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Rate-programmed drug delivery systems (DDS) are designed to release drugs at specific, controlled rates to maintain consistent therapeutic levels. These systems are categorized based on their release mechanisms, including dissolution-controlled DDS, diffusion-controlled DDS, and combined dissolution-diffusion-controlled DDS.In dissolution-controlled DDS, the release rate depends on the slow dissolution of the drug itself or the surrounding matrix. Drugs with inherently slow dissolution rates,...
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Continuous-release drug delivery systems offer a strategic approach to maintaining therapeutic drug levels over extended periods following oral administration. By modulating the release rate of active pharmaceutical ingredients, these systems minimize fluctuations in plasma concentrations, which enhances clinical efficacy and reduces the need for frequent dosing. Such characteristics make them particularly advantageous in managing chronic diseases where patient adherence and stable drug...
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In vivo predictive release methods for medicated chewing gums.

Jayachandar Gajendran1, Johannes Kraemer, Peter Langguth

  • 1Institute of Pharmacy and Biochemistry, Therapeutical Life Sciences, Johannes Gutenberg University, Mainz, Germany.

Biopharmaceutics & Drug Disposition
|June 8, 2012
PubMed
Summary

Developing effective in vitro drug release methods for medicated chewing gums is crucial. This study optimized a testing apparatus to predict in vivo performance, considering chewing parameters like frequency and motion.

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Area of Science:

  • Pharmaceutics
  • Drug Delivery Systems

Background:

  • Medicated chewing gums present unique drug release challenges compared to conventional oral dosage forms.
  • Predicting in vivo drug performance requires specialized in vitro release methodologies tailored to chewing gum characteristics.

Purpose of the Study:

  • To develop and validate a suitable drug release methodology for predicting the in vivo performance of a medicated chewing gum product.
  • To evaluate the impact of various parameters within the drug release testing apparatus on drug release.

Main Methods:

  • Evaluated different parameters of drug release testing apparatuses described in Ph. Eur. and Pharmeuropa.
  • Investigated the effects of chewing distance, chewing frequency, and twisting motion on drug release.
  • Identified a suitable apparatus setup for in vitro release testing.

Main Results:

  • Increased chewing frequency (40 to 60 chews/min) and twisting motion (20º to 40º) enhanced drug release.
  • Optimal chewing distances for release rate were identified as 0.3 mm for apparatus A and 1.4 mm for apparatus B.
  • Drug release was significantly influenced by the tested parameters.

Conclusions:

  • A robust in vitro drug release method was established for medicated chewing gums.
  • The developed method can facilitate the establishment of in vitro-in vivo correlations (IVIVC).
  • Apparatus interchangeability requires careful consideration due to differing operational principles.