Smartcrystals for Efficient Dissolution of Poorly Water-Soluble Meloxicam

Area of Science:

• Pharmaceutical Sciences
• Materials Science
• Drug Delivery

Background:

• Poorly water-soluble drugs require formulation strategies to enhance dissolution and bioavailability.
• Nanocrystal technology is a promising approach for improving the solubility of such drugs.

Purpose of the Study:

• To prepare meloxicam (MLX) nanocrystals using bead milling and high-pressure homogenization (HPH).
• To investigate the effects of different drying methods (room temperature, vacuum, freeze-drying) and cryoprotectants (mannitol, trehalose) on the properties and dissolution of MLX nanocrystals.

Main Methods:

• Preparation of MLX nanosuspension via bead milling and HPH.
• Drying of nanosuspensions using room temperature drying (RD), vacuum-drying (VD), and freeze-drying (FD) with mannitol or trehalose.
• Characterization of nanocrystals using particle size analysis, DSC, XRPD, and dissolution studies.

Main Results:

• MLX nanocrystals with a mean particle size of 242 nm and PDI of 0.36 were successfully prepared.
• Freeze-dried (FD) MLX nanocrystals exhibited enhanced dissolution profiles compared to other drying methods.
• Trehalose-based FD samples showed the smallest particle size, while mannitol-based samples had the highest crystallinity index, influencing dissolution rates.

Conclusions:

• The drying method and cryoprotectant significantly impact the characteristics and dissolution performance of dry MLX nanocrystals.
• Freeze-drying, particularly with trehalose, is an effective method for producing MLX nanocrystals with improved drug release.
• Understanding these formulation parameters is crucial for optimizing nanocrystal-based drug delivery systems.