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The use of metabolites of antiarrhythmic drugs (ethmozine, ethacizine, and bonnecor) as haptens in the synthesis of conjugated antigens allowed us to induce the formation of antibodies with different specificity for certain metabolites. A new enzyme immunoassay was developed for the detection of phenothiazine and dibenzazepine derivatives (ethmozine, ethacizine, and bonnecor). Nanogram and subnanogram quantities of these substances may be detected in biological fluids.
View Article and Find Full Text PDFDetermination of drugs in biological fluids by high-performance liquid chromatography with on-line sample processing.
J Chromatogr A
February 1998
Institute of Clinical Pharmacology, Medical Faculty Carl Gustav Carus, Technical University Dresden, Germany.
An automated two column HPLC system with the new packing material LiChrospher RP-18 ADS (alkyl-diol-silica) was tested for the determination of several drugs and metabolites (talinolol, celiprolol, metoprolol, oxprenolol, triamterene, trimethoprim, tiracizine, articaine, detajmium, ajmaline, lamotrigine) in various biological fluids (serum, urine, intestinal aspirates, supernatants of cell cultures and supernatants after protein denaturation). The method allows the direct injection of biological fluids into a reversed-phase HPLC system and on-line clean-up and sample enrichment by a column-switching technique. Precision, accuracy and sensitivity were similar to conventional assays as described in the literature.
View Article and Find Full Text PDFExperiments were conducted on cats to study the cardiotoxic and arrhythmogenic properties of some antiarrhythmic agents in continuous intravenous infusion in doses multiple of the dose which causes an antiarrhythmic effect on an acontic model of arrhythmia in rats in 50% of cases. Novocainamide, cordarone, bonnecor, and quinidine possessed the most marked cardiotoxicity. A less marked cardiodepressive activity was encountered in the case of ethmosine and ethacysin.
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