AAPS PharmSciTech

, Volume 10, Issue 1, pp 98–103 | Cite as

Evaluation of Polyethylene Oxide Compacts as Gastroretentive Delivery Systems

  • Ravichandran Mahalingam
  • Bhaskara Jasti
  • Raj Birudaraj
  • Dimitrios Stefanidis
  • Robert Killion
  • Tom Alfredson
  • Pratap Anne
  • Xiaoling Li
Research Article


Compacts containing selected bioadhesive polymers, fillers, and binders were investigated for their potential as a bioadhesive gastroretentive delivery system to deliver water soluble and water insoluble compounds in the stomach. Compacts with 90:10, 75:25, and 60:40 of polyvinylpyrrolidone (PVP) and polyethylene oxide (PEO) were evaluated for swelling, dissolution, bioadhesion, and in vitro gastric retention. Compacts containing higher PEO showed higher swelling (111.13%) and bioadhesion (0.62 ± 0.03 N/cm2), and retained their integrity and adherence onto gastric mucosa for about 9 h under in vitro conditions. In vivo gastroretentive property of compacts were evaluated in Yorkshire cross swines. Compacts containing 58% PVP, 40% PEO and 2% of water soluble or water insoluble marker compounds showed gastroadhesive and retentive properties in vivo. It is concluded that PEO in combination with PVP yields a non disintegrating type bioadhesive dosage form which is suitable for gastroretentive applications.

Key words

bioadhesion compacts gastroretentive polyethylene oxide polyvinylpyrrolidone 



The authors acknowledge Long Ranch (Manteca) for providing isolated porcine stomach tissues and Pork Power Farm (Turlock) for providing animal research facility for conducting animal studies.

Dedication of the Manuscript: This manuscript is dedicated to the memory of Joseph Robinson, Ph.D.


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Copyright information

© American Association of Pharmaceutical Scientists 2009

Authors and Affiliations

  • Ravichandran Mahalingam
    • 1
  • Bhaskara Jasti
    • 1
  • Raj Birudaraj
    • 2
  • Dimitrios Stefanidis
    • 2
  • Robert Killion
    • 2
  • Tom Alfredson
    • 2
  • Pratap Anne
    • 1
  • Xiaoling Li
    • 1
  1. 1.Department of Pharmaceutics and Medicinal Chemistry, T. J. Long School of Pharmacy and Health SciencesUniversity of the PacificStocktonUSA
  2. 2.Roche Palo Alto LLCPalo AltoUSA

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