Inclusion complexation of nimesulide with beta-cyclodextrins.

Nimesulide (NM), a nonsteroidal anti-inflammatory drug (NSAID) has poor aqueous solubility. The present study describes the complexation of NM with beta-cyclodextrin (beta-CD) and its derivative hydroxypropyl beta-cyclodextrin (HP beta-CD). The complexation was studied by phase solubility method, Fourier transformed infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), and X-ray diffractometry (XRD). The complexes were prepared by a freeze-drying technique. The in vitro dissolution rate of drug-HP beta-CD complex was faster compared to the drug-beta-CD complex and drug alone.