Abstract
In this work the possibility of impregnating P(MMA-EHA-EGDMA) with flurbiprofen using a clean and environmentally friendly technology, namely supercritical fluid technology was evaluated. P(MMA-EHA-EGDMA) has been proposed as a promising matrix to be used for intraocular delivery of anti-inflammatory drugs used in eye surgery and flurbiprofen is a non-steroidal antiinflammatory agent. Fundamental studies like, the solubility of the drug in carbon dioxide, as well as the sorption degree of this polymeric matrix in the presence of carbon dioxide have been previously carried out. The aim of this research was to evaluate the effects of these two variables in the impregnation process. Different experimental conditions were tested and the results obtained suggest that the best impregnating conditions for this system are low temperatures and pressures, which at the same time correspond to a lower solubility of the drug in the supercritical fluid and a low swelling of the polymeric matrix. Experiments performed also indicate that the batch impregnation process leads to higher yields of impregnation and according to the release profiles obtained the drug can be released from the matrix up to three months, which presents great advantages for post-surgical treatments.
Keywords: Ophthalmic drug delivery, supercritical fluids, impregnation, anti-inflammatory agents, biocompatible polymers
Current Drug Delivery
Title: Impregnation of an Intraocular Lens for Ophthalmic Drug Delivery
Volume: 5 Issue: 2
Author(s): Ana Rita C. Duarte, Ana Luisa Simplicio, Arlette Vega-Gonzalez, Pascale Subra-Paternault, Patricia Coimbra, M. H. Gil, Herminio C. de Sousa and Catarina M.M. Duarte
Affiliation:
Keywords: Ophthalmic drug delivery, supercritical fluids, impregnation, anti-inflammatory agents, biocompatible polymers
Abstract: In this work the possibility of impregnating P(MMA-EHA-EGDMA) with flurbiprofen using a clean and environmentally friendly technology, namely supercritical fluid technology was evaluated. P(MMA-EHA-EGDMA) has been proposed as a promising matrix to be used for intraocular delivery of anti-inflammatory drugs used in eye surgery and flurbiprofen is a non-steroidal antiinflammatory agent. Fundamental studies like, the solubility of the drug in carbon dioxide, as well as the sorption degree of this polymeric matrix in the presence of carbon dioxide have been previously carried out. The aim of this research was to evaluate the effects of these two variables in the impregnation process. Different experimental conditions were tested and the results obtained suggest that the best impregnating conditions for this system are low temperatures and pressures, which at the same time correspond to a lower solubility of the drug in the supercritical fluid and a low swelling of the polymeric matrix. Experiments performed also indicate that the batch impregnation process leads to higher yields of impregnation and according to the release profiles obtained the drug can be released from the matrix up to three months, which presents great advantages for post-surgical treatments.
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Duarte C. Ana Rita, Simplicio Luisa Ana, Vega-Gonzalez Arlette, Subra-Paternault Pascale, Coimbra Patricia, Gil H. M., de Sousa C. Herminio and Duarte M.M. Catarina, Impregnation of an Intraocular Lens for Ophthalmic Drug Delivery, Current Drug Delivery 2008; 5 (2) . https://dx.doi.org/10.2174/156720108783954851
DOI https://dx.doi.org/10.2174/156720108783954851 |
Print ISSN 1567-2018 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5704 |
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