The Control of Skin-Permeating Rate of Bisoprolol by Ion-Pair Strategy for Long-Acting Transdermal Patches
- 26 May 2012
- journal article
- Published by Springer Science and Business Media LLC in AAPS PharmSciTech
- Vol. 13 (3), 811-815
- https://doi.org/10.1208/s12249-012-9808-1
Abstract
A moderate drug permeating rate (flux) is desirable for long-acting transdermal patches. In this work, a novel simple method of controlling bisoprolol (BSP) flux by ion-pair strategy was initiated. Different ion-pair complexes including bisoprolol maleate (BSP-M), bisoprolol tartarate, bisoprolol besilate, and bisoprolol fumarate were prepared and their fluxes through rabbit abdominal skin were determined separately in vitro. Furthermore, permeation behavior from isopropyl myristate, solubility index in pressure-sensitive adhesives, determined by DSC, and n-octanol/water partition coefficient (log P) were investigated to illustrate the mechanism of drug permeation rate controlling. The results showed that compared to free BSP (J = 25.98 ± 2.34 μg/cm2/h), all BSP ion-pair complexes displayed lower and controllable flux in the range of 0.11 to 4.19 μg/cm2/h. After forming ion-pair complexes, the capability of BSP to penetrate through skin was weakened due to the lowered log P and increased molecule weight. Accordingly, this study has demonstrated that the flux of BSP could be controlled by ion-pair strategy, and among all complexes investigated, BSP-M was the most promising candidate for long-acting transdermal patches.Keywords
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