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A review on design rules for formulating amorphous solid dispersions based on drug-polymer interactions in aqueous
Gayathri Ramachandran1, Indhu Annie Chacko1, M G Mishara1
1Molecular Pharmaceutics and Biopharmaceutics Research Lab (MPBRL), Dept. of Pharmaceutics, Amrita School of Pharmacy, AIMS Health Science Campus, Amrita Vishwa Vidyapeetham, Ponekkara, Kochi 682041, India.
International Journal of Pharmaceutics
|March 31, 2025
Summary
Amorphous solid dispersions (ASDs) improve drug solubility and bioavailability. Understanding drug-polymer interactions (DPI) is crucial for stabilizing supersaturation and optimizing ASD formulation design.
Area of Science:
- Pharmaceutical Sciences
- Materials Science
Background:
- Amorphous solid dispersions (ASDs) enhance the solubility of poorly soluble drugs by molecularly dispersing them within a carrier matrix.
- The dissolution of ASDs leads to a supersaturated drug state, crucial for bioavailability, but also prone to precipitation.
- Drug-polymer interactions (DPI) are critical for maintaining supersaturation stability but are challenging to characterize.
Purpose of the Study:
- To review the critical role of drug-polymer interactions (DPI) in stabilizing the supersaturated state during amorphous solid dispersion (ASD) dissolution.
- To highlight the challenges in characterizing DPI in solution and the influence of dissolution conditions.
- To emphasize the importance of understanding DPI for the rational design of effective ASD formulations.
Main Methods:
- This review synthesizes existing literature on amorphous solid dispersions (ASDs) and drug-polymer interactions (DPI).
- It critically analyzes the mechanisms of supersaturation generation and stabilization.
- It discusses the challenges and limitations of current analytical techniques for characterizing DPI.
Main Results:
- Drug-polymer interactions (DPI) are a key determinant of supersaturation stability and drug precipitation in ASDs.
- Characterizing DPI in solution is complex due to hydrodynamic resolution limits and variable dissolution conditions (pH, buffer, ionic strength).
- A deeper understanding of DPI is essential for developing robust ASD formulations with predictable performance.
Conclusions:
- Drug-polymer interactions (DPI) are fundamental to the successful formulation of amorphous solid dispersions (ASDs).
- Further research is needed to develop advanced techniques for characterizing DPI under relevant physiological conditions.
- Optimizing DPI is key to harnessing the full potential of ASDs for improving drug bioavailability.
Keywords:
Amorphous solid dispersionsBioavailability enhancementDissolution mechanismsDrug-polymer interactionsPhase-behaviourSupersaturation stabilityMore Related Videos
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