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KMID : 0369820100400010009
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Jorunal of Korean Pharmaceutical Sciences
2010 Volume.40 No. 1 p.9 ~ p.14
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Physical Properties of Gelucire-based Solid Dispersions Containing Lacidipine and Release Profiles
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Park Jun-Bom
Choi Jong-Seo
Lee Seung-Shul
Lee Ho
Lee Beom-Jin
Kang Chin-Yang
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Abstract
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Lacidipine used for the treatment of hypertension has low water solubility and is classified as BCS Class II category. Gelucire-based solid dispersions (SD) containing lacidipine were prepared by solvent evaporation method to enhance drug dissolution. The powdered forms of SD showed irregularly spherical shape. Thermal behaviors of SD from differential scanning calorimetry indicated that distinct endothermic peak of lacidipine () was shifted to lower region (). Drug was present in a crystalline form. NMR spectra also showed some molecular interaction between drug and Gelucire. There was no significant difference in DSC and NMR behaviors between Gelucire 44/14 and Gelucire 50/13. The initial dissolution rate of SD-loaded tablet linearly increased both in water and in water containing 1% tween 20, and much higher than the commercial tablet, . When the amount of SD was increased, the release rate was greater. The Gelucire 50/13 showed higher dissolution than the Gelucire 44/14. The produced solid dispersion with various kinds of excipients and making tablets, it was found that solid dispersions can increase the solubility in artificial gastric juice and finally increases dissolution rate.
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KEYWORD
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Solid dispersion, Gelucire, Thermal behavior, NMR spectra, Lacidipine
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