Release and Permeation of Transdermal Products
In vitro release and permeation of transdermal products: a methodological study of experimental apparatus and conditions
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Transdermal drug release has several therapeutic advantages over oral or parenteral administration. To date, there is no method in the Brazilian Pharmacopoeia for testing the release of drugs from transdermal patches. Other official compendia, such as the American, British and European Pharmacopoeia, describe the apparatus of paddles on a disk, the rotating cylinder and the reciprocal support. The literature currently describes various types of diffusion cells for transdermal release, of which the Franz diffusion cell has been the most widely used. The aim of this study was to establish criter...
Transdermal drug release has several therapeutic advantages over oral or parenteral administration. To date, there is no method in the Brazilian Pharmacopoeia for testing the release of drugs from transdermal patches. Other official compendia, such as the American, British and European Pharmacopoeia, describe the apparatus of paddles on a disk, the rotating cylinder and the reciprocal support. The literature currently describes various types of diffusion cells for transdermal release, of which the Franz diffusion cell has been the most widely used. The aim of this study was to establish criteria for the most appropriate choice of equipment and "in vitro" methodologies for evaluating the transdermal release of drugs. The results of this research are an important tool for discussions on Pharmaceutical Equivalence and Quality Control testing of transdermal drugs, as well as understanding possible process errors. It could also provide data for protocol indications for the Brazilian Pharmacopoeia and scientific research into drug delivery systems.
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