4.1 Article

RELEASE AND MUCOADHESION PROPERTIES OF DICLOFENAC MATRIX TABLETS FROM NATURAL AND SYNTHETIC POLYMER BLENDS

期刊

ACTA POLONIAE PHARMACEUTICA
卷 72, 期 3, 页码 559-567

出版社

POLSKIE TOWARZYSTWO FARMACEUTYCZNE

关键词

Cedrela gum; delayed release; ducoadhesion matrix; polymer blend; release mechanism

资金

  1. TWAS
  2. World Academy of Sciences
  3. Universiti Sains Malaysia

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The delayed release and mucoadhesive properties of Cedrela gum and hydroxypropylmethylcellulose blend in diclofenac sodium tablet formulations were evaluated. Tablets were prepared by direct compression and the crushing strength and detachment force were found to increase from 74.49 +/- 1.22 to 147.25 +/- 2.57 N and 0.302 +/- 0.36 to 1.141 +/- 0.05 N from low to high level of polymers, respectively. The release kinetics followed Korsmeyer-Peppas release and the n varied between 0.834 and 1.273, indicating that the release mechanism shifts from Fickian to super case I (anomalous release). The drug release profile fits a pulsatile-release pattern characterized by a lag time followed by a more or less rapid and complete drug release. The Cedrela gum-hydroxypropylmethylcelluse blend tablets delayed diclofenac release for 2 h and sustained the release for 12 h. The polymer blend delayed drug release in the 0.1 M HCl simulating gastric environment and subsequent release pH 6.8 phosphate buffer.

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