Development and validation of RP-HPLC method for determination of Lornoxicam in rabbit's plasma.

A simple, rapid and accurate reverse phase high performance liquid chromatographic (RP- HPLC) method was developed for the quantification of lornoxicam in oral disintegrating tablets (ODTs) and in rabbit's plasma. C18 Hypersil™ column was used as stationary phase to separate the drug. Mobile phase methanol: acetonitrile: water (60:30:10) was run isocratically at flow rate of 1 mL/min at room temperature. Mean retention time was 4.23 minutes and minimum amount of lornoxicam that can be measured was 7 ng/mL in rabbit's plasma. Good linearity was observed in concentration range of 10-100 ng/mL with regression coefficient R2 value of 0.9989 and slope value 23773. As per ICH norms, developed method was validated in terms of interday, intraday precision, accuracy, specificity, limit of detection (LOD), limit of quantification (LOQ) and drug plasma stability studies. All the data obtained revealed that this method can be used for in-vitro and in-vivo determination of lornoxicam in various pharmaceutical preparations.