“…A literature survey reveals many techniques have been stated for the determination of LEV, GUA and AMB either alone or in combinations with other active ingredients in a multi-component tablet and liquid dosage formulation as predictable with the variation of column detector and mobile phase. Various methods like HPLC (Vasudevan M et al, 2007;Joshi S et al, 2011;Jain j et al, 2008;Prathap S et al, 2010;Mukesh M et al, 2010;Krishnaveninagappan J et al, 2008;Srividya P et al, 2013;Laura C et al, 1983;Vani R et al, 2014) HPTLC (Prasant j, 2010;Sharma E, 2012;Krunal S, 2014;Bagada H, 2013), Spectrophotometric (Kim R et al, 2011;Umadevi B et al, 2009;Nehal S, 2012;Nirav C et al, 2013;Amit P et al, 2011;Gangwal S et al, 1999) and few LC-MS (Harshal P et al, 2014;Snehal G et al, 2014;Dong X et al, 2013) methods were used for determination of drugs even in Human plasma. Therefore, the present work is aimed to build up and validate RP UPLC method for simultaneous estimation of cough syrup containing LEV, GUA, and AMB in bulk and pharmaceutical dosage forms according to ICH guidelines (ICH Q2(R1) 1996).…”