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Perindopril erbumine is a specific inhibitor of angiotensin-converting enzyme, indapamide is the one providing thiazide diuretic effect, and amlodipine besylate is a calcium antagonist which belongs to the dihydropyridines which helps to maintain the pressure of the blood in the patient having arterial hypertension. The literature survey discloses that only one method is available for the estimation of the combination in the quantitative analytical liquid chromatographic method. Moreover to this, the literature review also reveals that HPTLC, UV spectroscopy, and HPLC methods are available for the analysis of either of the two in combination. Hence, our area of interest is to develop and validate the RP-HPLC in order to quantify perindopril erbumine, indapamide, and amlodipine besylate simultaneously in bulk and formulation. Sensitive and accurate RP-HPLC method was developed for the simultaneous estimation of indapamide, perindopril erbumine, and amlodipine besylate in bulk and available as triplixam-marketed tablet dosage form which is a combination of these drugs. The Phenomenex C-18 column (250 mm × 4.6 mm, 5 μm) was used as a stationary phase, and acetonitrile: methanol: water (30:20:50, v/v/v) was found to be optimized mobile phase which was further adjusted to pH 3.0 by utilizing 1.0% orthophosphoric acid; the flow rate kept was 1 ml/min and experiments were performed using PDA detector. The common detection wavelength for all the three APIs was found to be 215.0 nm. The method was validated as per ICH Q2 (R1). The linearity range for amlodipine besylate was found to be 0.500–9.500 μg/ml; for perindopril erbumine was found to be 0.400–7.600 μg/ml, and for indapamide was found to be 0.125–2.375 μg/ml. The correlation coefficient was found to be more than 0.9975 for all three of them, whereas the mean percentage recovery was found to be 99.52–100.71%, 99.49–100.89%, and 99.90–100.78%, respectively. The proposed RP-HPLC method is found to be accurate and robust enough to estimate the perindopril erbumine, indapamide, and amlodipine besylate simultaneously in bulk and available tablet dosage form of combination.

future journal of pharmaceutical sciences

A new RP–HPLC method for simultaneous quantification of perindopril erbumine, indapamide, and amlodipine besylate in bulk and pharmaceutical dosage form