High-performance liquid chromatographic assay for the anthelmintic agent mebendazole in human plasma.

A rapid and specific high-performance liquid chromatographic (HPLC) assay for quantitative plasma mebendazole determination is described. After a simple extraction, the compound was analyzed by HPLC using a reversed-phase column and a UV detector (313 nm). Quantitation was accomplished using an internal standard; peak area ratios were determined with an integrating computer. The average mebendazole recovery over a concentration range of 0.01-0.20 microgram/ml was 75.9 +/- 3.8% SD, and the maximum assay sensitivity was approximately 10 ng/ml.