ICH Guidance in Practice: Validated Stability-Indicating HPLC Method for Simultaneous Determination of Olmesartan Medoximil and Hydrochlorothiazide in Combination Drug Products
 
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Pharmaceutical Analysis Department, Seth Govind Raghunath Sable College of Pharmacy, Saswad, Tal- Purandar, Dist- Pune, India
CORRESPONDING AUTHOR
Vijaya P. Godse   

Pharmaceutical Analysis Department, Seth Govind Raghunath Sable College of Pharmacy, Saswad, Tal- Purandar, Dist- Pune, India
Publish date: 2017-10-27
 
Eurasian J Anal Chem 2010;5(2):137–144
KEYWORDS
ABSTRACT
Olmesartan and hydrochlorothiazide were degraded together under different stress test conditions prescribed by International Conference on Harmonization. The samples so generated were used to develop a stability-indicating high performance liquid chromatographic (HPLC) method for the two drugs. The drugs were well separated from degradation products using a reversed-phase (C-18) column and a mobile phase comprising of acetonitrile: phosphate buffer (pH 3.0), which was delivered initially in the ratio of 15:85 (v/v) for 6 min, then changed to 30:70 (v/v) for next 20 min, and finally equilibrated back to 15:85 (v/v) from 20 to 25 min. Other HPLC parameters were: flow rate, 1 ml/min-1; detection wavelengths, 258 nm for olmesartan and 224nm for hydrochlorothiazide and injection volume, 20 μl. The method was validated for selectivity, linearity, precision, accuracy, and specificity. Results were obtained, indicating that the proposed single method allowed selective analysis of both olmesartan and hydrochlorothiazide, in the presence of their degradation products formed under a variety of stress conditions. The developed procedure was also applicable to the determination of instability of the drugs in commercial products.
 
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