Interpolymer interactions between the countercharged polymers like Eudragit® EPO (polycation) and hypromellose acetate succinate. PDF | The objective of this investigation was to evaluate the potential of Eudragit EPO nanoparticles (EPO NP) in improving therapeutic efficacy. Download scientific diagram | Molecular structures of (a) MFA, (b) EUDRAGIT® EPO, and (c) EUDRAGIT® L from publication: Stabilization of a.

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The tablets were placed into mL of dissolution medium. On analyzing regression coefficient values, it was found that F8 formulation exhibits first-order kinetics 0. Kinetic Analysis of Release Data To describe the kinetics of drug release from the selected matrix formulation F8release data was analyzed according to different kinetic equations. The percentage friability was calculated using the following equation:.

Acetaminophen was obtained from Mylan laboratories limited Hyderabad, India as a gift sample. National Center for Biotechnology InformationU.

Evonik EUDRAGIT® E PO Copolymer

Indian J Pharm Sci. The increase in polymer concentration resulted in an increase peo the MDT values, where for mg polymer concentration the MDT value was 4.

Please contact us at webmaster matweb. Eur J Pharm Biopharm. The swelling of the polymers upon hydration by the test medium was determined by a method similar to the equilibrium weight gain method as reported earlier FT-IR spectrum of treated polymers. Amoxicillin loaded chitosan-alginate polyelectrolyte complex nanoparticles as mucopenetrating delivery system for h.


The thickness of the tablets varied depending on bulk density of the dried granules used and the compression force applied.

The spectrum of EE Fig. Effect of Dissolution Medium The effect of dissolution media pH 1. On the other hand, sustained drug release was observed in pH 6.

Ho C, Hwang GC. The physical mixture of polymer mixtures showed the bands for the single components data not shown.

Other Engineering Material Material Notes: It was found that drug release followed zero-order kinetics and was controlled by the superposition of the diffusion and erosion. To study the release kinetics from the matrix tablets, the release data were fitted to the well-known exponential equation power law or Korsmeyer-Peppas equationwhich is often used to describe the drug release behavior from polymeric systems Modeling and comparison of dissolution profiles.

Use of hydroxypropyl methylcellulose acetate succinate in an enteric polymer matrix to design controlled-release tablets of amoxicillin trihydrate. Eudragit E, hypromellose acetate succinate, hypromellose phthalate polyelectrolyte complexation. EE and enteric polymer, at 1: Questions or comments about MatWeb? Subscribe to Premium Services Searches: The slight increase in the MDT value with increasing polymer concentration can be ascribed to the entanglement density of the polymer at higher concentrations.

Release Profile Comparison The drug release profiles were compared using two model-independent eidragit, mean dissolution time MDTand similarity factor f 2 The present study demonstrated the successful application of the combination of anionic polymethacrylates and cationic enteric polymer such as hypromellose phthalate and hypromellose acetate succinate to sustain the acetaminophen release up to 12 h at eudragkt pH conditions.


The release rate was fastest for the lower polymer concentration formulation F10 with a K value of The manufactured tablets showed low weight variation indicating that the wet granulation method wpo an acceptable method for preparing good-quality matrix tablets.

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Increasing the total amount of polymers in the formulation from mg F10 to mg F9 and mg F8 resulted in a slower release rate and extended drug release from the tablet. Formulated tablets were subjected to the following physical characterization studies.

The spectrum of EL Fig.

The f 2 factor value was observed to be J Appl Polym Sci. The drug content was determined spectrophotometrically at a wavelength of nm. An f 2 value of suggests that the test and reference profiles are identical and, as the value becomes smaller, the dissimilarity between release profiles increases.

Swelling Study It is well known that the release properties of polymeric carriers can be somehow predicted by the determination of their swelling and erosion characteristics

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