Brazilian Journal of Pharmaceutical Sciences (Sep 2010)

Development and in vitro evaluation of sustained release multiparticulate tablet of freely water soluble drug

  • Ashlesha Pravin Pandit,
  • Rajendra Dattatray Shinde

DOI
https://doi.org/10.1590/S1984-82502010000300009
Journal volume & issue
Vol. 46, no. 3
pp. 463 – 471

Abstract

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Blends of aqueous dispersion of a hydrophobic and hydrophilic polymer, namely Surelease®: hydroxypropyl methylcellulose (Surelease®: HPMC E15) were used as coating materials to control the drug release from coated pellets of the highly water soluble drug metoprolol succinate. Varying the polymer blends, ranges of drug release patterns were obtained at pH 6.8. The present study dealt with diffusion of drug through plasticized Surelease®/ hydroxypropyl methylcellulose (HPMC E15) films prepared by coating of drug and polymers onto non-pareil seeds using the solution layering technique. The release of metoprolol succinate from coated pellets was decreased with increased coating load of polymer. The optimized formulation was obtained by 3² full factorial design. The release profile revealed that the optimized formulation follows zero order release kinetics. The stability data showed no interaction for storage at 25ºC and 60% relative humidity.Misturas das dispersões aquosas de polímero hidrofóbico e de polímero hidrofílico, a saber, Surelease®: hidroxipropil metilcelulose (Surelease®: HPMC E15), foram utilizadas como material de revestimento para controlar a liberação de fármacos de péletes revestidos de fármaco altamente solúvel, o succinato de metoprolol. Variando as misturas de polímeros, obtiveram-se faixas de padrão de liberação do fármaco em pH 6,8. O presente estudo tratou da difusão do fármaco através de filmes de Surelease®/hidroxipropil metilcelulose(HPMC E15), preparados pelo revestimento do fármaco e dos polímeros em sementes nonpareil, utilizando técnica de solução em camada. A liberação de succinato de metoprolol dos péletes revestidos diminuiu com o aumento da carga de polímero de revestimento. A formulação otimizada foi obtida por planejamento fatorial 3². O perfil de liberação revelou que a formulação otimizada segue a cinética de liberação de ordem zero. Os dados de estabilidade mostraram não haver interação por armazenamento a 25 ºC e umidade relativa de 60%.

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