Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2484878 | Journal of Pharmaceutical Sciences | 2012 | 10 Pages |
Abstract
Sufentanil (SUF) is a synthetic analgesic opioid widely used for the management of acute and chronic pain. This drug was complexed with 2âhydroxypropylâβâcyclodextrin (HPâβâCD) and the physicochemical characterization, in vitro/ex vivo toxicity assays, and pharmacological evaluation were performed. Differential scanning calorimetry, Fourier transform infrared spectroscopy (FTIR) analysis, and Xâray powder diffraction showed the formation and the morphology of the complex. Nuclear magnetic resonance afforded data regarding inclusion complex stoichiometry (1:1) with an association binding constant (Ka) value of 515.2 ± 1.2âMâ1 between SUF and HPâβâCD. Complexation with HPâβâCD protected SUF from light exposure and increased its photostability. Release kinetics revealed a decrease in SUF release rate (Krel = 7.05 ± 0.52 and 5.61 ± 0.39âminâ1/2 for SUF-HPâβâCD and SUF, respectively) and reduced hemolytic or myotoxic effects after complexation. Time course of tailâflick test showed that the duration of analgesia induced by SUF (150.0 ± 34.6âmin) was significantly increased (p < 0.001) after complexation with HPâβâCD (355.7 ± 47.2âmin) when injected at the same dose (1âμg kgâ1), prolonging the duration of analgesia after intramuscular administration and representing an alternative on the development of effective and safe drugâdelivery system for opioid analgesics.
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Authors
Cristiane Volobuef, Carolina M. Moraes, Lázaro A. S. Nunes, CÃntia M. S. Cereda, Fabiano Yokaichiya, Margareth K. K. D. Franco, Angélica F.A. Braga, Eneida De Paula, Giovana Radomille Tófoli, Leonardo F. Fraceto, Daniele R. De Araujo,