Liquid antisolvent crystallization of pharmaceutical compounds: current status and future perspectives

Area of Science:

• Pharmaceutical Nanotechnology
• Materials Science
• Chemical Engineering

Background:

• Many pharmaceutical compounds suffer from poor solubility, limiting their therapeutic efficacy and bioavailability.
• Traditional crystallization methods often yield particles with broad size distributions, hindering consistent drug delivery.
• Nanoparticle engineering is crucial for enhancing drug performance, but scalable and efficient methods are needed.

Purpose of the Study:

• To review the Liquid Antisolvent Crystallization (LASC) technique for pharmaceutical nanoparticle preparation.
• To explore methods for controlling particle size and distribution, including ultrasound, additives, and continuous flow systems.
• To discuss the application of LASC for herbal compounds and its potential as an inexpensive alternative to other methods.

Main Methods:

• Review of scientific literature on Liquid Antisolvent Crystallization (LASC).
• Discussion of LASC modifications: ultrasound, additives, ionic liquids, and continuous flow reactors.
• Analysis of LASC in microfluidic devices and its combination with homogenization and spray drying.

Main Results:

• LASC effectively produces nanoparticles of pharmaceutical compounds, enhancing solubility, dissolution rate, and bioavailability.
• Ultrasound and additives aid in achieving narrow particle size distributions.
• Ionic liquids offer a greener alternative to conventional organic solvents in LASC.
• Continuous flow reactors and microfluidic devices present promising advancements over batch crystallization.
• LASC is a cost-effective alternative to supercritical CO2 antisolvent methods for nanoparticle preparation.

Conclusions:

• Liquid antisolvent crystallization is a highly adaptable and effective technique for pharmaceutical nanoparticle production.
• Emerging technologies like microfluidics and continuous flow reactors further enhance LASC's capabilities.
• LASC holds significant potential for the development of poorly soluble drugs, including herbal compounds, and warrants further research.