Applying Supercritical Fluid Technology to Prepare Ibuprofen Solid Dispersions with Improved Oral Bioavailability

Area of Science:

• Pharmaceutical Science
• Materials Science

Background:

• Many pharmaceutical compounds exhibit poor bioavailability due to limited solubility and dissolution rates.
• Solid dispersions are a strategy to enhance drug solubility and dissolution, but their preparation can be challenging.

Purpose of the Study:

• To investigate the efficacy of supercritical fluid (SCF) technology in preparing stable solid dispersions of ibuprofen (IBU).
• To evaluate the impact of SCF-prepared solid dispersions on the in vitro dissolution and in vivo pharmacokinetic performance of IBU.

Main Methods:

• Supercritical fluid (SCF) technology was employed to prepare ibuprofen-polymer solid dispersions.
• Solid-state characterization using differential scanning calorimetry (DSC), powder X-ray diffraction (PXRD), and scanning electron microscopy (SEM).
• In vitro dissolution studies, in vivo pharmacokinetic (PK) studies in rats, and molecular modeling for binding energy evaluation.

Main Results:

• PXRD and DSC confirmed the amorphous state of IBU within the solid dispersions, indicating good physical stability.
• SCF-prepared IBU dispersions showed significantly improved in vitro dissolution compared to physical mixtures.
• In vivo PK studies demonstrated enhanced Cmax, AUC, and a faster Tmax for SCF-prepared IBU dispersions, indicating superior absorption.

Conclusions:

• SCF technology is a highly effective method for producing stable solid dispersions of ibuprofen.
• The prepared solid dispersions exhibit enhanced physical stability and significantly improved in vitro and in vivo performance.
• SCF technology presents a viable and efficient approach for improving the bioavailability of poorly soluble pharmaceutical compounds.