Data di Pubblicazione:
2010
Citazione:
Effect of drug chirality on the skin permeability of ibuprofen / F. Cilurzo, E. Alberti, P. Minghetti, C.G.M. Gennari, A. Casiraghi, L. Montanari. - In: INTERNATIONAL JOURNAL OF PHARMACEUTICS. - ISSN 0378-5173. - 386:1-2(2010 Feb), pp. 71-76. [10.1016/j.ijpharm.2009.10.053]
Abstract:
The in vitro passive diffusion of S-ibuprofen (S-IB) and RS-ibuprofen (RS-IB) through human epidermis was determined to study the effects of drug chirality. S-IB has a lower melting point (Tm =54◦C) than RS-IB (Tm =77◦C) and, therefore, a greater solubility (S-IB: 127±1_g/mL; RS-IB: 81±1_g/mL). Supersaturated plasters were prepared by using a poly(dimethylsiloxane) adhesive and Eugragit® RL and propylene glycol as antinucleant agents. The in vitro skin permeation profiles were determined by Franz cells and human epidermis obtained from three different donors. The permeation profiles of S-IB from saturated solutionsresulted statistically higher than those of RS-IB (p < 0.002). When plasters were used, no differences were noticeable between the enantiomer and racemate (p > 0.17). The latter unexpected results could be explained considering that the RS-IB or S-IB in vitro release rate constants, determined using 3% w/w or 6% w/w loaded plasters, were not statistically different, suggesting that the drug diffusivity within the adhesive matrix represented the rate limiting step to the skin absorption.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
F. Cilurzo, E. Alberti, P. Minghetti, C.G.M. Gennari, A. Casiraghi, L. Montanari
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