Abstract
A stability-indicating HPLC method has been developed and subsequently validated for the simultaneous determination of domperidone and pantoprazole in commercial tablets. The proposed HPLC method utilizes Phenomenex® Gemini C18 column (150 mm × 4.6 mm i.d., 5 μm) and mobile phase consisting of methanol-acetonitrile-20 mM dipotassium hydrogen phosphate and phosphoric acid buffer pH 7.0 (20:33:47, v/v/v) at a flow rate of 1.19 mL min−1. Quantitation was achieved with UV detection at 285 nm based on peak area with linear calibration curves at concentration ranges 0.5–5.0 μg mL−1 for domperidone and 1.0–10 μg mL−1 for pantoprazole (R 2 > 0.999 for both drugs). The method was validated in terms of accuracy, precision, linearity, limits of detection, limits of quantitation and robustness. This method has been successively applied to pharmaceutical formulation and no interference from the tablet excipients was found. Domperidone, pantoprazole and their combination drug product were exposed to acid, base and neutral hydrolysis, oxidation, dry heat and photolytic stress conditions and the stressed samples were analyzed by the proposed method. As the proposed method could effectively separate the drug from its degradation products, it can be employed as stability-indicating method for the determination of instability of these drugs in bulk and commercial products.
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Thanikachalam, S., Rajappan, M. & Kannappan, V. Stability-Indicating HPLC Method for Simultaneous Determination of Pantoprazole and Domperidone from their Combination Drug Product. Chroma 67, 41–47 (2008). https://doi.org/10.1365/s10337-007-0452-y
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DOI: https://doi.org/10.1365/s10337-007-0452-y