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Conversion of indomethacin nanosuspensions into solid dosage forms via fluid bed granulation and compaction
Summary
Drying pharmaceutical nanosuspensions using fluid bed granulation with specific binders and spray rates prevents nanoparticle growth. Resulting tablets demonstrate enhanced drug dissolution compared to raw drug formulations.
Area of Science:
- Pharmaceutical Technology
- Materials Science
- Drug Delivery
Background:
- Nanosuspensions enhance dissolution of poorly water-soluble drugs.
- Drying nanosuspensions is critical to prevent nanoparticle growth and maintain solid characteristics.
- Fluid bed granulation offers a method for drying nanosuspensions into a tablet-ready form.
Purpose of the Study:
- To evaluate the drying of indomethacin nanosuspensions using fluid bed granulation.
- To investigate the impact of binder selection, concentration, spray rate, and atomization pressure on nanoparticle stability and granule properties.
- To assess the in vitro dissolution performance of tablets manufactured from dried nanosuspensions.
Main Methods:
- Preparation of indomethacin nanosuspensions via wet media milling.
- Drying of nanosuspensions using fluid bed granulation on a carrier of lactose, microcrystalline cellulose, and crospovidone.
- Design of experiments to identify significant process parameters.
- Tablet compaction and in vitro dissolution testing.
Main Results:
- Higher polyvinylpyrrolidone (PVP) binder content and increased spray rate reduced nanoparticle growth during drying.
- Optimized fluid bed granulation parameters maintained nanoparticle integrity.
- Tablets formulated from indomethacin nanosuspension exhibited significantly improved in vitro dissolution profiles compared to raw indomethacin tablets.
Conclusions:
- Fluid bed granulation is a viable method for drying pharmaceutical nanosuspensions while preserving nanoparticle size.
- Binder selection and process parameters like spray rate are crucial for controlling nanoparticle growth and ensuring superior drug dissolution.
- This approach offers a promising strategy for developing advanced drug delivery systems for poorly soluble drugs.
Keywords:
DissolutionFluid bed granulationIndomethacinNanocrystalsNanoparticlesPolyvinylpyrrolidoneTabletsMore Related Videos
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