Simultaneous Determination of Lidocaine, Mexiletine, Disopyramide, and Quinidine in Plasma by High Performance Liquid Chromatography

Abstract
A high performance liquid chromatographic method is described for the simultaneous quantitation of four commonly prescribed antiarrhythmic drugs: lidocaine, mexiletine, disopyramide, and quinidine. An isocratic system using a reverse phase column was used to separate these compounds. Coefficients of variation were less than 4%.