Drug Dissolution in Oral Drug Absorption: Workshop Report

Area of Science:

• Pharmaceutical Sciences
• Biopharmaceutics
• Drug Delivery

Background:

• The workshop
• Drug Dissolution in Oral Drug Absorption
• convened experts to discuss critical aspects of drug dissolution and its impact on oral drug absorption.
• Key themes included amorphous solid dispersions (ASDs), the interplay between dissolution and permeation, and the development of in vitro methods for predicting in vivo performance.

Purpose of the Study:

• To identify and discuss current challenges and emerging trends in drug dissolution science relevant to oral drug absorption.
• To explore advancements in in vitro methodologies for assessing drug performance and predicting in vivo outcomes.
• To address regulatory considerations and potential obstacles for novel dissolution testing approaches.

Main Methods:

• The workshop featured lectures and breakout sessions, facilitating in-depth discussions on specific topics.
• Key areas of focus included the characterization of dissolved drug in complex media, limitations of standard dissolution tests, and the application of non-compendial methods.
• Discussions also covered specialized conditions and the potential benefits of biopredictive methods.

Main Results:

• Recurring topics highlighted the complexity of defining and measuring "dissolved drug," especially for poorly soluble drugs in colloidal systems.
• Limitations of traditional sink conditions in dissolution testing were identified, prompting exploration of non-compendial methods and conditions.
• The potential utility of biopredictive dissolution methods for regulatory purposes, such as biowaivers, was recognized.

Conclusions:

• Accurate assessment of dissolved drug, particularly for poorly soluble compounds in challenging media, remains a critical area for development.
• Non-compendial dissolution methods and conditions offer promise for improved biopharmaceutical predictions but face regulatory acceptance hurdles.
• A balanced approach, potentially integrating quality control and biopredictive methods, may be necessary for comprehensive drug product evaluation.