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    Formulaci贸n y Optimizaci贸n del Sistema Flotante de Amoxicilina para el tratamiento efectivo de la infecci贸n por Helicobacter pylori

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    The authors thank DST-FIST Lab (RERDS-CPR), R&D Director, for providing necessary facilities and assistance to perform this research work.Introducci贸n: El objetivo del presente estudio fue formular y caracterizar el Sistema Flotante (FRS, siglas en Ingl茅s) de Amoxicilina para prolongar el tiempo de residencia g谩strica y liberaci贸n del f谩rmaco para el enfoque efectivo del Helicobacter pylori. M茅todo: Para el presente estudio se seleccionaron como factores goma guar, Monoestearato de glicerilo (GMS), carbonato de calcio. Como reacciones, se seleccionaros el per铆odo de congelaci贸n (h), el lapso de flotaci贸n (min), y el porcentaje acumulado de liberaci贸n del f谩rmaco (CDR). Para la experimentaci贸n se seleccionaron el dise帽o factorial 23 con r茅plicas. Resultados: Se observ贸 que la goma guar y el GMS fueron los factores principales que afectaron el per铆odo de congelaci贸n y mostraron un efecto sin茅rgico (positivo). Mientras que la goma guar y el carbonato de calcio mostraron un efecto positivo y el GMS mostr贸 un efecto antag贸nico (negativo) en el lapso de flotaci贸n. El porcentaje CDR mostr贸 un efecto antag贸nico en todos los factores. Se emplearon curvas de nivel para identificar el dise帽o del espacio, an谩lisis num茅ricos posteriores produjeron 12 soluciones 贸ptimas en base a la deseabilidad. El FRS mostr贸 un mayor AUCo-t, Cmax, tmaxy t1/2 cuando se compar贸 con la formulaci贸n comercial, aproximadamente 2.30 cambios m煤ltiplos y prolongaci贸n con liberaci贸n sostenida por m谩s de 24 h que pudo deberse a una mejor congelaci贸n. Conclusiones: Se puede concluir que el sistema flotante se desarroll贸 satisfactoriamente por la aplicaci贸n del Dise帽o de Experimentos (DoE) con menores ensayos y utilizando f谩cilmente los excipientes disponibles para una mejor flotaci贸n, congelaci贸n y suministro constante del f谩rmaco.Introduction: The aim of the present study was to develop and to characterize the floating raft system (FRS) of Amoxicillin to enhance gastric residence time and drug release to target Helicobacter pylori effectively. Method: In the present study, guar gum, glyceryl monostearate (GMS), calcium carbonate were selected as factors. Gelation duration (h), floating lag time (min), and % Cumulative drug release (CDR) were selected as responses. 23 factorial design with replicates was selected for experimentation. Results: It was observed that guar gum and GMS were the major factors affecting gelation duration, increase in the quantity of both guar gum and GMS increased gelation duration i.e., sustained gelation period (24 h). Floating time increased with an increase in the amount of guar gum and calcium carbonate, whereas an increase in the quantity of GMS decreased floating time. Guar gum, calcium carbonate, and GMS exhibited an antagonistic effect on % CDR. Contour plots were used to identify design space; further numerical analysis yielded 12 best solutions based on desirability. FRS exhibited greater AUCo-t, Cmax, tmax, and t1/2 when compared to marketed formulation approximately 2.30 folds enhancement and prolongation with a sustained release for greater than 24 h that might be due to better gelation. Conclusions: It can be concluded that the floating raft system was successfully developed by the Design of experiment (DoE) application with fewer trails and by utilizing easily available excipients for better floating, gelation, and sustained delivery of the drug
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