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Related Concept Videos

Drug Dissolution: Requirements and Profile Comparison01:14

Drug Dissolution: Requirements and Profile Comparison

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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 Dissolution: Alternative Methods01:17

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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...
142
In Vitro Drug Dissolution: Compendial Testing Models I01:13

In Vitro Drug Dissolution: Compendial Testing Models I

154
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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Factors Influencing Drug Absorption: Drug Dissolution01:27

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The pharmacokinetic journey of drugs from solid oral dosage forms into systemic circulation is multifaceted. It begins with disintegration, a prerequisite ensuring a solid dosage form's subdivision into minute particles. Dissolution occurs next as these granulated entities solubilize in gastrointestinal fluids. This solubilization is crucial for the succeeding stage, permeation, which describes the traversal of the drug across the intestinal membrane and its subsequent entry into the blood...
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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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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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Related Experiment Video

Updated: Dec 22, 2025

Coherent anti-Stokes Raman Scattering CARS Microscopy Visualizes Pharmaceutical Tablets During Dissolution
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Biphasic Dissolution as an Exploratory Method During Early Drug Product Development.

Daniela Amaral Silva1, Jozef Al-Gousous2, Neal M Davies1

  • 1Faculty of Pharmacy & Pharmaceutical Sciences, University of Alberta, Edmonton, AB T6G 2E1, Canada.

Pharmaceutics
|May 7, 2020
PubMed
Summary
This summary is machine-generated.

New biphasic dissolution methods offer improved drug product performance testing. These advanced techniques provide greater insight into in vitro drug release compared to traditional United States Pharmacopeia (USP) methods.

Keywords:
biphasic dissolutionbuffer capacitydrug product developmentibuprofenphysiologically relevant

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Area of Science:

  • Pharmaceutical Sciences
  • Drug Delivery and Formulation
  • Analytical Chemistry

Background:

  • Dissolution testing is crucial for assessing drug product performance and quality control of solid oral dosage forms.
  • Conventional compendial methods may lack the discriminatory power and physiological relevance needed to simulate in vivo dissolution.
  • Biphasic dissolution, using low buffer capacity media and an absorptive phase, enhances the in vitro testing's physiological relevance.

Purpose of the Study:

  • To evaluate the in vitro performance of different drug formulations using both non-compendial and compendial dissolution conditions.
  • To compare the discriminatory power of standard United States Pharmacopeia (USP) dissolution methods against novel non-compendial approaches.

Main Methods:

  • Utilized compendial dissolution testing as recommended by the United States Pharmacopeia (USP).
  • Employed non-compendial methods, including biphasic dissolution with low buffer capacity media and an absorptive phase.
  • Assessed the in vitro performance and discriminatory power of various drug formulations under different test conditions.

Main Results:

  • The USP-recommended dissolution method demonstrated limited discriminatory power between formulations and manufacturing methods.
  • Low buffer capacity media effectively discriminated between different manufacturing methods, indicating enhanced sensitivity.
  • The absorptive phase in biphasic dissolution aided in controlling medium pH by removing the drug from the aqueous phase.

Conclusions:

  • Non-compendial methods, particularly biphasic dissolution with low buffer capacity, exhibit superior discriminatory power compared to conventional dissolution conditions.
  • These advanced methods are more effective in differentiating between drug formulation and manufacturing method variations.
  • Biphasic dissolution and low buffer capacity media offer a valuable approach for early-stage drug product development, providing more physiologically relevant in vitro drug release insights.