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Forced Degradation Studies of Candesartan Cilexetil and Hydrochlorothiazide Using a Validated Stability-Indicating HPLC-UV Method

  • STRUCTURE OF CHEMICAL COMPOUNDS, METHODS OF ANALYSIS AND PROCESS CONTROL
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Forced degradation studies of candesartan cilexetil (CCX) and hydrochlorothiazide (HCTZ) were performed by using stressed drugs under acid, alkaline, and neutral hydrolysis; oxidation; photolysis; and thermal degradation conditions. A simple and specific method of high-performance liquid chromatography with UV detection was developed for simultaneous determination of CCX, HCTZ, and their degradation products. Optimum conditions were achieved with a running buffer mixture of acetonitrile and 10 mM phosphate buffer (pH 7.0; 32 : 68, v/v) at a flow rate of 1.0 mL/min using a Zorbax stable-bond cyano (SB CN) column (4.6 × 150 mm, 5 μm), 25°C column temperature, and 254 nm UV detection wavelength. This method was validated for linearity, range, accuracy, precision, and specificity according to International Conference on Harmonization (ICH) guidelines. All figures of merit for method validation are acceptable. The method proved to be stability-indicating because it also analyzed drugs in the presence of their degradation products with a resolution of the critical peak pair at least 1.5 and peak purity values greater than 990. CCX was stable under neutral hydrolysis, photolysis, and thermal degradation conditions but degraded under acid and alkaline hydrolysis and oxidation conditions. HCTZ was stable under oxidation, photolysis, and thermal degradation conditions but degraded under neutral, acid, and alkaline hydrolysis conditions.

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Acknowledgements

This work was supported by the 60th Year Supreme Reign of His Majesty King Bhumibol Adulyadej Scholarship of Mahidol University, the Office of the High Education Commission, and Mahidol University under the National Research Universities Initiative. We are thankful for the kind provision of CCX and HCTZ working standards and raw materials from the Government Pharmaceutical Organization (GPO) of Thailand.

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Authors and Affiliations

  1. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand

    Chutima Matayatsuk Phechkrajang, Phan Thi Nhu Quynh & Leena Suntornsuk

  2. Center of Excellence for Innovation in Drug Design and Discovery, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand

    Chutima Matayatsuk Phechkrajang

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  1. Chutima Matayatsuk Phechkrajang
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  2. Phan Thi Nhu Quynh
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  3. Leena Suntornsuk
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Correspondence to Chutima Matayatsuk Phechkrajang.

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Phechkrajang, C.M., Quynh, P.T.N. & Suntornsuk, L. Forced Degradation Studies of Candesartan Cilexetil and Hydrochlorothiazide Using a Validated Stability-Indicating HPLC-UV Method. Pharm Chem J 51, 416–424 (2017). https://doi.org/10.1007/s11094-017-1625-0

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  • DOI: https://doi.org/10.1007/s11094-017-1625-0

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