A simple and sensitive high performance liquid chromatography method was developed for determination of glibenclamide in presence of its impurities in pharmaceutical dosage form and human plasma. Instrumentation of the method was very simple and used the mixture of acetonitrile: water (60:40, v/v) as the mobile phase. Separation was carried out on a BDS. Hypersil C 8 (5 um, 250 × 4.6 mm) column. Effects of composition of mobile phase in addition to flow rate and detection wave length were studied. Calibration was obeyed in the range of 20-100 µg/ml of glibenclamide. The method was validated according to ICH parameters.

A novel isocratic HPLC method had been developed for rapid simultaneous separation and determination of cinnarizine and Piracetam in pure form or in pharmaceutical formulations within less than 10 minutes. Separation was carried out on a Hypersil gold C 18 (10µm, 100x4.6mm) column. Effect of pH and composition of mobile phase in addition to flow rate was studied. Calibration was obeyed in the range of (10-80) µg/ml for cinnarizine or (160-960) µg/ ml for Piracetam. The method was applied for the simultaneous determination of these drugs in both bulk and pharmaceutical forms and this is the first published method that uses isocratic HPLC method for cinnarizine and piracetam determination in combined formulation and the method were validated according to ICH parameters.