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Year : 2016  |  Volume : 12  |  Issue : 46  |  Page : 245-252

Preparation and evaluation of andrographolide solid dispersion vectored by silicon dioxide

1 Department of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
2 Teaching Hospital of Chengdu University of TCM, Chengdu 610072, China
3 Key Laboratory of Modern Preparation of TCM, Jiangxi University of Traditional Chinese Medicine, Ministry of Education, Nanchang 330004, China
4 Sichuan University, Chengdu 610064, China

Correspondence Address:
Li Han
No. 1166, Liutai Avenue, Chengdu 610017
Ming Yang
No. 818, Xingwan Avenue, Nanchang330004
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0973-1296.182156

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Background: Andrographolide (Andro) is a “natural antibiotic” as well as a typical insoluble drug. The purpose of this study was to investigate the feasibility of commercially available silica (SiO2) as a carrier of solid dispersion to enhance the dissolution of Andro. Materials and Methods: The solvent evaporation method was adopted, and a series of process parameters were studied to prepare a solid dispersion. Andro, SiO2, physical mixture, and solid dispersion were characterized with respect to particle size distribution, special surface area, pore volume, and scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction studies. Results: Single factor test suggested the best preparation of solid dispersion was the drug and carrier (SiO2B) ratio of 1:8, with tetrahydrofuran as the solvent, and a recovery temperature of 50°C. Compared to crude drug and mixture, solid dispersion was found to form a unique structure to disperse the drug and displayed superior performance in rapid dissolution. Conclusion: The present study signifies the commercially available SiO2is an excellent but cheap carrier to improve the dissolution of Andro. Our results provide a highly operability approach for improving the dissolution of insoluble natural products and are beneficial for the clinical effects improvement. SUMMARY
  • The potential of commercially available silica as a carrier for enhancing the insoluble drug dissolution was investigated
  • Factors affecting the dissolution of solid dispersion were investigated
  • Solid dispersion formed a unique structure to disperse the drug and release drug rapidly
  • Commercially available silica is an excellent but cheap carrier to improve the dissolution of Andro.
Abbreviation used: Andro: Andrographolide, BCS: Biopharmaceutics Classification System, SDS: Tetrahydrofuran and Sodium dodecyl sulfate, HPLC: High Performance Liquid Chromatography, SEM: Scanning Electron Microscope, BET: Brumauer–Emmett–Teller, FTIR: Fourier Transform Infrared Spectroscopy, XRD: X-ray Diffraction.

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