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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

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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

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 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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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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Self-Nanoemulsification of Healthy Oils to Enhance the Solubility of Lipophilic Drugs
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Program for evaluating drug dissolution kinetics in preformulation.

M Nicklasson1, A B Magnusson

  • 1Research and Development Laboratories, Pharmaceutics, Solid Systems, Astra Läkemedel AB, S-151 85, Södertälje, Sweden.

Pharmaceutical Research
|November 26, 2013
PubMed
Summary
This summary is machine-generated.

This study explores drug dissolution kinetics using rotating disc methods. The findings offer a comprehensive preformulation program for evaluating pharmaceutical and biopharmaceutical parameters.

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Area of Science:

  • Pharmaceutical Science
  • Physical Chemistry
  • Biopharmaceutics

Background:

  • Understanding drug dissolution is crucial for predicting in vivo performance.
  • Existing methods may not capture all relevant parameters for drug formulation.
  • Hydrodynamic conditions significantly impact drug release profiles.

Purpose of the Study:

  • To investigate in vitro dissolution kinetics of various drugs under diverse conditions.
  • To develop a comprehensive preformulation program integrating multiple dissolution parameters.
  • To analyze the influence of hydrodynamic factors on drug dissolution rates.

Main Methods:

  • Utilized both a centrically rotating disc method and a modified excentrically rotating disc method.
  • Performed dissolution studies under varied experimental and hydrodynamic conditions.
  • Collected data to calculate intrinsic dissolution tendency, acid dissociation constant, diffusion coefficient, and enthalpy of dissolution.

Main Results:

  • Demonstrated the significant influence of hydrodynamic conditions on drug dissolution rates.
  • Successfully obtained the intrinsic dissolution tendency for tested drugs.
  • Calculated key physicochemical parameters including acid dissociation constant and diffusion coefficient.
  • Established relationships between dissolution rate and aqueous solubility for the drugs.

Conclusions:

  • The combined rotating disc methods offer a robust preformulation strategy.
  • This approach provides valuable pharmaceutical and biopharmaceutical insights into drug dissolution.
  • The study highlights the importance of hydrodynamic control in dissolution testing.