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Downscaling drug nanosuspension production: processing aspects and physicochemical characterization
Bernard Van Eerdenbrugh1, Bernard Stuyven, Ludo Froyen
1Laboratory for Pharmacotechnology and Biopharmacy, K.U. Leuven, Gasthuisberg O&N2, Herestraat 49, Leuven, Belgium.
AAPS Pharmscitech
|January 17, 2009
Summary
Scaling down nanosuspension production to 10 mg and evaluation to 1 mg is feasible using media milling. This enables efficient nanosuspension screening for preclinical drug development.
Area of Science:
- Pharmaceutical Sciences
- Nanotechnology
- Drug Delivery Systems
Background:
- Nanosuspensions offer improved drug bioavailability.
- Efficient production and characterization methods are crucial for drug development.
- Scaling down processes reduces material requirements for early-stage research.
Purpose of the Study:
- To investigate the feasibility of scaling down nanosuspension production to 10 mg.
- To evaluate physicochemical properties of nanosuspensions using only 1 mg of drug compound.
- To assess different milling systems for nanosuspension preparation.
Main Methods:
- Media milling of seven model drug compounds in 96-well plates and glass vials.
- Characterization using high-performance liquid chromatography (HPLC), dynamic light scattering (DLS), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and X-ray powder diffraction (XRPD).
- Comparison of planetary mill and 96-well plate systems for scalability.
Main Results:
- Nanosuspension production scaled down to 10 mg was feasible for all model compounds.
- The planetary mill system demonstrated greater robustness.
- Dynamic light scattering (DLS) was optimal for size determination; XRPD in capillary mode after freeze-drying yielded superior results.
- Drug content analysis was precise and accurate.
Conclusions:
- Both the production and physicochemical evaluation of nanosuspensions can be successfully downscaled.
- This approach enables efficient nanosuspension screening in preclinical development.
- The study validates miniaturized methods for early-stage pharmaceutical research.
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