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The objective of this study was to improve the solubility and bioavailability of curcumin by a new curcumin dripping pills (Cur-DPs) formulation using melt mixing methods. The optimal formulation consisted of Polyethoxylated 40 hydrogenated castor oil (Cremophor RH40), Poloxamer 188, and Polyethylene glycol 4000 (PEG 4000). Differential scanning calorimetry (DSC), powder X-ray diffraction (PXRD), and Fourier-transform infrared spectroscopy (FT-IR) were used to verify the forming of Cur-DPs. All the physical characterization information proved the formation of Cur-DPs, and the results demonstrated the superiority of the dripping pills in dissolution rates. The pharmacokinetic study of Cur-DPs was performed in rats compared to the pure curcumin suspension. The oral bioavailability of poorly water-soluble curcumin was successfully improved by CUR-DPs. And the stability of prepared Cur-DP was also in a good state in 3 months. These results identified the Cur-DPs was an effective new approach for pharmaceutical application.

Enhancement of Oral Bioavailability of Curcumin by a Novel Solid Dispersion System