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Effect of wet mass on dextromethorphan hydrobromide matrix pellets
Ibrahim, Mohamed Abbas; Mahrous, Gamal Mohamed.
  • Ibrahim, Mohamed Abbas; King Saud University. College of Pharmacy. Department of Pharmaceutics. Riyadh. SA
  • Mahrous, Gamal Mohamed; King Saud University. College of Pharmacy. Department of Pharmaceutics. Riyadh. SA
Braz. J. Pharm. Sci. (Online) ; 54(4): e00228, 2018. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1001573
ABSTRACT
Dextromethorphan hydrobromide (DM) sustained release matrix pellets containing 10% w/w drug were prepared by an extrusion/spheronization technique. The effect of mixing different concentrations of ethyl cellulose (EC), hydroxypropyl methylcellulpse (HPMC K10), and Carbopol 934 with Avicel PH101 on the rheological properties of pellet wet mass was evaluated using mixer torque rheometry (MTR). The prepared pellets were characterized for size, drug content, and in-vitro DM release rate. The results showed that increasing the concentration of the hydrophobic polymer (EC) with Avicel PH101 decreased wet mass consistency, represented by mass mean line torque. Lower binder ratio was required for optimum wet massing, while mixing with swellable polymers (HPMC and Carbopol) caused a noticeable increase in both mean line torque and binder ratio. Combinations of HPMC and Carbopol at higher concentrations resulted in controlled in vitro release of DM from the prepared pellets. Furthermore, mathematical treatment of the in vitro release data of DM from the prepared pellets showed that all formulations except those containing 5% Carbopol plus 5% HPMC (F10) follow first order release. n values of these formulation were in the range of 0.09-0.40, which support an anomalous non-Fickian release.
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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Dextrometorfano / Implantes de Medicamentos Idioma: Inglés Revista: Braz. J. Pharm. Sci. (Online) Asunto de la revista: Farmacologia / Terapˆutica / Toxicologia Año: 2018 Tipo del documento: Artículo País de afiliación: Arabia Saudita Institución/País de afiliación: King Saud University/SA

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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Dextrometorfano / Implantes de Medicamentos Idioma: Inglés Revista: Braz. J. Pharm. Sci. (Online) Asunto de la revista: Farmacologia / Terapˆutica / Toxicologia Año: 2018 Tipo del documento: Artículo País de afiliación: Arabia Saudita Institución/País de afiliación: King Saud University/SA