The present study describes a simple, accurate, precise and cost effective colorimetric method has been developed for the quantitative
estimation of ranolazine in bulk and pharmaceutical dosage forms. This method is based on the reaction of ranolazine with resorcinol
to form orange yellow colored chromogen. The ?max or the absorption maxima of the drug was found to be 447nm. A linear response
was observed in the range of 5-25µg/ml with a correlation coefficient of 0.9997. The molar absorptivity, Sandell’s sensitivity,
quantitation limit and detection limit of the method was found to be precise and accurate. This method can be used for the
determination of ranolazine in quality control of formulation without interference of the excipients.