Advanced microscopy techniques to assess solid-state properties of inhalation medicines

Area of Science:

• Pharmaceutical Sciences
• Materials Science
• Analytical Chemistry

Background:

• Effective orally inhaled drug products (OIDPs) depend on controlling the physico-chemical properties of active pharmaceutical ingredients (APIs) and excipients.
• A material science-based approach and advanced analytical tools are essential for understanding how solid-state properties impact OIDP structure and function.
• Microscopic-scale interactions of input materials are critical for OIDP performance.

Purpose of the Study:

• To review the application of advanced microscopy techniques for characterizing solid-state properties of particulate materials used in OIDPs.
• To provide insights into how these techniques aid in understanding material attributes and their influence on product functionality.
• To guide risk assessment and control strategies in OIDP development.

Main Methods:

• Discussion of fundamental principles behind advanced microscopy techniques relevant to particulate materials.
• Overview of instrumentation types and data interpretation methodologies.
• Case studies and examples of applications in OIDP development.

Main Results:

• Advanced microscopy provides critical insights into surface, interfacial, and particulate interactions at a microscopic level.
• Characterization of solid-state properties using these techniques helps identify critical quality attributes of APIs and excipients.
• Understanding these properties enables better prediction and control of OIDP performance.

Conclusions:

• Advanced microscopy is indispensable for the material science-based development of OIDPs.
• These techniques facilitate a deeper understanding of how input material properties influence product functionality and risk.
• Implementing these analytical tools supports efficient product development and enhances the quality of orally inhaled drug products.