30
views
0
recommends
+1 Recommend
1 collections
    4
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Compression and evaluation of extended release matrix pellets prepared by the extrusion/spheronization process into disintegrating tablets

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          In this study, a novel approach for compression of matrix pellets into disintegrating tablets has been studied in an attempt to overcome the issues pertaining to rupture of polymer coat during compression of reservoir-type pellets. Extended release matrix pellets were prepared by the extrusion/spheronization technique using commercially available aqueous dispersions of ethyl cellulose, acrylic polymers and sodium alginate at 10%, 20% and 30%w/w levels. Sertraline hydrochloride was used as the model drug and an in vitro release profile of 12 h was targeted. Tablets containing matrix pellets were prepared by the direct compression process. Acceptance Value, a pharmacopeial test, was applied to study the uniformity of drug distribution. Effect of compression force (2-6 kN), extrusion screen aperture size, diluent blend composition and pellet percentage on drug release and acceptance value were studied. As polymer is uniformly distributed within each pellet, the drug release pattern from uncompressed pellets was comparable to compressed tablets. Surface morphological changes due to calcium chloride treatment were observed using Scanning electron microscopy. The pellet segregated from the surface of the tablet was found to be flattened in the direction of applied compression force with minor deformities. In conclusion, matrix pellets can constitute an alternative approach to reservoir-type pellets in obtaining disintegrating tablets for extended delivery of drugs.

          Translated abstract

          Nesse trabalho, estudou-se nova abordagem para a compressão de matrizes de péletes em comprimidos desintegrantes, com o intuito de resolver os problemas relativos à ruptura do polímero de revestimento durante a compressão dos péletes do tipo reservatório. Matrizes de péletes de liberação estendida foram preparadas pela técnica de extrusão/esferonização, utilizando dispersões aquosas comercialmente disponíveis de etil celulose, polímeros acrílicos e alginato de sódio a 10%, 20% e 30% p/p. O cloridrato de sertralina foi utilizado como fármaco modelo e focalizou-se no perfil de liberação in vitro de 12 horas. Os comprimidos contendo matrizes de péletes foram preparados pelo processo de compressão direta. O valor de aceitação, teste farmacopéico, foi aplicado para estudar a uniformidade de distribuição do fármaco. O efeito da força de compressão (2-6 kN), o tamanho da abertura de extrusão, a composição da mistura diluente, a porcentagem de pélete na liberação de fármaco e o valor de aceitação foram estudados. Como o polímero é uniformemente distribuído dentro de cada pélete, o padrão de liberação do fármaco dos péletes não-comprimidos foi comparável àquele dos comprimidos. As mudanças morfológicas da superfície devidas ao tratamento com cloreto de cálcio foram observadas utilizando-se a microscopia eletrônica de varredura. O pélete segregado da superfície do comprimido mostrou-se plano em direção à força de compressão aplicada com menores deformidades. Em conclusão, os péletes matriz podem se constituir em abordagem alternativa para péletes do tipo reservatório na obtenção de comprimidos desintegrantes para fármacos de liberação estendida.

          Related collections

          Most cited references30

          • Record: found
          • Abstract: not found
          • Article: not found

          Structure and behaviour in hydrophilic matrix sustained release dosage forms: 3. The influence of pH on the sustained-release performance and internal gel structure of sodium alginate matrices

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Tableting of coated pellets

              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Compression of pellets coated with various aqueous polymer dispersions.

              Pellets coated with a new aqueous polyvinyl acetate dispersion, Kollicoat SR 30 D, could be compressed into tablets without rupture of the coating providing unchanged release profiles. In contrast, the compression of pellets coated with the ethylcellulose dispersion, Aquacoat ECD 30, resulted in rupture of the coating and an increase in drug release. Plasticizer-free Kollicoat SR coatings were too brittle and ruptured during compression. The addition of only 10% w/w triethyl citrate as plasticizer improved the flexibility of the films significantly and allowed compaction of the pellets. The drug release was almost independent of the compression force and the pellet content of the tablets. The inclusion of various tabletting excipients slightly affected the drug release, primarily because of a different disintegration rate of the tablets. The core size of the starting pellets had no influence on the drug release. Pellets coated with the enteric polymer dispersion Kollicoat 30 D MAE 30 DP [poly(methacrylic acid, ethyl acrylate) 1:1] lost their enteric properties after compression because of the brittle properties of this enteric polymer. Coating of pellets with a mixture of Kollicoat MAE 30 DP and Kollicoat EMM 30 D [poly(ethyl acrylate, methyl methacrylate) 2:1] at a ratio of 70/30 and compaction of the pellets resulted in sufficient enteric properties.
                Bookmark

                Author and article information

                Journal
                bjps
                Brazilian Journal of Pharmaceutical Sciences
                Braz. J. Pharm. Sci.
                Universidade de São Paulo, Faculdade de Ciências Farmacêuticas (São Paulo, SP, Brazil )
                2175-9790
                March 2012
                : 48
                : 1
                : 117-129
                Affiliations
                [01] Hyderabad orgnameMatrix Laboratories Ltd. orgdiv1Formulation Development Services India
                [02] New Delhi India orgnameJamia Hamdard University orgdiv1Faculty of Pharmacy orgdiv2Department of Pharmaceutics
                [03] Jaipur orgnameJaipur National University orgdiv1Faculty of Pharmaceutical Sciences India
                Article
                S1984-82502012000100014 S1984-8250(12)04800114
                10.1590/S1984-82502012000100014
                afd30161-eaa0-4e2d-9a55-30e21f27900e

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 19 September 2011
                : 23 June 2011
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 30, Pages: 13
                Product

                SciELO Brazil

                Categories
                Articles

                Pellets,Extrusion,Técnica de extrusão
                Pellets, Extrusion, Técnica de extrusão

                Comments

                Comment on this article