SIMULTANEOUS ESTIMATION OF METFORMIN HYDROCHLORIDE AND REPAGLINIDE BY HPLC METHOD

A reverse phase high performance liquid chromatographic method is developed for the simultaneous determination of metformin hydrochloride and repaglinide. Chromatography was carried out at ambient temperature and separation of these drugs was achieved on neosphere C18 column (150 x 4.6 mmi.d, 3.5 mcgm) as stationary phase with a mobile phase comprising of methanol: 0.05M acetate buffer (pH 3.5) in ratio of (80:20 V/V) at flow rate 0.8 mL/min. The detection wavelength for metformin hydrochloride and repaglinide was 242 nm. The retention times for metformin hydrochloride and repaglinide were 1.8 0.2 min and 8.9 0.2 min respectively. The linearity of metformin hydrochloride and repaglinide was in the range of 2-10 mcg/mL and 5-25 mcg/mL respectively. The recovery was calculated by standard addition method. The proposed method was found to be suitable for simultaneous determination of metformin hydrochloride and repaglinide.