Development of a Discriminative In Vitro Release Test for Rivastigmine Transdermal Patches Using Pharmacopeial Apparatuses: USP 5 and USP 6


The aim of this study was to develop and validate a discriminating in vitro release test to evaluate rivastigmine transdermal patches. The Exelon® Patch was chosen as a model transdermal product. The studies of in vitro release were designed to determine the impact of the official apparatus chosen (USP apparatus 5 and USP apparatus 6), the rotation speed, and the dissolution medium characteristics on the rivastigmine release profile from transdermal patches. Patches with different drug release profiles were tested in order to evaluate the discriminating power of the in vitro release test developed and validated. Variables such as the apparatus type, the dissolution medium, and the rotation speed have a significant influence on the drug release characteristics from a transdermal patch. The in vitro release methodologies using the USP apparatus 5 at 50 rpm and USP apparatus 6 at 25 rpm using the medium phosphate-buffered saline pH 7.4 were considered discriminative and adequate to characterize the rivastigmine (RV) release from a commercial transdermal patch, Exelon® Patch.

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A. Simon thanks CAPES for the support to publish this article under Grant No. 3372/13-8. This material is based upon works supported by the CAPES (Brasília, Brazil), FAPERJ (Rio de Janeiro, Brazil), and the Science Foundation Ireland under Grant No. 12/RC/2275.

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Correspondence to Valeria Pereira de Sousa.

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Simon, A., Amaro, M.I., Healy, A.M. et al. Development of a Discriminative In Vitro Release Test for Rivastigmine Transdermal Patches Using Pharmacopeial Apparatuses: USP 5 and USP 6. AAPS PharmSciTech 18, 2561–2569 (2017).

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  • dissolution test
  • Franz diffusion cell
  • patch
  • pharmacopeial apparatus
  • rivastigmine