Abstract
The purpose of the present study is to develop a simple, rapid and sensitive stability-indicating high-performance liquid chromatography (HPLC) method for Clopidogrel Bisulfate (CBS) and further extending it for assessment of CBS stability in osmotic and pulsatile tablet formulations tested under accelerated conditions. A stability-indicating HPLC method for quantitative determination of CBS in gastro-retentive formulations is developed by using a C18 HPLC column, acetonitrile and 0.1% formic acid (60:40 v/v) as mobile phase, with a flow rate of 0.9 mL/min, UV detection at 222 nm and subsequently validated. The key objective was to analyze the stability profile of formulations under accelerated conditions. The retention time (Rt) of CBS was observed as 5.9 min with the linearity range between 0.06–1.95 μg/mL. Forced degradation studies were performed on bulk samples of CBS using acidic, basic, oxidative, thermal (80 °C) and photolytic (under sunlight) conditions. The resulting method was validated as per ICH Q2(R1) guidelines. Moreover, an attempt has been made to identify the degradation products by Liquid chromatography-mass spectrometry (LC–MS) analysis. The proposed method was successfully applied to novel gastro-retentive tablet formulations (osmotic tablet and pulsatile tablet) for assessment of stability under accelerated conditions.
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