Drop volume of artificial tear solutions: pharmacoeconomic study

  • Costa A
  • Gama R
  • Kitadai S
  • et al.
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Abstract

Objective: To determine the mean drop volume produced by artificial tear solutions in different inclination angles and to determine the mean cost of the treatment. Methods: The drop volume of 3 original bottles of the artificial tear solutions Artelac ® , Hylo Comod ® , Lacrima ® Plus, Systane ® UL, Lacrifilm ® , Hyabak ® , Lacribell ® , Ecofilm ® , Mirugell ® , Plenigell ® , Fresh Tears ® , Optive ® and Endura ® were determined at the inclination of 90 o and 45 o. The mean number of drops in each bottle was determined and a pharmacoeconomic evaluation of the drops was made. Results: The drop volume ranged from 32.2 to 64.0 µL at 45 o and from 29.1 to 65.1 µL at 90 o. The difference between drops in each inclination varied from 2 to 24%. The annual cost was from R$2,73 to R$130,73 according to the inclination of the bottle. The Maximum Duration of Treatment (MDT) was from 29.3 to 51.4 days at 45 o and from 28.8 to 48.4 days at 90 o , being the difference in MDT from 0.5 to 8 more or less days depending on each brand. Conclusion: None of the collyria studied presented ideal drops for human eyes, leading to a waste of the product and higher cost for the manufacturer and the consumer. We noted that there is a significant variation in the drop volume according to the inclination of the bottle, and that a variation of over 10% would bring financial impact for the patient. Optive ® e Endura ® à inclinação de 90 o e 45 o. Determinou-se o número médio de gotas em cada frasco e foi feita avaliação farmacoeconômica dos colírios. Resultados: O volume das gotas variou de 32,2 a 64,0 µL a 45 o e de 29,1 a 65,1 µL a 90 o. A diferença entre as gotas em cada inclinação foi de 2 a 24% e o custo anual dos colírios de acordo com a inclinação variou de R$2,73 a R$130,73. A Duração Máxima de Tratamento (DMT) foi de 29,3 a 51,4 dias na inclinação de 45 o , e de 28,8 a 48,4 dias a 90 o , sendo que a diferença na DMT foi de 0,5 até 8 dias a mais ou a menos, de acordo com a marca. Conclusão: Nenhum dos colírios estudados apresentou gotas ideais para o olho humano, levando a um desperdício do produto e maior custo para o fabricante e para o consumidor. Percebemos que existe uma variação significativa no volume da gota de acordo com a inclinação do frasco, e que uma variação maior do que 10% traria impactos financeiros para o paciente.

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Costa, A. X. da, Gama, R. M. da, Kitadai, S. P. S., Andrade, E. P. de, Ferro, G. B. R., & Gomes, J. Á. P. (2015). Drop volume of artificial tear solutions: pharmacoeconomic study. Revista Brasileira de Oftalmologia, 74(6), 339–344. https://doi.org/10.5935/0034-7280.20150071

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