Abstract
This work describes the methodology for the analysis of terfenadine and the acid metabolite of terfenadine in plasma using high-performance liquid chromatography. The use of solid-phase extraction allows the use of robotic or manual sample preparation for the efficient clean-up of terfenadine and terfenadine acid metabolite from plasma. Additional selectivity is obtained through the use of fluorescence detection. For terfenadine, the validated quantitation range of this method is 10.0–84.2 ng/ml with coefficients of variation of 5.7–30%. For terfenadine acid metabolite, the validated quantitation range of this method is 8.2–500 ng/ml with coefficients of variation of 4.1–24%.
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