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Factors Influencing Drug Absorption: Drug Dissolution

Factors Influencing Drug Absorption: Drug Dissolution

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...

Factors Affecting Dissolution: Particle Size and Effective Surface Area

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...

In Vitro Drug Dissolution: Compendial Testing Models I

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: Alternative Methods

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 Comparison

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...

Modified-Release Drug Delivery Systems: Rate-Programmed I

Modified-Release Drug Delivery Systems: Rate-Programmed I

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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Related Experiment Video

Updated: Jul 16, 2026

Coherent anti-Stokes Raman Scattering (CARS) Microscopy Visualizes Pharmaceutical Tablets During Dissolution

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Published on: July 4, 2014

Accelerated dissolution rate analysis (ACDRA) for controlled release drugs. Application to Roxiam

G Zackrisson¹, G Ostling, B Skagerberg

¹ASTRA Production Tablets AB, Södertälje, Sweden.

Journal of Pharmaceutical and Biomedical Analysis

|April 1, 1995

Summary

Accelerated dissolution rate analysis (ACDRA) significantly reduces drug release testing time compared to standard methods. This faster, automated approach aids in process control and formulation development for controlled-release drugs like Roxiam.

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Area of Science:

Pharmaceutical Sciences
Analytical Chemistry
Drug Delivery Systems

Background:

Controlled-release drug formulations require robust dissolution testing for quality control.
Standard United States Pharmacopeia (USP) dissolution methods can be time-consuming.
Optimizing drug release analysis is crucial for efficient pharmaceutical development.

Purpose of the Study:

To evaluate Accelerated Dissolution Rate Analysis (ACDRA) for remoxipride release from Roxiam.
To compare ACDRA with the standard USP dissolution method.
To assess the utility of ACDRA in process control and formulation development.

Main Methods:

Accelerated Dissolution Rate Analysis (ACDRA) using elevated temperature.
Analysis of remoxipride release from the controlled-release drug Roxiam.
Partial Least Squares (PLS) modeling for factor importance and method comparison.

Main Results:

ACDRA achieved a substantial reduction in analysis time, requiring less than 5% of the time needed for the USP method.
PLS modeling effectively evaluated release factors and facilitated comparison between ACDRA and the USP method.
The ACDRA procedure was found to be automated and suitable for practical application.

Conclusions:

ACDRA offers a significantly faster alternative to traditional USP dissolution testing.
The method is well-suited for real-time process control and early-stage formulation development.
ACDRA enhances efficiency in pharmaceutical quality control and research.