Pes6 Cost Effectiveness of Latanoprost in First Line Treatment of Primary Open Angle Glaucoma in the Uk
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Bimatoprost (Lumigan) is a prostamide analogue used for the reduction of elevated intraocular pressure (IOP) in patients with open-angle glaucoma or ocular hypertension. In comparative clinical trials of up to 1 year in duration, administration of 0.03% bimatoprost ophthalmic solution once daily was more effective than 0.5% timolol twice daily and at least as effective as the prostaglandin analogues 0.005% latanoprost and 0.004% travoprost once daily in terms of reducing IOP and/or achieving target IOP levels. Bimatoprost was also more effective than twice-daily administration of 0.5%/2% timolol/dorzolamide in patients refractory to topical timolol therapy. Although generally well tolerated, bimatoprost is associated with a higher incidence of conjunctival hyperaemia than latanoprost, timolol or the combination of timolol and dorzolamide. Three fully published modelled cost-effectiveness analyses of bimatoprost evaluating cost per treatment success in patients with glaucoma or ocular hypertension have been conducted in the US. The analyses incorporated results of randomised, multicentre clinical trials and used a 1-year time horizon. In the treatment algorithm used in the models, patients not achieving target IOP levels with bimatoprost or comparator required additional medical visits and adjunctive therapy. Bimatoprost was associated with lower costs per treatment success than latanoprost, timolol or timolol/dorzolamide across a range of clinically relevant target IOPs. Results were sensitive to changes in treatment success rates and/or drug acquisition costs. Along with the inherent limitations of economic models, other possible criticisms of the analyses are the use of selected IOP data, and the lack of inclusion of costs associated with conjunctival hyperaemia or other adverse effects of therapy. Various other cost-effectiveness analyses of bimatoprost are available, primarily as abstracts and/or posters. In general, most of these studies have also been favourable for bimatoprost, despite having been conducted in different countries and/or from different perspectives. In conclusion, in patients with open-angle glaucoma or ocular hypertension, bimatoprost is an effective and generally well tolerated therapeutic option, albeit with a relatively high incidence of conjunctival hyperaemia. Although results of modelled cost-effectiveness analyses should be interpreted with due consideration of the limitations of the studies, available pharmacoeconomic data generally support the use of bimatoprost as a cost-effective treatment in this patient population.
Bimatoprost (Lumigan) is a prostamide analogue used for the reduction of elevated intraocular pressure (IOP) in patients with open-angle glaucoma or ocular hypertension. In comparative clinical trials of up to 1 year in duration, administration of 0.03% bimatoprost ophthalmic solution once daily was more effective than 0.5% timolol twice daily and at least as effective as the prostaglandin analogues 0.005% latanoprost and 0.004% travoprost once daily in terms of reducing IOP and/or achieving target IOP levels. Bimatoprost was also more effective than twice-daily administration of 0.5%/2% timolol/dorzolamide in patients refractory to topical timolol therapy. Although generally well tolerated, bimatoprost is associated with a higher incidence of conjunctival hyperaemia than latanoprost, timolol or the combination of timolol and dorzolamide. Three fully published modelled cost-effectiveness analyses of bimatoprost evaluating cost per treatment success in patients with glaucoma or ocular hypertension have been conducted in the US. The analyses incorporated results of randomised, multicentre clinical trials and used a 1-year time horizon. In the treatment algorithm used in the models, patients not achieving target IOP levels with bimatoprost or comparator required additional medical visits and adjunctive therapy. Bimatoprost was associated with lower costs per treatment success than latanoprost, timolol or timolol/dorzolamide across a range of clinically relevant target IOPs. Results were sensitive to changes in treatment success rates and/or drug acquisition costs. Along with the inherent limitations of economic models, other possible criticisms of the analyses are the use of selected IOP data, and the lack of inclusion of costs associated with conjunctival hyperaemia or other adverse effects of therapy. Various other cost-effectiveness analyses of bimatoprost are available, primarily as abstracts and/or posters. In general, most of these studies have also been favourable for bimatoprost, despite having been conducted in different countries and/or from different perspectives. In conclusion, in patients with open-angle glaucoma or ocular hypertension, bimatoprost is an effective and generally well tolerated therapeutic option, albeit with a relatively high incidence of conjunctival hyperaemia. Although results of modelled cost-effectiveness analyses should be interpreted with due consideration of the limitations of the studies, available pharmacoeconomic data generally support the use of bimatoprost as a cost-effective treatment in this patient population.
We conducted a systematic review of economic studies of prostaglandin analogues for the treatment of glaucoma to assess the scope of current cost-effectiveness evidence and its relevance to decision-makers. The literature search retrieved 102 studies published before July 2005; after additional hand searching of conference proceedings, 13 full-text articles and 13 abstracts met the inclusion criteria. The reviewers extracted the key characteristics of each of the economic evaluations, and all studies received a grade in five categories to summarise the quality of the study: methodology, transparency, sensitivity, relevance and overall score. The current economic literature is predominantly focused on identifying the short-term direct cost of glaucoma treatment, particularly the precise quantification of glaucoma drug costs. Using the European and US treatment guidelines as a benchmark, it is evident that the current body of literature does not satisfy the needs of decision-makers, although certain studies provide some valuable information, which is a step towards reaching this goal. The main methodological issue in the economic models is an absence of a clinically relevant long-term effectiveness measure, or where this measure is produced, there is a lack of transparency and validation of the methods used. More attention needs to be given to modelling the consequences of treatment, and those consequences should include patient compliance, control of intraocular pressure and progression of visual field deficit, since these drive both the costs and the overall outcomes. We recognise that constructing the 'ideal' clinical outcome measure represents a major challenge to researchers. As such, we have outlined a modelling framework that could be used to produce the required level of economic evidence, and ongoing clinical research (such as the Early Manifest Glaucoma Trial) could provide the validated link between intraocular pressure and disease progression, which forms an essential part of such models.
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