Clinical Chemistry
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Clinical Chemistry 23: 2283-2287, 1977;
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Clinical Chemistry, Vol 23, 2283-2287, Copyright © 1977 by American Association for Clinical Chemistry

Measurement of carbamazepine and its epoxide metabolite by high- performance liquid chromatography, and a comparison of assay techniques for the analysis of carbamazepine

GW Mihaly, JA Phillips, WJ Louis and FJ Vajda

We describe a modified high-performance liquid-chromatographic method for the simultaneous analysis of carbamazepine andits biologically active metabolite, carbamazepine-10, 11-epoxide. Concentrations of both these compounds in the plasma of 35 epileptic patients receiving chronic carbamazepine therapy are presented. Concentrations of carbamazepine in plasma were related to those of carbamazepine-10, 11- epoxide (r - 0.495, P less than 0.05). Total daily doses of carbamazepine were better correlated with plasma concentrations of carbamazepine-10, 11-epoxide (r = 0.714, P less than 0.001) than of carbamazepine (r = 0.269, P greater than 0.05). Close correlations were found between results of the three assay procedures we used to measure plasma carbamazepine concentrations: high-performance liquid chromatography, gas-liquid chromatography, and enzyme immunoassay. Correlation coefficients exceeded 0.97 and regression slopes were near unity, indicating that all three procedures were individually specific for the quantification of plasma carbamazepine.


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 Arch NeurolHome page
T. Tomson
Interdosage Fluctuations in Plasma Carbamazepine Concentration Determine Intermittent Side Effects
Arch Neurol, August 1, 1984; 41(8): 830 - 834.
[Abstract] [PDF]


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Copyright © 1977 by the American Association for Clinical Chemistry.