Solid dispersion of meloxicam: factorially designed dosage form for geriatric population

Area of Science:

• Pharmaceutical Sciences
• Materials Science

Background:

• Poor water solubility of meloxicam limits its bioavailability.
• Developing effective dosage forms for geriatric populations presents unique challenges.

Purpose of the Study:

• To enhance the dissolution rate of meloxicam, a poorly water-soluble non-steroidal anti-inflammatory drug (NSAID).
• To formulate a suitable dosage form for geriatric patients using solid dispersion technology.

Main Methods:

• Preparation of meloxicam solid dispersions using hydroxyethyl cellulose (HEC), mannitol, and polyethylene glycol 4000 (PEG 4000).
• Characterization of solid dispersions using Differential Scanning Calorimetry (DSC), X-ray Diffractometry (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy (SEM).
• In vitro dissolution studies and formulation optimization of the meloxicam-PEG 4000 solid dispersion into a suspension using a 2^3 factorial design.

Main Results:

• Solid dispersions significantly improved meloxicam's in vitro dissolution compared to physical mixtures and the pure drug.
• Meloxicam-PEG 4000 solid dispersion at a 1:9 ratio demonstrated the highest drug release (100.2%).
• Optimized suspension formulations with higher methyl cellulose and sodium citrate or Tween 80 levels showed enhanced drug release.

Conclusions:

• Solid dispersion technology effectively improves the dissolution properties of poorly water-soluble meloxicam.
• PEG 4000 is a promising carrier for meloxicam solid dispersions, facilitating enhanced drug release.
• The developed meloxicam suspension is a viable dosage form for geriatric patients, with optimized formulations showing superior drug release profiles.