Controlling drug nanoparticle formation by rapid precipitation

Area of Science:

• Pharmaceutical Sciences
• Materials Science
• Chemical Engineering

Background:

• Nanoparticles serve as advanced drug delivery systems for diverse active pharmaceutical ingredients (APIs).
• Reproducible, scalable, and stable nano-formulations are crucial for realizing nanoparticle drug delivery potential.
• Antisolvent precipitation is a robust and scalable manufacturing process for creating drug nanoparticles.

Purpose of the Study:

• To review the nucleation and growth of organic nanoparticles under high supersaturation conditions.
• To discuss process considerations for controlling supersaturation during nanoparticle formation.
• To explore methods for optimizing API solubility to control supersaturation and particle size.

Main Methods:

• Review of nucleation and growth principles in antisolvent precipitation.
• Analysis of process parameters influencing supersaturation.
• Examination of physical and chemical strategies to modify API solubility.
• Discussion of post-precipitation techniques for nanoparticle stabilization.

Main Results:

• High supersaturation drives nanoparticle formation via nucleation and growth.
• Controlling supersaturation is key to achieving desired particle size and formulation characteristics.
• API solubility modification is a viable strategy for optimizing supersaturation.
• Post-precipitation factors significantly impact nanoparticle stability and in vivo efficacy.

Conclusions:

• Antisolvent precipitation is a scalable and robust method for producing drug nanoparticles.
• Optimizing supersaturation through process control and API modification is essential for stable nano-formulations.
• Post-precipitation stabilization is critical for ensuring nanoparticle efficacy in vivo.