New Development in Understanding Drug-Polymer Interactions in Pharmaceutical Amorphous Solid Dispersions from...

Area of Science:

• Pharmaceutical Science
• Solid-State Chemistry
• Materials Science

Background:

• Amorphous solid dispersions (ASDs) enhance drug bioavailability by dispersing active pharmaceutical ingredients (APIs) in polymers.
• The stability of ASDs relies on intermolecular interactions between APIs and polymers, such as hydrogen bonds and electrostatic forces.
• Understanding these interactions at the atomic level is crucial for developing effective drug delivery systems.

Purpose of the Study:

• To highlight recent experimental strategies for identifying API-polymer interactions in ASDs using solid-state NMR.
• To showcase advancements in one-dimensional (1D) and two-dimensional (2D) NMR experiments.
• To illustrate how very-high magnetic fields and ultrafast magic angle spinning (MAS) enhance the study of ASDs.

Main Methods:

• Utilizing solid-state nuclear magnetic resonance (NMR) spectroscopy.
• Employing one-dimensional (1D) and two-dimensional (2D) NMR experiments.
• Leveraging very-high magnetic fields and ultrafast magic angle spinning (MAS) techniques.

Main Results:

• Demonstrated the power of solid-state NMR in probing API-polymer interactions within ASDs.
• Provided recent examples of 1D and 2D NMR experiments applied to various ASD systems.
• Illustrated novel approaches to understand the stability mechanisms of ASDs.

Conclusions:

• Solid-state NMR is a powerful tool for elucidating API-polymer interactions in ASDs.
• Advanced NMR techniques, including high magnetic fields and ultrafast MAS, offer new insights into ASD stability.
• This research enables the rational design of more stable and effective amorphous solid dispersions for improved drug bioavailability.