Formulation of indomethacin colon targeted delivery systems using polysaccharides as carriers by applying liquisolid technique

Biomed Res Int. 2014:2014:704362. doi: 10.1155/2014/704362. Epub 2014 May 26.

Abstract

The present study aimed at the formulation of matrix tablets for colon-specific drug delivery (CSDD) system of indomethacin (IDM) by applying liquisolid (LS) technique. A CSDD system based on time-dependent polymethacrylates and enzyme degradable polysaccharides was established. Eudragit RL 100 (E-RL 100) was employed as time-dependent polymer, whereas bacterial degradable polysaccharides were presented as LS systems loaded with the drug. Indomethacin-loaded LS systems were prepared using different polysaccharides, namely, guar gum (GG), pectin (PEC), and chitosan (CH), as carriers separately or in mixtures of different ratios of 1:3, 1:1, and 3:1. Liquisolid systems that displayed promising results concerning drug release rate in both pH 1.2 and pH 6.8 were compressed into tablets after the addition of the calculated amount of E-RL 100 and lubrication with magnesium stearate and talc in the ratio of 1:9. It was found that E-RL 100 improved the flowability and compressibility of all LS formulations. The release data revealed that all formulations succeeded to sustain drug release over a period of 24 hours. Stability study indicated that PEC-based LS system as well as its matrix tablets was stable over the period of storage (one year) and could provide a minimum shelf life of two years.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Chemistry, Pharmaceutical
  • Chitosan / chemistry
  • Colon / drug effects*
  • Drug Carriers / chemistry*
  • Drug Delivery Systems / methods*
  • Drug Stability
  • Galactans / chemistry
  • Indomethacin / administration & dosage*
  • Indomethacin / pharmacology*
  • Kinetics
  • Male
  • Mannans / chemistry
  • Pectins / chemistry
  • Plant Gums / chemistry
  • Polysaccharides / chemistry*
  • Rats, Wistar
  • Rheology
  • Solubility
  • Spectroscopy, Fourier Transform Infrared
  • Tablets

Substances

  • Drug Carriers
  • Galactans
  • Mannans
  • Plant Gums
  • Polysaccharides
  • Tablets
  • Pectins
  • Chitosan
  • guar gum
  • Indomethacin