Simultaneous RP-HPLC analysis of atenolol, hydrochlorothiazide, and losartan potassium in a tablet formulation

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<ul><li><p>Acta Chromatographica 22(2010)2, 219226 DOI: 10.1556/AChrom.22.2010.2.5 </p><p>02312522 2010 Akadmiai Kiad, Budapest </p><p>Simultaneous RP-HPLC Analysis of Atenolol, Hydrochlorothiazide, and Losartan Potassium </p><p>in a Tablet Formulation </p><p>A.B. THOMAS*, U.B. CHAVAN, R.K. NANDA, L.P. KOTHAPALLI, S.N. JAGDALE, S.B. DIGHE, AND A.D. DESHPANDE </p><p> Department of Pharmaceutical Chemistry, Padm Dr D.Y. Patil Institute of </p><p>Pharmaceutical Sciences and Research, Pimpri, Pune-411018, Maharashtra, India E-mail: dypharmachem@yahoo.co.in </p><p>Summary. Simultaneous analysis of atenolol (Atn), hydrochlorothiazide (Hctz) and losartan potassium (Los) in solid dosage forms has been achieved by reversed-phase high-performance liquid chromatography on a C18 column with a 0.035 M potassium di-hydrogen orthophosphateacetonitrile gradient as mobile phase and UV detection at 225 nm. The retention times for Atn, Hctz, and Los were 2.91, 4.75, and 7.52 min, respec-tively, with mean recoveries of 99.67, 99.89, and 100.69%. The method was validated in accordance with ICH guidelines. Because of its simplicity and high precision and accu-racy, the method can be used for analysis of atenolol, hydrochlorothiazide and losartan potassium in pharmaceutical preparations. Key Words: atenolol, hydrochlorothiazide, losartan, HPLC </p><p>Introduction Atenolol [Atn; (R,S)-4-(2-hydroxy-3-isopropylaminopropoxy) phenylaceta-mide] is a -blocker which is official in IP, BP, and USP [13]. Hydro-chlorothiazide (Hctz; 6-chloro-3,4-dihydro-2H-1,2,4-benzothiadiazine-7-sulfonamide-1,1-dioxide) is a diuretic official in IP and BP [1, 2]. Losartan [Los; 1-((2-(2H-tetrazol-5-yl)biphenyl-4-yl)methyl)-2-butyl-4-chloro-1H-imi-dazol-5-yl)methanol] is an angiotensin II inhibitor that is official in IP and USP [1, 3]. A combination of these drugs is used for treatment of hyperten-sion. A fixed-dose combination of losartanhydrochlorothiazide is a logical choice for antihypertensive treatment, including for initial therapy in pa-tients with elevated blood pressure. The reninangiotensinaldosterone sys-</p></li></ul>

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