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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Mean dissolution time MDT value is used to characterize drug release rate from a dosage form and indicates the drug release retarding efficiency of polymer. Matrix systems are widely used in oral controlled drug delivery because of their flexibility, cost effectiveness, low influence of the physiological variables on its release behavior and broad regulatory acceptance [ 67 ].

To confirm the diffusion mechanism, the data were rspi into Korsmeyer-Peppas equation [ 23 ]. While in the systemic circulation the nanoparticles extend the half-life of the drug and release it in a sustained manner. All other ingredients used throughout the study were of analytical grade and were used as received.

Other Engineering Material Material Notes: The percentage prediction error was calculated which helps in the validation of generated regression by using 8. Compared to other methods like emulsion [ 19 ], desolvation [ 20 ], salting out, and supercritical fluid technology it involves an economy of energy and steps and does not require specialized eudragig.

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Hausner’s values of the prepared eufragit ranged from 1. These kinds of plots are useful in studying the effects of two independent factors on the response at one time [ 30 ].

To see MatWeb’s complete data sheet for this material including material property data, metal compositions, material suppliers, etcplease click the button below. Eudragit polymers are commercially available synthetic polymers used in drug delivery.

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However, the mixtures were continued to rslo sonicated at different time frames and were left to stir overnight to aid size reduction and to evaporate solvent present. The aim of the optimization was to obtain small particles size, small PDI, high EE, and high zeta potential. We advise that you only use the original value or one of its raw conversions in your calculations to minimize uedragit error.

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

It is also an important component of the fixed dose antiretroviral combinations Truvada, Atripla, and Complera [ 3 ]. This may be due to the reason that the gums in higher concentrations in the tablets might have produced dense matrix around the drug particles, providing more barriers for them to escape and dissolve. It can be seen from the plot that an increase in ratio of a polymer and concentration of a surfactant resulted in an increased mean particle size.

Hydrophilic drugs tend to rapidly equilibrate from the organic to the outer aqueous phase leaving very little drug in the precipitating nanoparticles [ 26 ].

Eudragit RS PO is used in the pharmaceutical industry as a film-coating agent for tablets and capsule [ 11 ]. It is insoluble at the physiological pH but the cationic charge facilitates rapid permeation through the intestinal mucosa [ 10 ]. Moreover, coefficient of determination indicates the proportion of variation in the data that is explained by the model.

Or if you don’t have an account with us yet, then click here to register. They are copolymers of acrylic and methacrylic esters compatible with oral drug administration [ 9 ]. These parameters are often screened and optimized using highly automated statistical tools and design of experiment.

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Factors with values that are less than 0.

Any terms in the models with high -value and small value indicate more significant effect on the respective response variables. These results are in good agreement with the results reported by Gannu et al. Various formulation and process variables such as amount of polymer, concentration of surfactant, amount of drug, stirring speed, stirring time, eduragit temperature play a key role in determining the final physical and mechanical characteristics of nanoparticles.

Mathematical models were developed to understand the nature of the true relationship between the input variables and the output variables of the system [ 32 ].

Journal of Nanomaterials

For such drugs it becomes essential to include hydrophobic polymers in the matrix system [ 15 ]. All the tablets of different formulations showed acceptable results with respect to weight variation, drug content uniformity, friability. Concentration of drug released was determined using UV spectrophotometer.

From Figure 3 aa higher EE was attained with decrease in ratio of polymer to a drug and a maximum concentration of a surfactant at a constant sonication time.

Time-controlled release

The equation derived for mean particle size is given in where, eudragiy are ratio of a polymer to a drug, concentration of a surfactant, and sonication time, respectively, and and are interaction effects between ratio of a polymer to a drug and sonication time, concentration of a surfactant, and sonication time while and are quadratic effect on mean particle size. The interactions between ratio of a polymer to a drug and concentration of a surfactant and ratio of a polymer to a drug and sonication time were also statistically significant on EE.

Umekar Department of Pharmaceutical Technology, Smt.