GLC analysis of thioridazine, mesoridazine, and their metabolites.

A GLC method for measuring thioridazine, mesoridazine, their metabolites, and possibly other phenothiazines was developed. By using this method, seven different phenothiazine derivatives, thioridazine, and six known thioridazine metabolites were extracted and separated. This method was tested by assaying plasma samples from 30 hospitalized psychiatric patients receiving thioridazine or mesoridazine.