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Related Concept Videos

In Vitro Drug Dissolution: Compendial Testing Models I01:13

In Vitro Drug Dissolution: Compendial Testing Models I

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Compendial dissolution methods are standardized procedures defined by pharmacopeias to evaluate the rate at which a drug dissolves in a specific medium. These methods ensure batch-to-batch consistency, enable quality control, and support the prediction of drug bioavailability. They are critical for both immediate and modified-release drug products.The apparatuses used for dissolution testing differ in their design and mechanical function, but all aim to simulate the physiological environment of...
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In Vitro Drug Dissolution: Compendial Testing Models II01:09

In Vitro Drug Dissolution: Compendial Testing Models II

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Various dissolution methods are utilized to assess a drug’s dissolution rate, including the flow-through cell, paddle-over-disk, cylinder, and reciprocating disk methods.The flow-through cell apparatus (USP (United States Pharmacopeia) method 4) comprises a reservoir for the dissolution medium and a pump that propels the medium through the cell containing the test sample. This method is crucial for assessing modified-release dosage forms with minimally soluble active ingredients,...
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In Vitro Drug Dissolution: Alternative Methods01:17

In Vitro Drug Dissolution: Alternative Methods

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Alternative drug dissolution methods include the rotating bottle, intrinsic dissolution test, peristalsis, and the Franz diffusion cell method. The rotating bottle method involves meticulously rotating tightly capped controlled-release beads in a temperature-controlled bath. Periodic decanting of samples allows for residue assay, followed by refilling with fresh medium and testing at various pH levels to emulate the gastrointestinal tract conditions.In contrast, the intrinsic dissolution test...
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Drug Dissolution: Requirements and Profile Comparison01:14

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379
The acceptance criteria for dissolution profile data are anchored in Q values, representing the percentage of drug dissolved within a specified period. This assessment unfolds in three stages:First Stage: The test passes if all six drug dosage units are equal to or greater than Q plus 5%; otherwise, the sample proceeds to the second stage.Second Stage: The average of twelve units must be equal to or greater than Q, with no unit falling below Q - 15% to pass; if not, it progresses to the final...
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In Vitro Drug Release Testing: Overview, Development and Validation01:10

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In vitro dissolution and drug release tests assess how quickly and how much of a drug is released from its dosage form into an aqueous medium under standardized laboratory conditions. These tests are essential tools in pharmaceutical development and quality assurance, offering insight into the drug's performance before clinical use.During formulation development, dissolution testing identifies incomplete or inconsistent drug release issues. It also supports decisions on selecting the optimal...
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Theories of Dissolution: Diffusion Layer Model01:15

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Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
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Small Volume Dissolution Testing as a Powerful Method during Pharmaceutical Development.

Emmanuel Scheubel1,2, Marc Lindenberg3, Eric Beyssac4

  • 1Biopharmaceutical department, Faculty of Pharmacy, University of Auvergne 28 Place H. Dunant, BP 38, 63001 Clermont-Ferrand, France. emmanuel.scheubel@roche.com.

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Small volume dissolution methods offer advantages over standard apparatus for characterizing immediate-release drug products. This technique enhances method discrimination, aiding in pharmaceutical development by evaluating critical quality attributes.

Keywords:
DiscriminationDissolutionQuality By DesignScreeningSmall volume

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Area of Science:

  • Pharmaceutical Sciences
  • Drug Delivery and Formulation
  • Analytical Chemistry

Background:

  • Standard compendial dissolution apparatus are commonly used but have limitations regarding sample size, analytical sensitivity, and biorelevance.
  • Non-compendial methods, such as small volume dissolution, are increasingly explored to overcome these limitations in pharmaceutical development.
  • Small volume dissolution offers potential advantages for method development and characterization of drug products.

Purpose of the Study:

  • To evaluate the dissolution performance of various drug products with different release mechanisms using small volume USP2 dissolution equipment.
  • To assess the utility of small volume dissolution for characterizing immediate-release drug products and improving method discrimination.

Main Methods:

  • Utilized commercially available small volume USP2 dissolution apparatus.
  • Tested various drug products exhibiting different drug release mechanisms.
  • Proposed specific speed factors to simulate the performance of standard one-liter dissolution vessels.

Main Results:

  • Small volume dissolution proved to be an effective tool for characterizing immediate-release drug products.
  • Different speed factors were identified to effectively mimic the performance of larger, standard dissolution vessels based on drug release mechanisms.
  • The method demonstrated increased discriminating power, enhancing understanding of formulation behavior during development stages like ageing and scale-up.

Conclusions:

  • Small volume dissolution is a valuable technique for the characterization of immediate-release drug products.
  • It offers enhanced method discrimination, particularly useful for screening critical quality attributes of rapidly dissolving tablets where standard methods may lack sensitivity.
  • This approach provides deeper insights into formulation performance and aids in evaluating key pharmaceutical development events.