim, significantly reduced IOP in previously treated patients with open-angle glaucoma or OHT; most reached their target IOP or an IOP even lower than their target and reported good/very good tolerability. PGA/P-containing medications such as bim/tim should be considered as a safe, effective therapeutic option for Turkish patients who exhibit poor response, tolerance, or adherence to their previous therapy.

Keywords:
glaucoma, ocular hypertension, bimatoprost, timolol, prostaglandin analog, prostamide

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