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Related Concept Videos

In Vitro Drug Dissolution: Compendial Testing Models I01:13

In Vitro Drug Dissolution: Compendial Testing Models I

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...
In Vitro Drug Dissolution: Compendial Testing Models II01:09

In Vitro Drug Dissolution: Compendial Testing Models II

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, maintaining...
In Vitro Drug Dissolution: Alternative Methods01:17

In Vitro Drug Dissolution: Alternative Methods

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...
Drug Dissolution: Requirements and Profile Comparison01:14

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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...
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...
Factors Affecting Dissolution: Particle Size and Effective Surface Area01:23

Factors Affecting Dissolution: Particle Size and Effective Surface Area

Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are employed to...

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The random vibration effects on dissolution testing with USP apparatus 2.

Zongming Gao1, Terry W Moore, Lucinda F Buhse

  • 1Food and Drug Administration, Center for Drug Evaluation and Research, Division of Pharmaceutical Analysis, St. Louis, Missouri 63101, USA. zongming.gao@fda.hhs.gov

Journal of Pharmaceutical Sciences
|April 11, 2008
PubMed
Summary

Vibration significantly impacts drug dissolution testing variability. Understanding and measuring vibration is crucial for accurate drug formulation and quality control, improving dissolution test reliability.

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Area of Science:

  • Pharmaceutical Sciences
  • Analytical Chemistry
  • Mechanical Engineering

Background:

  • Dissolution testing is vital for drug formulation and quality control.
  • High variability in dissolution test results is a common challenge.
  • External factors like vibration can contribute to this variability.

Purpose of the Study:

  • To investigate the impact of controlled vertical random vibration on dissolution testing.
  • To correlate measured vibration with dissolution profiles of prednisone tablets.
  • To develop a method for meaningful vibration measurement in dissolution apparatus.

Main Methods:

  • Utilized a Distek USP Apparatus 2 for dissolution testing of prednisone tablets.
  • Applied controllable vertical random vibration to the apparatus during testing.
  • Recorded real-time vibration waveforms using accelerometers on the vessel plate and vessels.

Main Results:

  • Demonstrated a strong correlation between induced vibration and dissolution results.
  • Confirmed that vibration measured on the vessel plate correlates with vibration within vessels.
  • Observed that vibration affects disintegration and dissolution through different mechanisms, influencing results.

Conclusions:

  • Vibration is a significant source of variability in dissolution testing.
  • Accurate measurement and understanding of vibration are essential for reliable dissolution results.
  • The study provides a method for effective vibration assessment in dissolution testing.