Drug Dev Ind Pharm. Feb;25(2) Evaluation of Eudragit RS-PO and Ethocel matrices for the controlled release of lobenzarit disodium. matrix tablets by using Eudragit RSPO and natural gums like guar copal as rate The use of synthetic Eudragit RSPO and gum copal were unable to retard the. Although Eudragit RSPO has been widely used as sustained release material; to our knowledge the property of its combination with GC and Gd has not been.

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It is insoluble at the physiological pH but the cationic charge facilitates rapid permeation through the intestinal mucosa [ 10 ].

The aim of the optimization was to obtain small particles size, small PDI, high EE, and high zeta potential. The encapsulated drug was calculated using. Cellulose ethers such as hydroxypropylmethylcellulose, sodium carboxymethylcellulose, Eudragit polymethacrylate polymer [ 89 ], ethyl cellulose [ 10 ] and some natural gums like guar gum and xanthan gum are widely used hydrophilic polymers as release retardants [ 11 ].

It is a potent inhibitor of the virus nucleotide reverse transcriptase and was approved for clinical use in [ 1 ]. Nanoscience and Nanotechnologyvol. Prior to compression, granules were evaluated for their flow and compressibility characteristics. As regards the effect of gum concentration, decrease in drug release rate was observed when GC and GD content in the matrix were increased. This could be attributed to an ionic electrostatic interaction between the drug and the polymer during formation of nanoparticles.


Journal of Nanomaterials

Nanoparticles present significant advantages over conventional free drug dosing [ 56 ]. The dissolution test was performed in triplicate.

This means that the drug payload can be transported by diffusion. The granules were evaluated for angle of repose, loose bulk density LBDtapped bulk density TBDcompressibility index and edragit content. Metformin hydrochloride is an orally administered biguanide, which is widely used in the management of type-II diabetes, a common disease that combines defects of both insulin secretion and insulin action [ 1 ].

El Baradi, and M. The coefficient of determination 0. Other Engineering Material Material Notes: The percentage prediction error was calculated which helps in the validation of generated regression by using 8.

Time-controlled Drug release

To graphically demonstrate the influence of each factor on the response, the surface plots for each response were generated results using BBD [ 23 ].

Similarly in Figure 3 ba higher EE was eudrait with a decrease in ratio of a polymer to a drug and a maximum sonication time at a constant concentration of a surfactant.

Mathematical models were developed to understand the nature of the true relationship between the input variables and the output variables of the system [ 32 ]. The in vitro drug release studies were carried out in dissolution media pH 7.

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Eudragit RSPO | Gum Copal | Gum Damar | Matrix Tablets | Release Kinetics

It was explained that an increase in polymer concentration leads eudrwgit an increase in viscous force resisting droplet breakdown by sonication [ 35 ]. The samples were prepared using a double adhesive tape stuck to an aluminium stub. ANOVA was performed to test the significance and adequacy of the model. This can be due to the fact that an rpso in polymer concentration led to an enhancement of the concentration gradient between emulsion droplets and eudragir continuous phase, as a result increasing the amount of drug partitioning into the continuous phase [ 38 ].


In this project we used a modified nanoprecipitation method to encapsulate tenofovir. Various formulation and process variables such as amount of polymer, concentration of surfactant, amount of drug, stirring speed, stirring time, and temperature play a key role in determining the final physical and mechanical characteristics of nanoparticles.

This is an open access article distributed under the Creative Commons Attribution Licensewhich permits unrestricted use, distribution, rxpo reproduction in any medium, provided the original work is properly cited.

Any terms in the models with high -value and small value indicate more significant effect on the respective response variables. A spherical morphology of the prepared nanoparticles was observed in the SEM images Figure 8. The objective of present study was to develop an optimized polymeric nanoparticle system for the antiretroviral drug tenofovir.

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