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1 General aspects (0)   1.1 Epidemiology (9)   1.2 Population genetics (1)   1.3 Pathogenesis (0)   1.4 Quality of life (11)   1.5 Glaucomas as cause of blindness (11)   1.6 Prevention and screening (13) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (2)   2.2 Cornea (14)   2.3 Sclera (8)   2.4 Anterior chamber angle (3)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (6)     2.5.2 Schlemms canal (3)     2.5.3 Scleral outlet channels (1)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (0)     2.6.2 Outflow (1)       2.6.2.1 Trabecular meshwork (3)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (1)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (6)   2.9 Ciliary body (0)   2.10 Lens (0)   2.11 Vitreous body (1)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (2)   2.13 Retina and retinal nerve fibre layer (21)   2.14 Optic disc (20)   2.15 Optic nerve (4)   2.16 Chiasma and retrochiasmal central nervous system (4)   2.17 Stem cells (3)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (0)   3.2 Electron microscopy (1)   3.3 Immunohistochemistry (0)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (1)     3.4.2 Gene studies (14)   3.5 Molecular biology incl. 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Miscellaneous (27)

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Abstract #65900 Published in IGR 17-3

Variation in Number of Doses, Bottle Volume, and Calculated Yearly Cost of Generic and Branded Latanoprost for Glaucoma

Queen JH; Feldman RM; Lee DA
American Journal of Ophthalmology 2016; 163: 70-74.e1

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PURPOSE: To evaluate discrepancies in doses per bottle, bottle fill volume, and cost among branded and generic formulations of latanoprost. DESIGN: Comparative economic analysis. METHODS: This study was conducted at the Ruiz Department of Ophthalmology and Visual Science at The University of Texas Health Science Center at Houston (UTHealth). Four regionally available latanoprost formulations were measured. Number of drops per bottle and actual bottle fill volume were measured for a calculated sample size (10 bottles). Annual cost (using average wholesale price), days use per bottle, drops per milliliter, and number of bottles used per year were calculated. Data were summarized using mean and standard deviation; 1-way analysis of variance and post hoc Tukey's studentized range test were used for comparing means among manufacturers. RESULTS: Pfizer's branded lantanoprost, Xalatan (New York, New York, USA), had the largest fill volume (P < .001). Pfizer had the highest yearly cost at $1198 (P < .001), whereas Akorn (Lake Forest, Illinois, USA) and Bausch & Lomb (Rochester, New York, USA) had the lowest ($184 and $201, respectively). Pfizer and Bausch & Lomb had the most drops per bottle (87.3 and 88.7, respectively), which was statistically more (P < .001) than either Akorn or Sandoz (Princeton, New Jersey, USA) (77.6 and 76.6, respectively), but there was no statistical difference among the standard deviation of drops per bottle (Levene 0.14). CONCLUSIONS: Annual cost and number of doses per bottle, factors important to patients, vary significantly depending on the manufacturer of latanoprost. Practitioners can better advise patients by being aware of these differences.

Ruiz Department of Ophthalmology and Visual Science, The University of Texas Health Science Center at Houston (UTHealth) McGovern Medical School, Houston, Texas; Robert Cizik Eye Clinic, Houston, Texas.

Full article

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Classification:

14 Costing studies; pharmacoeconomics
11.4 Prostaglandins (Part of: 11 Medical treatment)

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