a high performance liquid chromatographic method is reported , which incorporates three internal standards ( i-cinchonidine , n-propylprocainamide , and para-chlorodisopyramide ) for the simultaneous quantitation of four commonly prescribed antiarrhythmic drugs : quinidine , procainamide , n-acetylprocainamide , and disopyramide .
C0003195
antiarrhythmic drugs
C0034414
quinidine