AAPS PharmSciTech

, Volume 11, Issue 1, pp 294–303

In Vitro Release Kinetics and Bioavailability of Gastroretentive Cinnarizine Hydrochloride Tablet

  • Ramesh C. Nagarwal
  • Devendra N. Ridhurkar
  • J. K. Pandit
Research Article

DOI: 10.1208/s12249-010-9380-5

Cite this article as:
Nagarwal, R.C., Ridhurkar, D.N. & Pandit, J.K. AAPS PharmSciTech (2010) 11: 294. doi:10.1208/s12249-010-9380-5
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Abstract

An oral sustained release dosage form of cinnarizine HCl (CNZ) based on gastric floating matrix tablets was studied. The release of CNZ from different floating matrix formulations containing four viscosity grades of hydroxypropyl methylcellulose, sodium alginate or polyethylene oxide, and gas-forming agent (sodium bicarbonate or calcium carbonate) was studied in simulated gastric fluid (pH 1.2). CNZ release data from the matrix tablets were analyzed kinetically using Higuchi, Peppas, Weibull, and Vergnaud models. From water uptake, matrix erosion studies, and drug release data, the overall release mechanism can be explained as a result of rapid hydration of polymer on the surface of the floating tablet and formation of a gel layer surrounding the matrix that controls water penetration into its center. On the basis of in vitro release data, batch HP1 (CNZ, HPMC-K100LV, SBC, LTS, and MgS) was subjected to bioavailability studies in rabbits and was compared with CNZ suspension. It was concluded that the greater bioavailability of HP1 was due to its longer retention in the gastric environment of the test animal. Batch no. HP1 of floating tablet in rabbits demonstrated that the floating tablet CNZ could be a 24-h sustained release formulation.

Key words

bioavailabilitycinnarizine HClfloating tabletHPMCkinetic models

Copyright information

© American Association of Pharmaceutical Scientists 2010

Authors and Affiliations

  • Ramesh C. Nagarwal
    • 1
  • Devendra N. Ridhurkar
    • 2
  • J. K. Pandit
    • 1
  1. 1.Department of Pharmaceutics, Institute of TechnologyBanaras Hindu UniversityVaranasiIndia
  2. 2.Macleods Research & Development CenterMumbaiIndia