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KMID : 0043320090320060893
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Archives of Pharmacal Research
2009 Volume.32 No. 6 p.893 ~ p.898
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Physicochemical Characterization of Tacrolimus-loaded Solid Dispersion with Sodium Carboxylmethyl Cellulose and Sodium Lauryl Sulfate
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Choi Han-Gon
Woo Jong-Soo
Yong Chul-Soon
Lee Young-Im
Seo Youn-Gee
Kim Jong-Oh
Oh Dong-Hoon
Quan Qi-Zhe
Li Dong-Xun
Park Young-Joon
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Abstract
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To develop a novel tacrolimus-loaded solid dispersion with improved solubility, various solid dispersions were prepared with various ratios of water, sodium lauryl sulfate, citric acid and carboxylmethylcellulose-Na using spray drying technique. The physicochemical properties of solid dispersions were investigated using scanning electron microscopy, differential scanning calorimetery and powder X-ray diffraction. Furthermore, their solubility and dissolution were evaluated compared to drug powder. The solid dispersion at the tacrolimus/CMC-Na/sodium lauryl sulfate/citric acid ratio of 3/24/3/0.2 significantly improved the drug solubility and dissolution compared to powder. The scanning electron microscopy result suggested that carriers might be attached to the surface of drug in this solid dispersion. Unlike traditional solid dispersion systems, the crystal form of drug in this solid dispersion could not be converted to amorphous form, which was confirmed by the analysis of DSC and powder X-ray diffraction. Thus, the solid dispersion system with water, sodium lauryl sulfate, citric acid and CMC-Na should be a potential candidate for delivering a poorly water-soluble tacrolimus with enhanced solubility and no convertible crystalline.
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KEYWORD
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Solid dispersion, Tacrolimus, Sodium carboxylmethyl cellulose, Sodium lauryl sulfate, Solubility
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