Ofloxacin, a second generation fluoroquinolone, shows poor aqueous solubility and dissolution profile. Thus, ofloxacin–β-cyclodextrin complexes were prepared to improve its dissolution by imparting an environment of improved hydrophilicity. Ofloxacin was complexed with β-cyclodextrin (in 1:1 and 1:2 molar ratio) by two different methods namely, solvent evaporation and kneading method. These inclusion complexes were evaluated for solubility, drug content, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), X ray powder diffraction (XRPD) and in vitro dissolution study. The highest drug content (35.45%) was found in complex made by kneading method (OK1:1) in 1:1 molar ratio. All the complexes OSE1:1, OSE1:2, OK1:1, OK1:2 were found to be showing rough and porous surface morphology in SEM. Solubility as well as the dissolution of the complexes was found to be improved. Complex prepared by kneading method in 1:1 molar ratio (OK1:1) showed a marked improvement in percent drug release (88.94%) than that of pure drug (54.22%) at the end of 1 hour in dissolution study. FTIR, DSC and XRPD data confirmed the formation of inclusion complex. It was concluded that the complex made in 1:1 molar ratio (irrespective of the method) showed better solubility and dissolution profile as compared to complex made in 1:2 molar ratio.
Preparation, characterization and in vitro dissolution study of Nitrazepam: Cyclodextrin inclusion complex
